Nasurudiin, S., A. Yoshikawa, A. Elsaid, A. Mahrous, Prediction of ionospheric scintillations using machine learning techniques during solar cycle 24 across the equatorial anomaly, Atmosphere,15,10,2024,1213,doi:10.3390/atmos15101213
Domingo, Z. N. C., E. P. Macalalad, A. Yoshikawa, Low-latidude ionospheric and geomagnetic disturbances caused by the X7.13 solar flare of 25 February 2014, Universe, 11,2,2025,70,doi:10.3390/universe11020070
Muhammad Asraf Hairuddin, Aznilinda Zainuddin, Zatul Iffah Abd Latiff, Nornabilah Mohd Anuar, Nur Dalila Khirul Ashar, Zety Sharizat Hamidi, Abu Hassan Nordin, Ahmad Ihsan Mohd Yassin, A. Yoshikawa, Mohamad Huzaimy Jusoh, An overview of 33 years of trends in space weather research: a bibliometric analysis (1988-2021), Bulletin of Electrical Engineering and Informatics,14,1,2025,234-249,doi:10.11591/eei.v14i1.8159
Pappoe, J. A., A. Yohikawa, A. Kandil, A. Mahrous, A machine learning approach combined with wavelet analysis for automatic detection of Pc5 geomagnetic pulsations observed at geostationary orbits, Advances in Space Research,74,12,2023,6277-6291,doi:10.1016/j.asr.2023.11.001
Abbas, M, I. F. Mukhtar, B. K. Mohammad, M. H. Jusoh, A. Yoshikawa, Longitudinal morphology of the morning counter equatorial electrojet during low solar activity, International Astronomy and Astrophysics Research Journal,6,1,2024,81-92,doi:10.9734/iaarj/2024/v6i1106
Zhou, X., G. Chen, X. Yue, R. Zhang, A. Yoshikawa, Intraseasonal variability of the equatorial ionosphere responses to the Madden-Julian oscillation, Journal of Geophysical Research: Space Physics,129,12,2024,e2024JA033342,doi:10.1029/2024JA033324
Zhang, R., L. Liu, Y. Yang, W. Li, X. Zhao, A. Yoshikawa, M. A. Tariq, Y. Chen, H. Le, Ionosphere responses over Asian-Australian and American sectors to the 10-12 May 2024 superstorm, Journal of Geophysical Research: Space Physics,129,12,2024,e2024JA033071,doi'10.1029/2024JA033071
M. Vazifehkhah Hafteh, A. Mahmoudian, A. Yoshikawa, K. Girgis, Mid-latitude study of ionosphere variation over Iran associated with equatorial ionization anomaly (EIA), and artificial neural networks model development, Space Weather,22,11,2024,e2024SW004032,doi:10.1029/2024SW004032
Sebwato, N., A. Yoshikawa, A. Mahrous, A. Elsaid, Comparative study of ground-based and satellite observations of Pc5 geomagnetic pulsations during solar cycle 23,in press,doi:10.21203/rs.3.rs-4995901/v1
Higuchi, H., j. W. Pedersen, K. Toyoizumi, K. Yoshikawa, C. Kiumi, A. Yoshikawa, Quantum calculation for two-stream instability and advection test of Vlasov-Maxwell equations: numerical evaluation of Hamiltonian simulation,in press,doi:10.48550/arXiv.2408.11550
Raja Adibah Raja Halim Shah, Nurul Shazana Abdul Hamid, Mardina Abdullah, Adlyka Annuar, Idahwati Sarudin, Zahira Mohd Radzi, A. Yoshikawa, A comprehensive classification and analysis of geomagnetic storms over solar cycle 24, Research in Astronomy and Astrophysics,2024,doi:10.1088/1674-4527/ad5b34
Girgis, K. M., T. Hada, A. Yoshikawa, S. Matsukiyo, A. C.-L. Chian, E. Echer, Inner radiation belt simulation during the successive geomagnetic storm event of February 2022, Space Weather,22,7,2024,e2023SW003789,doi:10.1029/2023SW003789
Justice Allotey Pappoe, Yoshikawa Akimasa, Ali Kandil, Ayman Mahrous, Machine learning techniques for estimation of Pc5 geomagnetic pulsations observed at geostationary orbits during solar cycle 23, Journal of Atmospheric and Solar-Terrestrial Physics,260,2024,106258,doi:10.1016/j.jastp.2024.106258
Emad M Takla, A. Yoshikawa, T. Uozumi, K. M. Girgis, A. Abdelkader, Daily geomagnetic variations under variable IMF/solar conditions and their connection with underground conductivity changes in Japan, Annals Geophysicae,67,1,2024,GM102,doi:10.4401/ag-9021
M. Arslan Tariq, L. Liu, M. Shah, Y. Yang, W. Sun, M. A. Shah, R. Zhang, A. Yoshikawa, Longitudinal variations of ionospheric responses to the February and April 2023 geomagnetic storms over American and Asian sectors, Advances in Space Research,73,6,2024,3033-3049,doi:10.1016/j.asr.2023.12.039
Syed Zafar, S. N. A., R. Umar, S. N. Hazmin, M. H. Jusoh, A. Yoshikawa, S. Abe, T. Uozumi, N. Z. M. Afandi, N. A. Mahiddin, Modeling of ULF Pc4-Pc5 pulsations with solar winds and geomagnetic storm for ULF earthquake precursor, Advances in Space Research,73(3),2024,1814-1830,doi:10.1016/j.asr.2023.10.036
Vyacheslav A. Pilipenko, Valery A. Martines-Bedenko, A. Yoshikawa, K. M. Girgis, Critical analysis of the ULF power depression as a possible Tohoku earthquake precursor, Earthquake Science,37,5,2024,407-414,doi:10.1016/j.eqs.2024.06.003
Girgis, K. M., T. Hada, A. Yoshikawa, S. Matsukiyo, V. Pierrard, S. W. Samwel, Geomagnetic storm effects on the LEO proton flux during solar energetic particle events, Space Weather,21,12,2023,e2023SW003664,doi:10.1029/2023SW003664
Nur Dalila K. A., M. H. Jusoh, S. Mashohor, A. Sali, A. Yoshikawa, N. Kasuan, M. H. Hashim, M. A. Hairuddin, Bibliographic dataset of literature for analysing global trends and progress of the machine learning paradigm in space weather research,Data in Brief,51,2023,109667,doi:10.1016/j.dib.2023.109667
Omondi, S. O., A. Yoshikawa, T. Uozumi, Y. Obana, M. Hayashi, A. M. Mahrous, Wavelet analysis for automatic detection of Pi-2 pulsations during substorm onset along the 210° magnetic meridian,in press,doi:10.22541/essoar.170000392.22424750
Umar, R., A. N. Dagang, N. S. I. Roslan, S. N. A. Syed Zafar, M. H. Jusoh, A. Yoshikawa, S. Abe, T. Uozumi, Response of the geomagnetic horizontal component during solar events at RANAU station, Indian Journal of Physics,2023,doi:10.1007/s12648-023-02721-z
Takla, E. M., S. Maryanto, A. Yoshikawa, T. Uozumi, Latitudinal dependence of Pc3-4 amplitudes across the dip equator along the 210º magnetic meridian, Annals of Geophysics,66,3-4,2023,GM323,doi:10.4401/ag-8979
Bello, S. A., M. Abdullah, N. S. A. Hamid, K. A. Yusuf, A. Yoshikawa, A. Fujimoto, Robust least square modelling for selected daytime ionospheric parameters using geomagnetic observations at low latitudes, Advances in Space Research,72(5),2023,1615-1633,doi:10.1016/j.asr.2023.04.040
Hamid, N. S. A., R. A. R. Halim, I. Sarudin, A. Yoshikawa, A. Fujimoto, Examining solar flare effects on earth's ionosphere using ground-based measurements,Sains Malaysiana,52,8,2023,2309-2322,doi:10.17576/jsm-2023-5208-11
Omondi, S., A. Yoshikawa, W. K. Zahra, I. Fathy, A. Mahrous, Alex magnetometer and telluric station in Egypt: First results on pulsation analysis, Advances in Space Research,72,3,2023,711-725,doi:10.1016/j.asr.2022.09.014
Omondi, S., A. Yoshikawa, W. K. Zahra, I. Fathy, A. Mahrous, Automatic detection of auroral Pc5 geomagnetic pulsation using machine learning approach guided with discrete wavelet transform, Advances in Space Research,72,3,2023,866-883,doi:10.1016/j.asr.2022.06.063
Higuchi, H., J. W. Pedersen, A. Yoshikawa, Quantum Calculation of Classical Kinetic Equations: A Novel Approach for Numerical Analysis of 6D Boltzmann-Maxwell Equations in Collisionless Plasmas Using Quantum Computing,2023,in press,doi:10.48550/arXiv.2306.05967
Nakamura, Y., K. Terada, C. Tao, N. Terada, Y. Kasaba, F. Leblanc, H. Kita, A. Nakamizo, A. Yoshikawa, S. Ohtani, F. Tsuchiya, M. Kagitani, T. Sakanoi, g. Murakami, K. Yoshioka, T. Kimura, A Yamazaki, I. Yoshikawa, Simulation of dawn-to-dusk electric field in the Jovian inner magnetosphere via Region 2-like field-aligned current,Journal of Geophysical Research: Space Physics,128,6,2022,e2022JA031248,doi:10.1029/2022JA031248
Syed Zafar, S. N. A., R. Umar, N. H. Sabri, M. H. Jusoh, A. Yoshikawa, S. Abe, T. Uozumi, Analysis of ULF emissions in solar winds as a short-term earthquake precursor, ASM Science Journal,18,2023,doi:10.32802/asmscj.2023.1189
Starzhinskii, S. S., A. Yoshikawa, S. Yu Khomutov, Geoelectric Section of the Coastal Region of the Chukchi Sea near the Cape Schmidt Observatory, Russian Geology and Geophysics,63,2022,1459-1473,doi:10.2113/RGG20214362
Yamazaki, Y., Y. Miyoshi, C. Xiong, C. Stolle, G. B. Soares, A. Yoshikawa, Whole Atmosphere Model Simulations of 3-day Kelvin Wave Effects in the Ionosphere and Thermosphere,in press,doi:10.1002/essoar.10503157.1
Soares, G., Y. Yamazaki, A. Morschhauser, J. Matzka, K. J. Pinheiro, C. Stolle, P. Alken, A. Yoshikawa, K. Hozumi, A. Kulkarni, P. Supnithi, Using principal component analysis of satellite and ground magnetic data to model the equatorial electrojet and derive its tidal composition, Journal of Geophysical Research: Space Physics,127,2022,e2022JA030691,doi:10.1029/2022JA030691
Rosli, N. I. M., N. S. A. Hamid, M. Abdullah, K. A. Yusof, A. Yoshikawa, T. Uozumi, B. Rabiu, The Variation of Counter-Electrojet Current at the Southeast Asian Sector during Different Solar Activity Levels, Applied Sciences,12,2022,7138,doi:10.3390/app12147138
Sori, T., A. Shinbori, Y. Otsuka, T. Tsugawa, M. Nishioka, A. Yoshikawa, Generation mechanisms of plasma density irregularity in the equatorial ionosphere during a geomagnetic storm on 21–22 december 2014, Journal of Geophysical Research: Space Physics,127,2022,e2021JA030240,doi:10.1029/2021JA030240
Girgis, K. M., T. Hada, S. Matsukiyo, A. Yoshikawa, Radiation Analysis of LEO Mission in the South Atlantic Anomaly during Geomagnetic Storm, IEEE Journal of Radio Frequency Identification,6,2022,292-298,10.1109/JRFID.2022.3163441
Nakamura, Y., K. Terada, C. Tao, N. Terada, Y. Kasaba, F. Leblanc, H. Kita, A. Nakamizo, A. Yoshikawa, S. Ohtani, F. Tsuchiya, M. Kagitani, T. Sakanoi, G. Murakami, K. Yoshioka, T. Kimura, A. Yamazaki, I. Yoshikawa, Effect of meteoric ions on ionospheric conductance at Jupiter, Journal of Geophysical Research: Space Physics,127,2022,e2022JA030312,doi:10.1029/2022JA030312
Zhang, R., L. Liu, H. Ma, Y. Chen, H. Le, A. Yoshikawa, Extreme enhancements of electron temperature in low latitude topside ionosphere during the October 2016 storm, Journal of Geophysical Research: Space Physics,127,2022,e2022JA030278,doi:10.1029/2022JA030278
Hashim, M. H., M. H. Jusoh, K. Burhanudin, I. M. Yassin, S. Alam, N. S. A. Hamid, Z. M. Radzi, A. Yoshikawa, Preliminary Modelling of Solar Quiet Geomagnetic Field Average using Non-Linear Autoregressive with Exogeneous Input (NARX), Journal of Mechanical Engineering,11,2022,333-345
Owolabi, C., H. Ruan, Y. Yamazaki, R. O. Kaka, O. O. Akinola, A. Yoshikawa, Ionospheric Current Variations by Empirical Orthogonal Function Analysis: Solar Activity Dependence and Longitudinal Differences, Journal of Geophysical Research: Space Physics,127,2022,e2021JA029903,doi:10.1029/2021JA029903
Hairuddin, M. A., Nur Dalila K. A., N. M. Tahir, Z. I. Abd Latiff, M. H. Jusoh, A. Yoshikawa, Missing data imputation of MAGDAS-9’s ground electromagnetism with supervised machine learning and conventional statistical analysis models, Alexandria Engineering Journal,61,2022,937-947,doi:10.1016/j.aej.2021.04.096
Kusano, K., K. Ichimoto, M. Ishii, Y. Miyoshi, S. Yoden, H. Akiyoshi, A. Asai, Y. Ebihara, H. Fujiwara, T. Goto, Y. Hanaoka, H. Hayakawa, K. Hosokawa, H. Hotta, K. Hozumi, S. Imada, K. Iwai, T. Iyemori, H. Jin, R. Kataoka, Y. Katoh, T. Kikuchi, Y. Kubo, S. Kurita, H. Matsumoto, T. Mitani, H. Miyahara, Y. Miyoshi, T. Nagatsuma, A. Nakamizo, S. Nakamura, H. Nakata, N. Nishizuka, Y. Otsuka, S. Saito, S. Saito, T. Sakurai, T. Sato, T. Shimizu, H. Shinagawa, K. Shiokawa, D. Shiota, T. Takashima, C. Tao, S. Toriumi, S. Ueno, K. Watanabe, S. Watari, S. Yashiro, K. Yoshida, A. Yoshikawa, PSTEP: project for solar–terrestrial environment prediction, Earth, Planets and Space,73,2021,159,doi:10.1186/s40623-021-01486-1
Ranasinghe, M., A. Fujimoto, A. Yoshikawa, C. Jayaratne, Seasonal variation of inter-hemispheric field-aligned currents deduced from time-series analysis of the equatorial geomagnetic field data during solar cycle 23–24, Earth, Planets and Space,73,2021,146,doi:10.1186/s40623-021-01481-6
Owolabi, C., H. Ruan, Y. Yamazaki, J. Li, J. Zhong, A. V. Eyelade, S. Priyadarshi, A. Yoshikawa, Empirical modeling of ionospheric current using empirical orthogonal function analysis and artificial neural network, Space Weather,19,2021, e2021SW002831,doi:10.1029/2021SW002831
R. Umar, S. N. A. Syed Zafar, N. H. Sabri, M. H. Jusoh, A. Yoshikawa, S. Abe, T. Uozumi, Earth’s geomagnetic response to solar wind changes associated with solar events at low latitude regions at the TRE MAGDAS Station, IOP Conference Series: Earth and Environmental Science,880,2021,0120009,doi:10.1088/1755-1315/880/1/012009
Syed Zafar, S. N. A., R. Umar, N. H. Sabri, M. H. Jusoh, A. Yoshikawa, S. Abe, T. Uozumi, A statistical analysis of the relationship between Pc4 and Pc5 ULF waves, solar winds and geomagnetic storms for predicting earthquake precursor signatures in low latitude regions, IOP Conference Series: Earth and Environmental Science,880,2021,012010,doi:10.1088/1755-1315/880/1/012010
Farhan Naufal Rifqi, N. S. A. Hamid, A. Babatunde Rabiu, A. Yoshikawa, Identification of Fractal Properties in Geomagnetic Data of Southeast Asian Region during Various Solar Activity Levels, Universe,7,7,2021,248,doi:10.3390/universe7070248
Syed Zafar, S. N. A., R. Umar, N. H. Sabri, M. H. Jusoh, A. N. Dagang, A. Yoshikawa, Effects of solar flares and coronal mass ejections on Earth’s horizontal magnetic field and solar wind parameters during the minimum solar cycle 24, Monthly Notices of the Royal Astronomical Society,504,3,2021,3812-3822,doi:10.1093/mnras/stab1161
Kuai, J., Q. Li, J. Zhong, X. Zhou, L. Liu, A. Yoshikawa, L. Hu, H. Xie, C. Huang, X. Yu, X. Wan, J. Cui, The Ionosphere at Middle and Low Latitudes under Geomagnetic Quiet Time of December 2019, Journal of Geophysical Research: Space Physics,126,6,2021,e2020JA028964,doi:10.1029/2020JA028964
Zakaria, N. A., S. H. M. Yusoff, N. A. M. Rizal, N. S. A. Hamid, M. H. Hashim, Z. Mohd Radzi, M. H. Jusoh, A. Yoshikawa, T. Uozumi, S. Abe, Installation and preliminary data analysis of Penang magnetic data Acquisition system (MAGDAS) in Malaysia, Advances in Space Research,2021,2199-2206,doi:10.1016/j.asr.2021.01.009
Hamid, N. S. A., N. I. M. Rosli, W. N. I. Ismail, A. Yoshikawa, Effects of solar activity on ionospheric current system in the Southeast Asia region, Indian Journal of Physics,95,4,2021,543-550,doi:10.1007/s12648-020-01734-2
Ghamry, E, E. K. Mohamed, M. S. Abdalzaher, M. Elwekeil, D. Marchetti, A. D. Santis, M. Hegy, A. Yoshikawa, A. Fathy, Integrating pre-earthquake signatures from different precursor tools, IEEE Access,9,2021,33268-33283,doi:10.1109/ACCESS.2021.3060348
Elgiddawy, S. A., A. G. Hafez, A. Lethy, O. M. Saad, A. A. M. Khalaf, A. Yoshikawa, H. F. A. Hamed, The Multi-Optimized Parameter Technique for Near Online Automatic Determination of Geomagnetic Sudden Commencement Arrival Time, Arabian Journal for Science and Engineering,46,2,2021,901-908,doi:10.1007/s13369-020-04773-3
Wan Nur Izzaty Ismail, Nurul Shazana Abdul Hamid, Mardina Abdullah, Akimasa Yoshikawa, Teiji Uozumi, Zahira Mohd Radzi, Comparison of EEJ Longitudinal Variation from Satellite and Ground Measurements over Different Solar Activity Levels, Universe,7,2,2021,23,doi:10.3390/universe7020023
Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Suaidi Ahadi, Akimasa Yoshikawa, Correlations between Earthquake Properties and Characteristics of Possible ULF Geomagnetic Precursor over Multiple Earthquakes, Universe,7,1,2021,20,doi:10.3390/universe7010020
Saeed Abioye Bello, Nurul Shazana Abdul Hamid, Mardina Abdullah, Akimasa Yoshikawa, Kornyana Hozumi, Takuya Tsugawa, Equatorial Electrojet and electron density over Southeast Asian Region during moderate solar activity condition, Indian Journal of Radio & Space Physics,50,2021,125-131,link
Girgis, K. M., T. Hada, S. Matsukiyo, A. Yoshikawa, Inner radiation belt simulations of the proton flux response in the South Atlantic Anomaly during the Geomagnetic Storm of 15 May 2005, Journal of Space Weather and Space Climate,11,2021,48,doi:10.1051/swsc/2021031
Muhammad Asraf H., Nur Dalila K.A., Nooritawati Md Tahir, Zatul Iffah Abd Latiff, Mohamad Huzaimy Jusoh, Yoshikawa A., Missing data imputation of MAGDAS-9’s ground electromagnetism with supervised machine learning and conventional statistical analysis models, Alexandria Engineering Journal,2021,doi:10.1016/j.aej.2021.04.096
Jiawei Kuai, Qiaoling Li, Jiahao Zhong, Xu Zhou, Libo Liu, Akimasa Yoshikawa, Lianhuan Hu, Haiyong Xie, Chaoyan Huang, Xumin Yu, Xin Wan, Jun Cui, The Ionosphere at Middle and Low Latitudes under Geomagnetic Quiet Time of December 2019, Journal of Geophysical Research: Space Physics,126,6,2021,e2020JA028964,doi:10.1029/2020JA028964
F. N. Rifqi, N. S. A. Hamid, A. Yoshikawa, Possibility of robust detrended fluctuation analysis as a method for identifying fractal properties of geomagnetic time series, Journal of Physics: Conference Series,1768,1,2021,012044,doi:10.1088/1742-6596/1768/1/012004
N. I. M. Rosli, N. S. A. Hamid, M. Abdullah, A. Yoshikawa, Defining different type of CEJ currents based on ground-based geomagnetic data record at Langkawi station, Malaysia, Journal of Physics: Conference Series,1768,1,2021,012005,doi:10.1088/1742-6596/1768/1/012005
Imajo, S., M. Nosé, M. Aida, N. Higashio, H. Matsumoto, K. Koga, C. Smith, R. J. MacDowall, A. Yoshikawa, Evolution of field-aligned current in the meridional plane during substorm: multipoint observations from satellites and ground stations, Earth, Planets and Space,72,2020,1-9,doi:10.1186/s40623-020-01182-6
Hussein M. Farid, R. Mawad, E. Ghamry, A. Yoshikawa, The Impact of Coronal Mass Ejections on the Seasonal Variation of the Ionospheric Critical Frequency f0F2, Universe,6,11,2020,200,doi:10.3390/universe6110200
Qiaoling Li, Fuqing Huang, Jiahao Zhong, Ruilong Zhang, Jiawei Kuai, Jiuhou Lei, Libo Liu, Dexin Ren, Han Ma, Akimasa Yoshikawa, Lianhuan Hu, Jiapeng Guo, Wenbo Li, Xu Zhou, Jun Cui, Persistence of the Long‐Duration Daytime TEC Enhancements at Different Longitudinal Sectors During the August 2018 Geomagnetic Storm, Journal of Geophysical Research: Space Physics,125,11,2020,e2020JA028238,doi:10.1029/2020JA028238
Charles Owolabi, Jiuhou Lei, OS Bolaji, Dexin Ren, Akimasa Yoshikawa, Ionospheric Current Variations Induced by the Solar Flares of 6 and 10 September 2017, Space Weather,18,11,2020,e2020SW002608,doi:10.1029/2020SW002608
Fuqing Huang, Jiuhou Lei, Ruilong Zhang, Na Li, Shengyang Gu, You Yu, Libo Liu, Charles Owolabi, Baiqi Ning, Guozhu Li, Jiahao Zhong, Tong Dang, Dexin Ren, Wen Yi, Xiaoli Luan, Xianghui Xue, Tao Yu, Faquan Li, Xiankang Dou, Akimasa Yoshikawa, Prominent daytime TEC enhancements under the quiescent condition of January 2017,Geophysical Research Letters,47,14,2020,e2020GL088398,doi:10.1029/2020GL088398
Yamazaki, Y., Y. Miyoshi, C. Xiong, Claudia Stolle, G. Soares, A. Yoshikawa, Whole Atmosphere Model Simulations of Ultrafast Kelvin Wave Effects in the Ionosphere and Thermosphere, Journal of Geophysical Research: Space Physics,125,7,2020,e2020JA027939,doi:10.1029/2020JA027939
S. S. Starzhinskii, V. M. Nikiforov, A. Yoshikawa, The Experience of Magnetovariational Sounding in the Arctic: the Laptev Sea Region Izvestiya, Physics of the Solid Earth,56,2020,225-237,doi:10.1134/S106935132002010X
Essam Ghamry, Dedalo Marchetti, A. Yoshikawa, T. Uozumi, Angelo De Santis, Loredana Perrone, Xuhui Shen, Adel Fathy The First Pi2 Pulsation Observed by China Seismo-Electromagnetic Satellite, Multidisciplinary Digital Publishing Institute,12,14,2020,2300,doi:10.3390/rs12142300
Uozumi, T., A. Yoshikawa, S. Ohtani, Formation of a 3‐D Oscillatory Current System Associated With Global High‐Correlation Pi 2 Event: A Case Study, Journal of Geophysical Research: Space Physics,125,1,2020,e2019JA026988,doi:10.1029/2019JA026988
Tanaka, Y., Y. Ogawa, A. Kadokura, T. Nishiyama, A. Yoshikawa, Bjorn Gustavsson, Kirsti Kauristie, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Tero Raita, Heikki Vanhamaki, 3D structure of discrete arcs obtained by auroral computed tomography analysis,The Tenth Symposium on Polar Science/Ordinary sessions,2019
S. Tulasi Ram, B. Nilam, N. Balan, Q. Zhang, K. Shiokawa, D. Chakrabarty, Z. Xing, K. Venkatesh, B. Veenadhari, A. Yoshikawa, Three Different Episodes of Prompt Equatorial Electric Field Perturbations Under Steady Southward IMF Bz During St. Patrick's Day Storm, Journal of Geophysical Research: Space Physics,124,12,2019,10428-10443,doi:10.1029/2019JA027069
Obana, Y., N. Maruyama, A. Shinbori, K. K. Hashimoto, M. Fedrizzi, M. Nose, Y. Otsuka, N. Nishitani, T. Hori, A. Kumamoto, F. Tsuchiya, S. Matsuda, A. Matsuoka, Y. Kasahara, A. Yoshikawa, Y. Miyoshi, I. Shinohara, A Severe Erosion of the Plasmasphere Arising from the September 2017 Storm, AGU Fall Meeting Abstracts,2019
Gang Chen, Yaxian Li, Shaodong Zhang, Baiqi Ning, Wanlin Gong, A. Yoshikawa, Kornyanat Hozumi, T. Tsugawa, Zhihua Wang, Multi-Instrument Observations of the Atmospheric and Ionospheric Response to the 2013 Sudden Stratospheric Warming Over Eastern Asia Region, IEEE Transactions on Geoscience and Remote Sensing,58,2,2019,1232-1243,doi:10.1109/TGRS.2019.2944677
Khairul Adib Yusof, Nurul Shazana Abdul Hamid, Mardina Abdullah, Suaidi Ahadi, A. Yoshikawa, Assessment of signal processing methods for geomagnetic precursor of the 2012 M6. 9 Visayas, Philippines earthquake,Acta Geophysica,67,5,2019,1297-1306,doi:10.1007/s11600-019-00319-w
M. Abbas, Zamri Zainal Abidin, M. H. Jusoh, O. S. Bolaji, A. Yoshikawa, Features of horizontal magnetic field intensity over northern island of Malaysia, Indian Journal of Physics,93,10,2019,1247-1257,doi:10.1007/s12648-019-01388-9
Zamri Zainal Abidin, M. H. Jusoh, M. Abbas, A. Yoshikawa, Application of solar quiet (Sq) current in determining mantle conductivity-depth structure in Malaysia, Journal of Atmospheric and Solar-Terrestrial Physics,192,2019,104776,doi:10.1016/j.jastp.2018.01.019
Zamri Zainal Abidin, M. H. Jusoh, M. Abbas, O. S. Bolaji, A. Yoshikawa, Features of the inter-hemispheric field-aligned current system over Malaysia ionosphere, Journal of Atmospheric and Solar-Terrestrial Physics,192,2019,104769,doi:10.1016/j.jastp.2018.01.012
Nakamizo, A., A. Yoshikawa, Deformation of ionospheric potential pattern by ionospheric Hall polarization, Journal of Geophysical Research: Space Physics,124,9,2019,7553-7580,doi:10.1029/2018JA026013
Charles Owolabi, Jiuhou Lei, O. S. Bolaji, Oluwaseyi Jimoh, Haibing Ruan, Na Li, Xiaojuan Niu, A. Yoshikawa, Investigation on the variability of the geomagnetic daily current during sudden stratospheric warmings, Journal of Geophysical Research: Space Physics,124,7,2019,6156-6172,10.1029/2019JA026667
Norhani Muhammad Nasir Annadurai, Nurul Shazana Abdul Hamid, A. Yoshikawa, Statistical study of equatorial geomagnetic crochets, AIP Conference Proceedings,2111,1,2019,030003,doi:10.1063/1.5111233
Wan Nur Izzaty Ismail, Nurul Shazana Abdul Hamid, Mardina Abdullah, A. Yoshikawa, Longitudinal profile of equatorial electrojet derived from ground and satellite based magnetometers, AIP Conference Proceedings,2111,1,2019,030002,doi:10.1063/1.5111232
Obana, Y, N. Maruyama, A. Shinbori, K. K. Hashimoto, Mariangel Fedrizzi, M. Nosé, Y. Otsuka, N. Nishitani, T. Hori, A. Kumamoto, F. Tsuchiya, S. Matsuda, A. Matsuoka, Y. Kasahara, A. Yoshikawa, Y. Miyoshi, I. Shinohara, Response of the ionosphere‐plasmasphere coupling to the September 2017 storm: What erodes the plasmasphere so severely?, Space Weather,17,6,2019,861-876,doi:10.1029/2019SW002168
R. A. Marshall, L. Wang, G. A. Paskos, G. Olivares‐Pulido, T. Van Der Walt, C. Ong, D. Mikkelsen, G. Hesse, B. McMahon, E. Van Wyk, G. Ivanovich, D. Spoor, C. Taylor, A. Yoshikawa, Modeling geomagnetically induced currents in Australian power networks using different conductivity models, Space Weather,17,5,2019,727-756,doi:10.1029/2018SW002047
Mitani, K., K. Seki, K. Keika, M. Gkioulidou, L. J. Lanzerotti, D. G. Mitchell, C. A. Kletzing, A. Yoshikawa, Y. Obana, Statistical study of selective oxygen increase in high‐energy ring current ions during magnetic storms, Journal of Geophysical Research: Space Physics,124,5,2019,3193-3209,doi:10.1029/2018JA026168
R. Umar, S. F. Natasha, S. S. N. Aminah, K. N. Juhari, M. H. Jusoh, N. S. A. Hamid, M. H. Hashim, Z. M. Radzi, A. N. Ishak, S. N. Hazmin, W. Z. A. W. Mokhtar, M. K. A. Kamarudin, H. Juahir, A. Yoshikawa, Magnetic Data Acquisition System (MAGDAS) Malaysia: installation and preliminary data analysis at ESERI, UNISZA, Indian Journal of Physics,93,5,2019,553-564,doi:10.1007/s12648-018-1318-x
Soares, G., Y. Yamazaki, J. Matzka, K. Pinheiro, C. Stolle, P. Alken, A. Yoshikawa, T. Uozumi, A. Fujimoto, A. Kulkarni, Longitudinal variability of the equatorial counter electrojet during the solar cycle 24, Studia Geophysica et Geodaetica,63,2,2019,304-319,doi:10.1007/s11200-018-0286-0
S. A. Bello, M. Abdullah, N. S. Abdul Hamid, B. W. Reinisch, A. Yoshikawa, A. Fujimoto, Response of ionospheric profile parameters to equatorial electrojet over Peruvian station, Earth and Space Science,6,4,2019,617-628,doi:10.1029/2018EA000537
W. N. I. Ismail, N. S. A. Hamid, M. Abdullah, N. H. M. Shukur, A. Yoshikawa, Variation of equatorial electrojet current profiles over Solar Phases, ASM Science Journal,12,Special Issue 2,2019,125-133,doi:10.1088/1742-6596/852/1/012019
Fujimoto, A., A. Yoshikawa, T. Uozumi, S. Abe, Seasonal dependence of semidiurnal equatorial magnetic variation during quiet and disturbed periods, E3S Web of Conferences,127,2019,02025,doi:10.1051/e3sconf/201912702025
Zatul Iffah Abd Latiff, Mohamad Huzaimy Jusoh, Farah Adilah Mohd Kasran, Siti Amalina Enche Ab Rahim, Munirah Onn, Aznilinda Zainuddin, Muhammad Asraf Hairuddin, Nurhani Kasuan, Muhammad Muzamil Mustam, Suhana Mohamed, Yoshikawa Akimasa, The first solar-powered Magdas-9 installation and possible geomagnetically induced currents study at Johor, Malaysia, Journal of Physics: Conference Series,1152,1,2019,012030,doi:10.1088/1742-6596/1152/1/012030
Nakahara, M., A. Yoshikawa, T. Uozumi, A. Fujimoto, Electromagnetic induction responses to geomagnetic disturbances at low-and-mid-latitudes, Journal of Physics: Conference Series,1152,1,2019,012035,doi:10.1088/1742-6596/1152/1/012035
Siti Nurbaiti Ibrahim, Mohammad Huzaimy Jusoh, Ahmad Asari Sulaiman, Akimasa Yoshikawa, Zahira Mohd Radzi, Characteristic of the Disturbed Days Ionospheric Current System in the 180-Degree Magnetic Meridian, Journal of Physics: Conference Series,1152,1,2019,012029,doi:10.1088/1742-6596/1152/1/012029
Akiyama, T., A. Yoshikawa, A. Fujimoto, T. Uozumi, Relationship between plasma bubble and ionospheric current, equatorial electrojet, and equatorial counter electrojet, Journal of Physics: Conference Series,1152,1,2019,012022,doi:10.1088/1742-6596/1152/1/012022
N. Mohd Anuar, F. A. Mohd Kasran, M. Abbas, M. H. Jusoh, S. A. Enche Ab Rahim, N. Abdul Hadi, A. Yoshikawa, Z. Mohd Radzi, Assessment of the Geomagnetically Induced Current (GIC) at Low Latitude Region based on MAGDAS Data, Journal of Physics: Conference Series,1152,1,2019,012028,doi:10.1088/1742-6596/1152/1/012028
E. M. Takla, A. Khashaba, M. Abdel Zaher, A. Yoshikawa, T. Uozumi, Anomalous ultra low frequency signals possibly linked with seismic activities in Sumatra, Indonesia, NRIAG Journal of Astronomy and Geophysics,7,2,2018,247-252,doi:10.1016/j.nrjag.2018.04.004
Seki, K., Y. Miyoshi, Y. Ebihara, Y. Katoh, T. Amano, S. Saito, M. Shoji, A. Nakamizo, K. Keika, T. Hori, S. Nakano, S. Watanabe, K. Kamiya, N. Takahashi, Y. Omura, M. Nose, M. C. Fok, T. Tanaka, A. Ieda, A. Yoshikawa, Theory, modeling, and integrated studies in the Arase (ERG) project, Earth, Planets and Space,70,1,2018,1-28,doi:10.1186/s40623-018-0785-9
S. Ohtani, T. Motoba, J. W. Gjerloev, J. M. Ruohoniemi, E. F. Donovan, A. Yoshikawa, Longitudinal development of poleward boundary intensifications (PBIs) of auroral emission, Journal of Geophysical Research: Space Physics, 123,11,2018,9005-9021,doi:10.1029/2017JA024375
Nornabilah Mohd Anuar, Farah Adilah Mohd Kasran, Zatul Iffah Abdul Latif, Siti Amalina Ence Ab Rahim, Arif Manut, Mohamad Huzaimy Jusoh, Normi Abdul Hadi, Akimasa Yoshikawa, Estimation of time derivative of horizontal geomagnetic component for GIC assesment in Malaysia during quiet period, 2018 IEEE 8th International Conference on System Engineering and Technology (ICSET),2018,118-122,doi:10.1109/ICSEngT.2018.8606390
N. M. N. Annadurai, N. S. A. Hamid, Y. Yamazaki, A. Yoshikawa, Investigation of unusual solar flare effect on the global ionospheric current system, Journal of Geophysical Research: Space Physics,123,10,2018,8599-8609,10.1029/2018JA025601
Takahashi, N., K. Seki, M. Teramoto, M. C. Fok, Y. Zheng, A. Matsuoka, N. Higashio, K. Shiokawa, D. Baishev, A. Yoshikawa, T. Nagatsuma, Global distribution of ULF waves during magnetic storms: Comparison of Arase, ground observations, and BATSRUS+ CRCM simulation, Geophysical Research Letters,45,18,2018,9390-9397,doi:10.1029/2018GL078857
N. S. A. Hamid, Viksuthorn Ai Wen, Nur Izzati Mohd Rosli, A. Yoshikawa, Perubahan Sistem Arus Ionosfera di Kawasan Asia Tenggara semasa Ribut Geomagnet pada Fasa Suria Minimum, Sains Malaysiana,47,8,2018,1923-1929,
N. S. A. Hamid, Viksuthorn Ai Wen, Nur Izzati Mohd Rosli, A. Yoshikawa, Changes in Ionospheric Currents System at Southeast Asia Region during Geomagnetic Storm in Solar's Minimum Phase, SAINS MALAYSIANA,47,8,2018,1923-1929
Shi, R., Binbin Ni, Danny Summers, H. Liu, A. Yoshikawa, Beichen Zhang, Generation of electron acoustic waves in the topside ionosphere from coupling with kinetic Alfven waves: A new electron energization mechanism, Geophysical Research Letters,45,11,2018,5299-5304,doi:10.1029/2018GL077898
Yoshikawa, A., R. Fujii, Earth’s ionosphere: theory and phenomenology of Cowling channels, Electric Currents in Geospace and Beyond,235,2018,427-443,doi:10.1002/9781119324522.ch25
N. M. N. Annadurai, N. S. A. Hamid, A. Yoshikawa, Observation of Ionospheric Current during Strong Solar Flare Using Ground Based Magnetometer, SAINS MALAYSIANA,47,3,2018,595-601
Terada, K., C. Tao, N. Terada, Y. Kasaba, H. Kita, A. Nakamizo, A. Yoshikawa, S. Ohtani, F. Tsuchiya, M. Kagitani, T. Sakanoi, G. Murakami, K. Yoshioka, T. Kimura, A. Yamazaki, I. Yoshikawa, Study of the Solar Wind Influence on the Jovian Inner Magnetosphere Using an Ionospheric Potential Solver, Lunar and Planetary Science Conference,2018
Terada, K., C. Tao, N. Terada, Y. Kasaba, H. Kita, A. Nakamizo, A. Yoshikawa, S. Ohtani, F. Tsuchiya, M. Kagitani, T. Sakanoi, G. Murakami, K. Yoshioka, T. Kimura, A. Yamazaki, I. Yoshikawa, Study of the Jovian magnetosphere-ionosphere coupling using an ionospheric potential solver: Contributions of H+ and meteoric ions to ionospheric conductivity
E. M. Takla, A. Yoshikawa, T. Uozumi, A Possible Influence of Seismic Activity on Diurnal Geomagnetic Variations, Journal of Geology and Geophysics,7,6,2018,100451,doi:10.4172/2381-8719.1000451
Fujimoto, A., A. Yoshikawa, A. Ikeda, Global response of Magnetic field and Ionosonde observations to intense solar flares on 6 and 10 September 2017, E3S Web of Conferences,62,2018,01007,10.1051/e3sconf/20186201007
Ikeda, A., T. Uozumi, A. Yoshikawa, A. Fujimoto, S. Abe, Schumann resonance parameters at Kuju station during solar flares, E3S Web of Conferences,62,2018,01012,doi:10.1051/e3sconf/20186201012
Farah Adilah Mohd Kasran, M. H. Jusoh, A. Yoshikawa, Zahira Mohd Radzi, The Time Derivative of the Horizontal Geomagnetic Field for the Low Latitude MAGDAS Langkawi Station for the Estimation of Geomagnetically Induced Current, Space Science and Communication for Sustainability,2018,57-71,doi:10.1007/978-981-10-6574-3_6
Nadezda V. Yagova, Balazs Heilig, Vyacheslav A. Pilipenko, A. Yoshikawa, Nataliya S. Nosikova, K. Yumoto, Jan Reda, Nighttime Pc3 pulsations: MM100 and MAGDAS observations, Earth, Planets and Space,69,1,2017,1-17,doi:10.1186/s40623-017-0647-x
Imajo, S., A. Yoshikawa, T. Uozumi, S. Ohtani, A. Nakamizo, Peter J. Chi, Application of a global magnetospheric‐ionospheric current model for dayside and terminator Pi2 pulsations, Journal of Geophysical Research: Space Physics,122,8,2017,8589-8603,doi:10.1002/2017JA024246
S. A. Bello, M. Abdullah, N. S. A. Hamid, A. Yoshikawa, A. O. Olawepo, Variations of B0 and B1 with the solar quiet Sq-current system and comparison with IRI-2012 model at Ilorin, Advances in Space Research,60,2,2017,307-316,doi:10.1016/j.asr.2017.02.003
Ericson López, Franklin Aldás, A. Yoshikawa, Analysis of Magnetic Field Variations Produced by Equatorial Electro-Jets,Proceedings of the International Astronomical Union,13,S335,2017,125-127,doi:10.1017/S1743921318000662
R. A. Marshall, A. Kelly, T. Van Der Walt, A. Honecker, C. Ong, D. Mikkelsen, A. Spierings, G. Ivanovich, A. Yoshikawa, Modeling geomagnetic induced currents in Australian power networks, Space Weather,15,7,2017,895-916,doi:10.1002/2017SW001613
W. N. I. Ismail, N. S. A. Hamid, M. Abdullah, A. Yoshikawa, T. Uozumi, Longitudinal Variation of EEJ Current during Different Phases of Solar Cycle, Journal of Physics: Conference Series,852,1,2017,012019,doi:10.1088/1742-6596/852/1/012019
N. S. A. Hamid, H. Liu, T. Uozumi, A. Yoshikawa, N. M. N. Annadurai, Peak time of equatorial electrojet from different longitude sectors during fall solar minimum, Journal of Physics: Conference Series,852,1,2017,012015,
Debrup Hui, D. Chakrabarty, R. Sekar, Geoffrey D. Reeves, A. Yoshikawa, K. Shiokawa, Contribution of storm time substorms to the prompt electric field disturbances in the equatorial ionosphere,Journal of Geophysical Research: Space Physics,122,5,2017,5568-5578,doi:10.1002/2016JA023754
A. Babatunde Rabiu, Olanike Olufunmilayo Folarin, T. Uozumi, N. S. A. Hamid, A. Yoshikawa, Longitudinal variation of equatorial electrojet and the occurrence of its counter electrojet, Annales Geophysicae,35,3,2017,535-545,doi:10.5194/angeo-35-535-2017
XiaoHua Mo, DongHe Zhang, Larisa Goncharenko, ShunRong Zhang, YongQiang Hao, Zuo Xiao, JiaZheng Pei, Akimasa Yoshikawa, HaDuyen Chau, Meridional movement of northern and southern equatorial ionization anomaly crests in the East-Asian sector during 2002–2003 SSW, Science China Earth Sciences,60,4,2017,776-785,doi:10.1007/s11430-016-0096-y
Abe, S., T. Hanada, A. Yoshikawa, T. Hirai, S. Kawamoto, Long-term forecasts of space debris environment associated with space weather activities, JAXA Special Publication: Proceedings of the 7th Space Debris Workshop,2017,557-558
G. Q. Wang, M. Volwerk, T. L. Zhang, D. Schmid, A. Yoshikawa, High‐latitude Pi2 pulsations associated with kink‐like neutral sheet oscillations, Journal of Geophysical Research: Space Physics,122,3,2017,2889-2899,doi:10.1002/2016JA023370
N. S. A. Hamid, Wan Nur Izzaty Ismail, A. Yoshikawa, Longitudinal Profile of the Equatorial Electrojet Current and Its Dependence on Solar Activity, Advanced Science Letters,23,2,2017,1357-1360,doi:10.1166/asl.2017.8372
N. S. A. Hamid, Wan Nur Izzaty Ismail, A. Yoshikawa, Latitudinal Variation of Ionospheric Currents in Southeast Asian Sector, Advanced Science Letters,23,2,2017,1444-1447,doi:10.1166/asl.2017.8358
Fujita, K., Y. Itaya, T. Hanada, A. Yoshikawa, H. Yamaoka, T. Ynagisawa, H. Matsumoto, H. kamiya, Y. Kitazawa, Y. Ogawa, An Identification of Space Debris Utilizing EISCAT Radar Observation, 宇宙科学技術連合講演会講演集 (CD-ROM),61,2017,11
Ikeda, A., T. Uozumi, A. Yoshikawa, A. Fujimoto, S. Abe, H. Nozawa, M. Shinohara, Characteristics of Schumann Resonance Parameters at Kuju Station, E3S Web of Conferences,20,2017,01004,doi:10.1051/e3sconf/20172001004
Yoshikawa, A., A. Fujimoto, A. Ikeda, T. Uozumi, S. Abe, Monitoring of Space and Earth electromagnetic environment by MAGDAS project: Collaboration with IKIR-Introduction to ICSWSE/MAGDAS project, E3S Web of Conferences,20,2017,doi:10.1051/e3sconf/20172001013
D. G. Baishev, S. N. Samsonov, A. V. Moiseev, R. N. Boroyev, A. E. Stepanov, V. I. Kozlov, A. A. Korsakov, A. A. Toropov, A. Yoshikawa, K/ Yumoto, Monitoring and investigating space weather effects with meridional chain of instruments in Yakutia: a brief overview, Solar-Terrestrial Physics,3,2,2017,25-33,doi:10.12737/22607
Aleksey Moiseev, Dmitry Baishev, Vladimir Mishin, T. Uozumi, A. Yoshikawa, A. Du, FEATURES OF FORMATION OF SMALL-SCALE WAVE DISTURBANCES DURING A SUDDEN MAGNETOSPHEREIC COMPRESSION, Solar-Terrestrial Physics,3,2,2017,34-42,doi:10.12737/22606
Siti Nurbaiti Ibrahim, M. H. Jusoh, Ahmad Asari Sulaiman, Siti Noor Aisyah Ahmad, Mohd Zul Hilmey Makmud, Baba Musta, Mardina Abdullah, Mhd Fairos Asillam, Nyanasegari Bhoo, M. H. Pathy, A. Yoshikawa, First geomagnetic observation at sabah, malaysia by using MAGDAS array, International Journal of Simulation: Systems, Science & Technology,17,41,2017,30.1-30.8,doi:10.5013/IJSSST.a.17.41.30
A. Babatunde Rabiu, Olanike O. Folarin, T. Uozumi, A. Yoshikawa, Simultaneity and asymmetry in the occurrence of counterequatorial electrojet along African longitudes, Geophysical Monograph Series,220,2017,21-31,doi:10.1002/9781118929216.ch2
Nishimura, Y., T. Kikuchi, Y. Ebihara, A. Yoshikawa, S. Imajo, W. Li, H. Utada, Evolution of the current system during solar wind pressure pulses based on aurora and magnetometer observations, Earth, Planets and Space,68,1,2016,144,doi:10.1186/s40623-016-0517-y
Imajo, S., A. Yoshikawa, T. Uozumi, S. Ohtani, A. Nakamizo, S. Demberel, B. M. Shevtsov, Solar terminator effects on middle-to low-latitude Pi2 pulsations, Earth, Planets and Space,68,1,2016,137,doi:10.1186/s40623-016-0514-1
Ohtani, S., A. Yoshikawa, The initiation of the poleward boundary intensification of auroral emission by fast polar cap flows: A new interpretation based on ionospheric polarization, Journal of Geophysical Research: Space Physics,121,11, 10,910-10,928,doi:10.1002/2016JA023143
Takahashi, K., Michael D. Hartinger, David M. Malaspina, Charles W. Smith, K. Koga, Howard J. Singer, Dennis Frühauff, Dmitry G. Baishev, Alexey V. Moiseev, A. Yoshikawa, Propagation of ULF waves from the upstream region to the midnight sector of the inner magnetosphere, Journal of Geophysical Research: Space Physics,121,9,2016,8428-8447,doi:10.1002/2016JA022958
Tsuda, T., M. Yamamoto, H. Hashiguchi, K. Shiokawa, Y. Ogawa, S. Nozawa, H. Miyaoka, A. Yoshikawa, A proposal on the study of solar‐terrestrial coupling processes with atmospheric radars and ground‐based observation network, Radio Science,51,9,2016,1587-1599,doi:10.1002/2016RS006035
O. S. Bolaji, E. O. Oyeyemi, O. P. Owolabi, Y. Yamazaki, A. B. Rabiu, D. Okoh, A. Fujimoto, Christine Amory‐Mazaudier, Gopi K. Seemala, A. Yoshikawa, O. K. Onanuga, Solar quiet current response in the African sector due to a 2009 sudden stratospheric warming event, Journal of Geophysical Research: Space Physics,121,8,2016,8055-8065,doi:10.1002/2016JA022857
Uozumi, T., A. Yoshikawa, S. Ohtani, S. Imajo, D. G. Baishev, A. V. Moiseev, K. Yumoto, Initial deflection of middle‐latitude Pi2 pulsations in the premidnight sector: Remote detection of oscillatory upward field‐aligned current at substorm onset, Journal of Geophysical Research: Space Physics,121,7,2016,6324-6340,doi:10.1002/2015JA021698
Susanta Kumar Bisoi, D. Chakrabarty, P. Janardhan, R. G. Rastogi, A. Yoshikawa, K. Fujiki, M. Tokumaru, Y. Yan, The prolonged southward IMF‐Bz event of 2–4 May 1998: Solar, interplanetary causes and geomagnetic consequences, Journal of Geophysical Research: Space Physics,121,5,2016,3882-3904,doi:10.1002/2015JA022185
Fujimoto, A., T. Uozumi, S. Abe, H. Matsushita, S. Imajo, Jose K. Ishitsuka, A. Yoshikawa, Long-term EEJ variations by using the improved EE-index, Sun and Geosphere,11,1,2016,37-47,link
Jusoh Mohamad Huzaimy, Mohd Kasran Farah Adilah, Ahmad Siti Noor Aisyah, H. Liu, K. Yumoto, Mhd Fairos Asillam, N. B. Pathy, A. Yoshikawa, Possible relationship between exogenous parameters and seismicity: Ultra-Low Frequency (ULF) of Magnetic Pulsation, Pc, Sun and Geosphere,10,2,2015,127-132,link
Nurul Shazana Abdul Hamid, H. Liu, T. Uozumi, A. Yoshikawa, Empirical model of equatorial electrojet based on ground-based magnetometer data during solar minimum in fall, Earth, planets and space,67,1,2015,205,doi:10.1186/s40623-015-0373-1
Bitap Raj Kalita, Pradip Kumar Bhuyan, A. Yoshikawa, NmF2 and hmF2 measurements at 95° E and 127° E around the EIA northern crest during 2010–2014, Earth, Planets and Space,67,1,2015,186,doi:10.1186/s40623-015-0355-3
Tanaka, Y., Y. Ogawa, A. Kadokura, N. Partamies, D. Whiter, C.-F. Enell, U. Brändström, T. Sergienko, B. Gustavsson, A. Kozlovsky, H. Miyaoka, A. Yoshikawa, Eastward-expanding auroral surges observed in the post-midnight sector during a multiple-onset substorm, Earth, Planets and Space,67,1,2015,182,doi:10.1186/s40623-015-0350-8
Takla, E. M., H. Odah, E. M. Abd Elaal, A. Yoshikawa, H. Kawano, T. Uozumi, The 2011 eruption of Aso volcano, Japan, and its signature on the geomagnetic field measurements, Arabian Journal of Geosciences,8,10,2015,8497-8503,doi:10.1007/s12517-015-1858-8
S. N. A. Ahmad, M. H. Jusoh, F. A. M. Kasran, M. Abdullah, B. Veenadhari, T. Uozumi, S. Abe, A. Yoshikawa, M. G. Cardinal, Variations of ULF and VLF during moderate geomagnetic storm at equatorial region, 2015 International Conference on Space Science and Communication (IconSpace),2015,256-261,doi:10.1109/IconSpace.2015.7283762
N. S. A. Hamid, H. Liu, T. Uozumi, G. K. Gopir, H. A. Hadin, A. Yoshikawa, Longitudinal and solar activity dependence of equatorial electrojet at Southeast Asian sector, 2015 International Conference on Space Science and Communication (IconSpace),2015,262-266,doi:10.1109/IconSpace.2015.7283763
Uzziel Perez, Angeleene S. Ang, Quirino M. Sugon Jr, Daniel J. McNamara, A. Yoshikawa, Lorentz Dispersion Law from classical Hydrogen electron orbits in AC electric field via geometric algebra, arXive,2015,link
Moiseyev, A. V., V. I. Popov, V. A. Mullayarov, S. N. Samsonov, A. Du, A. Yoshikawa, Generation of different long-period geomagnetic pulsations during a sudden impulse, Cosmic Research,53,4,2015,257-266,doi:10.1134/S001095251504005X
Bolaji, O. S., A. B. Rabiu, O. R. Bello, A. Yoshikawa, K. Yumoto, O. O. Odeyemi, O. Ogunmodimu, Spatial variability of solar quiet fields along 96 magnetic meridian in Africa: results from MAGDAS, Journal of Geophysical Research: Space Physics,120,5,2015,3883-3898,doi:10.1002/2014JA020728
Hori, T., Y. Miyashita, Y. Miyoshi, K. Seki, T. Segawa, Y. Tanaka, K. Keika, M. Shoji, I. Shinohara, K. Shiokawa, Y. Otsuka, S. Abe, A. Yoshikawa, K. Yumoto, Y. Obana, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, M. Kunitake, K. Hosokawa, Y. Ogawa, K. T. Murata, M. Nose, H. Kawano, T. Sakanoi, CDF data archive and integrated data analysis platform for ERG-related ground data developed by ERG Science Center (ERG-SC), JAXA Research and Development Report: Journal of Space Science Informatics Japan,4,2015,75-89,link
Bolaji, O. S., E. O. Oyeyemi, P. R. Fagundes, A. J. de Abreu, R. de Jesus, A. B. Rabiu, A. Yoshikawa, Counter electrojet events using Ilorin observations during a low solar activity period, The African Review of Physics,9,2015,link
Imajo, S., A. Yoshikawa, T. Uozumi, S. Ohtani, A. Nakamizo, R. Marshall, B. M. Shevtsov, V. A. Akulichev, U. Sukhbaatar, A. Liedloff, K. Yumoto, Pi2 pulsations observed around the dawn terminator, Journal of Geophysical Research: Space Physics,120,3,2015,2088-2098,doi:10.1002/2013JA019691
Cuturrufo, F., V. Pilipenko, B. Heilig, M. Stepanova, H. Lühr, P. Vega, A. Yoshikawa, Near-equatorial Pi2 and Pc3 waves observed by CHAMP and on SAMBA/MAGDAS stations, Advances in Space Research,55,4,2015,1180-1189,doi:10.1016/j.asr.2014.11.010
Baishev, D. G., A. V. Moiseyev, R. N. Boroyev, S. E. Kobyakova, A. E. Stepanov, O. V. Mandrikova, I. S. Solovev, S. Yu Khomutov, Yu A. Polozov, A. Yoshikawa, K. Yumoto, Magnetic and ionospheric observations in the Far Eastern region of Russia during the magnetic storm of 5 April 2010, Sun and Geosphere,10,2,2015,133-140,link
Wang, G. Q., M. Volwerk, R. Nakamura, P. Boakes, T. L. Zhang, A. Yoshikawa, D. G. Baishev, Flapping current sheet with superposed waves seen in space and on the ground, Journal of Geophysical Research: Space Physics,119,12,2014,10,078-10,091,doi:10.1002/2014JA020526
Ieda, A., S. Oyama, H. Vanhamäki, R. Fujii, A. Nakamizo, O. Amm, T. Hori, M. Takeda, G. Ueno, A. Yoshikawa, R. J. Redmon, W. F. Denig, Y. Kamide, N. Nishitani, Approximate forms of daytime ionospheric conductance, Journal of Geophysical Research: Space Physics,119,12,2014,10,397-10,415,doi:10.1002/2014JA020665
Nurul Shazana Abdul Hamid, H. Liu, T. Uozumi, K. Yumoto, B. Veenadhari, A. Yoshikawa, Jairo Avendaño Sanchez, Relationship between the equatorial electrojet and global Sq currents at the dip equator region, Earth, Planets and Space,66,1,2014,146,doi:10.1186/s40623-014-0146-2
Takla, E. M., A. Yoshikawa, H. Kawano, T. Uozumi, S. Abe, Anomalous geomagnetic variations associated with the volcanic activity of the Mayon volcano, Philippines during 2009–2010, NRIAG Journal of Astronomy and Geophysics,3,2,2014,130-136,doi:10.1016/j.nrjag.2014.09.001
Imajo, S., K. Yumoto, T. Uozumi, H. Kawano, S. Abe, A. Ikeda, K. Koga, H. Matsumoto, T. Obara, R. Marshall, V. A. Akulichev, A. Mahrous, A. Liedloff, A. Yoshikawa, Analysis of propagation delays of compressional Pi 2 waves between geosynchronous altitude and low latitudes, Earth, Planets and Space,66,1,2014,20,doi:10.1186/1880-5981-66-20
Cardinal, M. G., A. Yoshikawa, H. Kawano, H. Liu, M. Watanabe, S. Abe, T. Uozumi, G. Maeda, T. Hada, K. Yumoto, Capacity building: A tool for advancing space weather science, Space Weather,12,10,2014,571-576,doi:10.1002/2014SW001110
Liu, J., L. Liu, T. Nakamura, B. Zhao, B. Ning, A. Yoshikawa, A case study of ionospheric storm effects during long‐lasting southward IMF Bz‐driven geomagnetic storm, Journal of Geophysical Research: Space Physics,119,9,2014,7716-7731,doi:10.1002/2014JA020273
Teramoto, M., N. Nishitani, V. Pilipenko, T. Ogawa, K. Shiokawa, T. Nagatsuma, A. Yoshikawa, D. Baishev, K. T. Murata, Pi2 pulsation simultaneously observed in the E and F region ionosphere with the SuperDARN Hokkaido radar, Journal of Geophysical Research: Space Physics,119,5,2014,3444-3462,doi:10.1002/2012JA018585
Yamazaki, Y., A. D. Richmond, A. Maute, Q. Wu, D. A. Ortland, A. Yoshikawa, I. A. Adimula, B. Rabiu, M. Kunitake, T. Tsugawa, Ground magnetic effects of the equatorial electrojet simulated by the TIE‐GCM driven by TIMED satellite data, Journal of Geophysical Research: Space Physics,119,4,2014,3150-3161,doi:10.1002/2013JA019487
L. Muhammad K. Musafar, W. Sugitomo, T. Djamaluddin, A. Yoshikawa, T. Uozumi, Pc5 magnetic pulsations during the outer electron radiation belt, International Journal of Technology,5,3,2014,269-276,doi:10.14716%2Fijtech.v5i3.612
Hanada, T., H. Matsumoto, A. Yoshikawa, T. Yanagisawa, Y. Kitazawa, Optical and In-situ Debris Measurements under Collaboration with Space Weather Science and Education, 40th COSPAR Scientific Assembly,2014
Siti Noor Aisyah Ahmad, Mohamad Huzaimy Jusoh, Khairul Khaizi Mohd Shariff, Mardina Abdullah, Mhd Fairos Asillam, B. Veenadhari, T. Uozumi, S. Abe, A. Yoshikawa, M. G. Cardinal, Data processing method to classify Pc5 ULF pulsations due to solar wind perturbations at equatorial region, WSEAS Transactions on Signal Processing,10,1,2014,337-344
Marcielow Callelero, Perkins Jon Ong, Renante Violanda, T. Uozumi, K. Yumoto, A. Yoshikawa, Alfonso Albano, Daniel McNamara, Quirino Sugon, Roland Emerito Otadoy, MAGDAS Group, Investigation on the influence of the interplanetary magnetic field on the equatorial electrojet using mutual information and transfer entropy, Proceedings of the Samahang Pisika ng Pilipinas,2013,link
Yoshikawa, A., O. Amm, H. Vanhamäki, R. Fujii, Illustration of Cowling channel coupling to the shear Alfven wave, Journal of Geophysical Research: Space Physics,118,10,2013,6405-6415,doi:10.1002/jgra.50513
Yoshikawa, A., O. Amm, H. Vanhamäki, A. Nakamizo, R. Fujii, Theory of Cowling channel formation by reflection of shear Alfven waves from the auroral ionosphere, Journal of Geophysical Research: Space Physics,118,10,2013,6416-6425,doi:10.1002/jgra.50514
Magdi E. Yousif Suliman, A. Yoshikawa, K. Yumoto, H. Kawano, T. Uozumi, S. Abe, M. G. Cardinal, Paolo Palangio, Lynn Kaisan, The relation between amplitudes of a global-mode Pc 5 pulsations and geosynchronous electron fluxes, IEEE International Conference on Space Science and Communication (IconSpace),2013,doi:10.1109/IconSpace.2013.6599453
Ohtani, S., T. Uozumi, H. Kawano, A. Yoshikawa, H. Utada, T. Nagatsuma, K. Yumoto, The response of the dayside equatorial electrojet to step‐like changes of IMF BZ, Journal of Geophysical Research: Space Physics,118,6,2013,3637-3646,doi:10.1002/jgra.50318
Shi, R., H. Liu, A. Yoshikawa, B. Zhang, B. Ni, Coupling of electrons and inertial Alfven waves in the topside ionosphere, Journal of Geophysical Research: Space Physics,118,6,2903-2910,doi:10.1002/jgra.50355
Amm, O., R. Fujii, H. Vanhamäki, A. Yoshikawa, A. Ieda, General solution for calculating polarization electric fields in the auroral ionosphere and application examples, Journal of Geophysical Research: Space Physics,118,5,2428-2437,doi:10.1002/jgra.50254
Yoshikawa, A., A. Nakamizo, S. Ohtani, Current Closure from Polar to Equatorial Ionosphere via Cowling Channel, EGU General Assembly Conference Abstracts,2013
Fujii, R., O. Amm, H. Vanhamäki, A. Yoshikawa, A. Ieda, An application of the finite length Cowling channel model to auroral arcs with longitudinal variations, Journal of Geophysical Research: Space Physics,117,A11217,2012,doi:10.1029/2012JA017953
Tanaka, Y.-M., Y. Ebihara, S. Saita, A. Yoshikawa, Y. Obana, A. T. Weatherwax, Poleward moving auroral arcs observed at the South Pole Station and the interpretation by field line resonances, Journal of Geophysical Research: Space Physics,117,2012,A09305,doi:10.1029/2012JA017899
Vanhamäki, H., A. Yoshikawa, O. Amm, R. Fujii, Ionospheric Joule heating and Poynting flux in quasi‐static approximation, Journal of Geophysical Research: Space Physics,117,2012,A08327,doi:10.1029/2012JA017841
Tokunaga, T., D. Ikeda, K. Nakamura, T. Higuchi, A. Yoshikawa, T. Uozumi, A. Fujimoto, A. Morioka, K. Yumoto, T. Higashimita, Onset time determination of precursory events in time series data by an extension of singular spectrum transformation, International Journal of Circuits, Systems and Signal Processing,5,1,2011,46-60,link
Yamazaki, Y., K. Yumoto, M. G. Cardinal, B. J. Fraser, P. Hattori, Y. Kakinami, J. Y. Liu, K. J. W. Lynn, R. Marshall, D. McNamara, T. Nagatsuma, V. M. Nikiforov, R. E. Otadoy, M. Ruhimat, B. M. Shevtsov, K. Shiokawa, S. Abe, T. Uozumi, A. Yoshikawa, An empirical model of the quiet daily geomagnetic field variation, Journal of Geophysical Research: Space Physics,116,2011,A10312,doi:10.1029/2011JA016487
Kawano, H., S. Ohtani, T. Uozumi, T. Tokunaga, A. Yoshikawa, K. Yumoto, E. A. Lucek, Mats André, Pi 2 waves simultaneously observed by Cluster and CPMN ground-based magnetometers near the plasmapause, Annales Geophysicae,29,9,2011,1663-1672,doi:10.5194/angeo-29-1663-2011
Yoshikawa, A., A. Nakamizo, O. Amm, H. Vanhamäki, R. Fujii, Y.‐M. Tanaka, T. Uozumi, K. Yumoto, S. Ohtani, Self‐consistent formulation for the evolution of ionospheric conductances at the ionospheric E region within the M‐I coupling scheme, Journal of Geophysical Research: Space Physics,116,2011,A09223,doi:10.1029/2011JA016449
Yoshikawa, A., O. Amm, H. Vanhamäki, R. Fujii, A self‐consistent synthesis description of magnetosphere‐ionosphere coupling and scale‐dependent auroral process using shear Alfvén wave, Journal of Geophysical Research: Space Physics,116,2011,A08218,doi:10.1029/2011JA016460
Uozumi, T., K. Yumoto, T. Tokunaga, S. I. Solovyev, B. M. Shevtsov, R. Marshall, K. Liou, S. Ohtani, S. Abe, A. Ikeda, K. Kitamura, A. Yoshikawa, H. Kawano, M. Itonaga, AKR modulation and global Pi2 oscillation, Journal of Geophysical Research: Space Physics,116,2011,A06214,doi:10.1029/2010JA016042
Tokunaga, T., K. Yumoto, T. Uozumi, A. Yoshikawa, K. Nakamura, T. Higuchi, D. Ikeda, CPMN Group, Identification of full-substorm onset from ground-magnetometer data by singular value transformation, Mem. Fac. Sci., Kyushu Univ., Ser. D, Earth & Planet. Sci,32,3,2011,63-73,doi:10.5109/19197
Amm, O., R. Fujii, K. Kauristie, A. Aikio, A. Yoshikawa, A. Ieda, H. Vanhamäki, A statistical investigation of the Cowling channel efficiency in the auroral zone, Journal of Geophysical Research: Space Physics,116,2011,A02304,doi:10.1029/2010JA015988
Fujii, R., O. Amm, A. Yoshikawa, A. Ieda, H. Vanhamäki, Reformulation and energy flow of the Cowling channel, Journal of Geophysical Research: Space Physics,116,2011,A02305,doi:10.1029/2010JA015989
Tokunaga, T., D. Ikeda, K. Nakamura, T. Higuchi, A. Yoshikawa, T. Uozumi, A. Fujimoto, A. Morioka, K. Yumoto, Detecting precursory events in time series data by an extension of singular spectrum transformation, Proceedings of the 10th WSEAS international conference on Applied computer science,2010,366-374,link
Tanaka, T., A. Nakamizo, A. Yoshikawa, S. Fujita, H. Shinagawa, H. Shimazu, T. Kikuchi, K. K. Hashimoto, Substorm convection and current system deduced from the global simulation, Journal of Geophysical Research: Space Physics,115,2010,A05220,doi:10.1029/2009JA014676
Yoshikawa, A., H. Nakata, A. Nakamizo, T. Uozumi, M. Itonaga, S. Fujita, K. Yumoto, T. Tanaka, Alfvénic‐coupling algorithm for global and dynamical magnetosphere‐ionosphere coupled system, Journal of Geophysical Research: Space Physics,115,2010,A04211,doi:10.1029/2009JA014924
Ikeda, A., K. Yumoto, T. Uozumi, M. Shinohara, K. Nozaki, A. Yoshikawa, V. V. Bychkov, B. M. Shevtsov, Phase relation between Pi2‐associated ionospheric Doppler velocity and magnetic pulsations observed at a midlatitude MAGDAS station, Journal of Geophysical Research: Space Physics,115,2010,A02215,doi:10.1029/2009JA014397
Baumjohann, W., A. Matsuoka, W. Magnes, K.-H. Glassmeier, R. Nakamura, H. Biernat, M. Delva, K. Schwingenschuh, T. Zhang, H.-U. Auster, K.-H. Fornacon, I. Richter, A. Balogh, P. Cargill, C. Carr, M. Dougherty, T. S. Horbury, E. A. Lucek, F. Tohyama, T. Takahashi, M. Tanaka, T. Nagai, H. Tsunakawa, M. Matsushima, H. Kawano, A. Yoshikawa, H. Shibuya, T. Nakagawa, M. Hoshino, Y. Tanaka, R. Kataoka, B. J. Anderson, C. T. Russell, U. Motschmann, M. Shinohara, Magnetic field investigation of Mercury's magnetosphere and the inner heliosphere by MMO/MGF, Planetary and Space Science,58,1-2,2010,279-286,doi:10.1016/j.pss.2008.05.019
Shinohara, M., A. Ikeda, A. Yoshikawa, V. V. Bychkov, B. M. Shevtsov, DP2 type electric field fluctuations observed by FM-CW HF radar network, Солнечно-земные связи и физика предвестников землетрясений,2010,222-225,link
Ikeda, A., A. Yoshikawa, M. G. Cardinal, K. Yumoto, M. Shinohara, K. Nozaki, B. M. Shevtsov, V. V. Bychkov, Q. M. Sugon Jr, D. McNamara, Ionospheric observation using FM-CW radar array, Advances in Geosciences: Volume 21: Solar Terrestrial (ST),2010,379-391,link
Yamazaki, Y., K. Yumoto, T. Uozumi, A. Yoshikawa, M. G. Cardinal, Equivalent current systems for the annual and semiannual Sq variations observed along the 210°MM CPMN stations, Journal of Geophysical Research: Space Physics,114,2010,A12320,doi:10.1029/2009JA014638
Uozumi, T., S. Abe, K. Kitamura, T. Tokunaga, A. Yoshikawa, H. Kawano, R. Marshall, R. J. Morris, B. M. Shevtsov, S. I. Solovyev, D. J. McNamara, K. Liou, S. Ohtani, M. Itonaga, K. Yumoto, Propagation characteristics of Pi 2 pulsations observed at high‐and low‐latitude MAGDAS/CPMN stations: A statistical study, Journal of Geophysical Research: Space Physics,144,A11,2009,207,doi:10.1029/2009JA014163
Yamazaki, Y., K. Yumoto, A. Yoshikawa, S. Watari, H. Utada, Characteristics of counter‐Sq SFE (SFE*) at the dip equator CPMN stations, Journal of Geophysical Research: Space Physics,114,A05,2009,306,doi:10.1029/2009JA014124
Yoshikawa, A., H. Nakata, A. Nakamizo, T. Uozumi, M. Itonaga, K. Yumoto, A new magnetosphere-ionosphere coupling scheme for temporal and global magnetospheric MHD simulations, Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and planetary sciences,32,2,2009,87-94,doi:10.5109/13529
Amm, O., A. Aruliah, Stephan C. Buchert, R. Fujii, J. W. Gjerloev, A. Ieda, T. Matsuo, C. Stolle, H. Vanhamäki, A. Yoshikawa, Towards understanding the electrodynamics of the 3-dimensional high-latitude ionosphere: present and future, Annales Geophysicae,26,12,2008,3913-3932,doi:10.5194/angeo-26-3913-2008
Uozumi, T., K. Yumoto, K. Kitamura, S. Abe, Y. Kakinami, M. Shinohara, A. Yoshikawa, H. Kawano, T. Ueno, T. Tokunaga, D. McNamara, J. K. Ishituka, S. L. G. Dutra, B. Damtie, V. Doumbia, O. Obrou, Akeem Babatunde Rabiu, I. A. Adimula, Mazlan Othman, M. Fairos, Roland E. S. Otadoy, MAGDAS Group, A new index to monitor temporal and long-term variations of the equatorial electrojet by MAGDAS/CPMN real-time data: EE-Index, Earth, Planets and Space,60,2008,785-790,doi:10.1186/BF03352828
Ikeda, A., K. Yumoto, M. Shinohara, K. Nozaki, A. Yoshikawa, A. Shinbori, SC-associated ionospheric electric fields at low latitude: FM-CW radar observation, Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and planetary sciences,32,1,2008,1-6,doi:10.5109/11811
Tanaka, Y.‐M., K. Yumoto, A. Yoshikawa, M. Itonaga, M. Shinohara, S. Takasaki, B. J. Fraser, Horizontal amplitude and phase structure of low‐latitude Pc 3 pulsations around the dawn terminator, Journal of Geophysical Research: Space Physics,112,A11308,doi:10.1029/2007JA012585
Tokunaga, T., H. Kohta, A. Yoshikawa, T. Uozumi, K. Yumoto, Global features of Pi 2 pulsations obtained by independent component analysis, Geophysical research letters,34,2007,L14106,doi:10.1029/2007GL030174
Uozumi, T., H. Kawano, A. Yoshikawa, M. Itonaga, K. Yumoto, Pi 2 source region in the magnetosphere deduced from CPMN data, Planetary and Space Science,55,6,2007,849-857,
Takasaki, S., H. Kawano, Y. Tanaka, A. Yoshikawa, M. Seto, M. Iizima, Y. Obana, N. Sato, K. Yumoto, A significant mass density increase during a large magnetic storm in October 2003 obtained by ground-based ULF observations at L≈ 1.4, Earth, Planets and Space,58,5,2006,617-622,doi:10.1186/BF03351959
Shiokawa, K., K. Seki, Y. Miyoshi, A. Ieda, T. Ono, M. Iizima, T. Nagatsuma, T. Obara, T. Takashima, K. Asamura, Y. Kasaba, A. Matsuoka, Y. Saito, H. Saito, M. Hirahara, Y. Tonegawa, F. Toyama, M. Tanaka, M. Nose, Y. Kasahara, K. Yumoto, H. Kawano, A. Yoshikawa, Y. Ebihara, A. Yukimatsu, N. Sato, S. Watanabe, ERG–A small-satellite mission to investigate the dynamics of the inner magnetosphere, Advances in Space Research,38,8,2006,1861-1869,doi:10.1016/j.asr.2005.05.089
Lysak, R. L., A. Yoshikawa, Resonant cavities and waveguides in the ionosphere and atmosphere. In Magnetospheric ULF Waves: Synthesis and New Directions,169,2006,289-306,doi:10.1029/169GM19
Obana, Y., A. Yoshikawa, John V. Olson, Ray J. Morris, Brian J. Fraser, K. Yumoto, North‐south asymmetry of the amplitude of high‐latitude Pc 3–5 pulsations: Observations at conjugate stations, Journal of Geophysical Research,110,A10214,2005,doi:10.1029/2003JA010242
Kitamura, K., H. Kawano, S. Ohtani, A. Yoshikawa, K. Yumoto, Local time distribution of low and middle latitude ground magnetic disturbances at sawtooth injections of 18–19 April 2002, Journal of Geophysical Research,110,A07208,doi:10.1029/2004JA010734
Uozumi, T., K. Yumoto, H. Kawano, A. Yoshikawa, S. Ohtani, J. V. Olson, S.‐I. Akasofu, S. I. Solovyev, E. F. Vershinin, K. Liou, C.‐I. Meng, Propagation characteristics of Pi 2 magnetic pulsations observed at ground high latitudes, Journal of Geophysical Research,109,A08203,2004,doi:10.1029/2003JA009898
Tanaka, Y.-M., K. Yumoto, A. Yoshikawa, M. Shinohara, H. Kawano, T.‐I. Kitamura, Longitudinal structure of Pc3 pulsations on the ground near the magnetic equator, Journal of Geophysical Research,109,A03201,2004,doi:10.1029/2003JA009903
Yoshikawa, A., Excitation of a Hall‐current generator by field‐aligned current closure, via an ionospheric, divergent Hall‐current, during the transient phase of magnetosphere–ionosphere coupling, Journal of Geophysical Research,107,A12,1445,2002,doi:10.1029/2001JA009170
Yoshikawa, A., Masahiro Itonaga, Kiyohumi Yumoto, On the energy of the poloidal magnetic field near the ionosphere, Advances in polar upper atmosphere research,16,2002,45-58link
Yoshikawa, A., Kiyohumi Yumoto, Manabu Shinohara, Masahiro Itonaga, Diagrammatic method to describe the self‐inductive response of the magnetosphere‐ionosphere‐atmosphere‐Earth electromagnetically coupled system as a quasi‐particle excitation, Journal of Geophysical Research,107,A5,1055,2002,doi:10.1029/2000JA000405
Yoshikawa, A., How does the ionospheric rotational Hall current absorb the increasing energy from the field‐aligned current system?, Geophysical Research Letters,29,7,2002,37-1 - 37-4,doi:10.1029/2001GL014125
Yoshikawa, A., Y. Obana, M. Shinohara, M. Itonaga, K. Yumoto, Hall‐induced inductive shielding effect on geomagnetic pulsations, Geophysical Research Letters,29,8,2002,107-1 - 107-4,doi:10.1029/2001GL013610
Fujita, S., H. Nakata, M. Itonaga, A. Yoshikawa, T. Mizuta, A numerical simulation of the Pi2 pulsations associated with the substorm current wedge, Journal of Geophysical Research,107,A3,1034,2002doi:10.1029/2001JA900137
Fujita, S., T. Mizuta, M. Itonaga, A. Yoshikawa, H. Nakata, Propagation property of transient MHD impulses in the Magnetosphere‐Ionosphere System: The 2D model of the Pi2 pulsation, Geophysical Research Letters,28,11,2001,2161-2164,doi:10.1029/2000GL000108
Itonaga, M., A. Yoshikawa, K. Yumoto, S. Fujita, H. Nakata, A Study on the Generation of Field-Aligned Current in the Magnetosphere, Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and planetary sciences,31,1,2000,1-9,doi:10.5109/1546805
Uozumi, T., K. Yumoto, H. Kawano, A. Yoshikawa, J. V. Olson, S. I. Solovyev, E. F. Vershinin, Characteristics of energy transfer of Pi 2 magnetic pulsations: Latitudinal dependence, Geophysical Research Letters,27,11,2000,1619-1622,doi:10.1029/1999GL010767
Yoshikawa, A., M. Itonaga, The nature of reflection and mode conversion of MHD waves in the inductive ionosphere: Multistep mode conversion between divergent and rotational electric fields, Journal of Geophysical Research,105,A5,2000,10565-10584,doi:10.1029/1999JA000159
Itonaga, M., A. Yoshikawa, S. Fujita, A wave equation describing the generation of field-aligned current in the magnetosphere, Earth, Planets and Space,52,7,2000,503-507,doi:10.1186/BF03351654
Nakata H,, S Fujita, A. Yoshikawa, M. Itonaga, K. Yumoto, Ground magnetic perturbations associated with the standing toroidal mode oscillations in the magnetosphere-ionosphere system, Earth, Planets and Space,52,9,2000,601-613,doi:10.1186/BF03351669
Yoshikawa, A., M. Itonaga, S. Fujita, H. Nakata, K. Yumoto, Eigenmode analysis of field line oscillations interacting with the ionosphere‐atmosphere‐solid Earth electromagnetic coupled system, Journal of Geophysical Research,104,A12,1999,28437-28457,doi:10.1029/1999JA900287
Shinohara, M., K. Yumoto, N. Hosen, A. Yoshikawa, H. Tachihara, O. Saka, T.‐I. Kitamura, Nalin Babulal Trivedi, Jose Marques Da Costa, N. J. Schuch, Wave characteristics of geomagnetic pulsations across the dip equator, Journal of Geophysical Research,103,A6,1998,11745-11754,doi:10.1029/97JA03067
Itonaga, M., A. Yoshikawa, K. Yumoto, Transient response of the non-uniform equatorial ionosphere to compressional MHD waves, Journal of atmospheric and solar-terrestrial physics,60,2,1998,253-261,doi:10.1016/S1364-6826(97)00110-7
Shinohara, M., K. Yumoto, A. Yoshikawa, O. Saka, S. I. Solovyev, E. F. Vershinin, N. B. Trivedi, J. M. Da Costa, Wave characteristics of daytime and nighttime Pi 2 pulsations at the equatorial and low latitudes, Geophysical Research Letters,24,18,1997,2279-2282,doi:10.1029/97GL02146
Itonaga, M., A. Yoshikawa, K. Yumoto, One-dimensional transient response of the inner magnetosphere at the magnetic equator, 1. Transfer function and poles, Journal of geomagnetism and geoelectricity,49,1,1997,21-48,doi:10.5636/jgg.49.21
Itonaga, M., A. Yoshikawa, K. Yumoto, One-dimensional transient response of the inner magnetosphere at the magnetic equator, 2. Analysis of waveforms, Journal of geomagnetism and geoelectricity,49,1,1997,49-68,doi:10.5636/jgg.49.49
Itonaga, M., A. Yoshikawa, The excitation of shear Alfvén wave and the associated modulation of compressional wave in the inner magnetosphere, Journal of geomagnetism and geoelectricity,48,11,1996,1451-1459,doi:10.5636/jgg.48.1451
Yoshikawa, A., M. Itonaga, Reflection of shear Alfvén waves at the ionosphere and the divergent Hall current, Geophysical Research Letters,23,1,1996,101-104,doi:10.1029/95GL03580
Itonaga, M., A. Yoshikawa, T.-I. Kitamura, Interaction between hydromagnetic waves and the anisotropically conducting ionosphere, Journal of geomagnetism and geoelectricity,47,5,1995,459-474,doi:10.5636/jgg.47.459
Itonaga, M., T.-I. Kitamura, O. Saka, H. Tachihara, M. Shinohara, A. Yoshikawa, Discrete spectral structure of low-latitude and equatorial Pi2 pulsation, Journal of geomagnetism and geoelectricity,44,3,1992,253-259,doi:10.5636/jgg.44.253
