Faculty Profiles - SHIOKAWA, Kazuo

Papers - SHIOKAWA, Kazuo

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Investigation of Nighttime MSTIDS Observed by Optical Thermosphere Imagers at Low Latitudes: Morphology, Propagation Direction, and Wind Filtering Reviewed Open Access

Figueiredo C, A. O. B, Takahashi H, Wrasse C. M, Otsuka Y, Shiokawa K, Barros D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 9 ) page： 7843 - 7857 2018.9

Comparison of gravity wave propagation direction observed by mesospheric airglow imaging at three different latitudes by using M-transform Reviewed

Septi Perwitasari, Takuji Nakamura, Masaru Kogure, Yoshihiro Tomikawa, Mitsumu K. Ejiri, Kazuo Shiokawa

Annales Geophysicae Discussions page： 1 - 15 2018.9

Statistical Analysis of the Phase Velocity Distribution of Mesospheric and Ionospheric Waves Observed in Airglow Images Over a 16-Year Period: Comparison Between Rikubetsu and Shigaraki, Japan Reviewed Open Access

Tsuchiya Satoshi, Shiokawa Kazuo, Fujinami Hatsuki, Otsuka Yuichi, Nakamura Takuji, Yamamoto Mamoru

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 8 ) page： 6930-6947 2018.8

EMIC Wave Events During the Four GEM QARBM Challenge Intervals Reviewed Open Access

Engebretson M. J, Posch J. L, Braun D. J, Li W, Ma Q, Kellerman A. C, Huang C. -L, Kanekal S. G, Kletzing C. A, Wygant J. R, Spence H. E, Baker D. N, Fennell J. F, Angelopoulos V, Singer H. J, Lessard M. R, Horne R. B, Raita T, Shiokawa K, Rakhmatulin R, Dmitriev E, Ermakova E

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 8 ) page： 6394 - 6423 2018.8

On the Role of Thermospheric Winds and Sporadic E Layers in the Formation and Evolution of Electrified MSTIDs in Geomagnetic Conjugate Regions Reviewed Open Access

Narayanan V. L, Shiokawa K, Otsuka Y, Neudegg D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 8 ) page： 6957 - 6980 2018.8

Geospace exploration project ERG Reviewed Open Access

Yoshizumi Miyoshi, Iku Shinohara, Takeshi Takashima, Kazushi Asamura, Nana Higashio, Takefumi Mitani, Satoshi Kasahara, Shoichiro Yokota, Yoichi Kazama, Shiang-Yu Wang, Sunny W. Y. Tam, Paul T. P. Ho, Yoshiya Kasahara, Yasumasa Kasaba, Satoshi Yagitani, Ayako Matsuoka, Hirotsugu Kojima, Yuto Katoh, Kazuo Shiokawa, Kanako Seki

EARTH PLANETS AND SPACE Vol. 70 ( 1 ) 2018.6

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

The Exploration of energization and Radiation in Geospace (ERG) project explores the acceleration, transport, and loss of relativistic electrons in the radiation belts and the dynamics for geospace storms. This project consists of three research teams for satellite observation, ground-based network observation, and integrated data analysis/simulation. This synergetic approach is essential for obtaining a comprehensive understanding of the relativistic electron generation/loss processes of the radiation belts as well as geospace storms through cross-energy/cross-regional couplings, in which different plasma/particle populations and regions are strongly coupled with each other. This paper gives an overview of the ERG project and presents the initial results from the ERG (Arase) satellite.

DOI： 10.1186/s40623-018-0862-0

Open Access

Web of Science

Scopus

Equatorial plasma bubble seeding by MSTIDs in the ionosphere Reviewed Open Access

Takahashi Hisao, Wrasse Cristiano Max, Oliveira Barros Figueiredo Cosme Alexandre, Barros Diego, Abdu Mangalathayil Ali, Otsuka Yuichi, Shiokawa Kazuo

PROGRESS IN EARTH AND PLANETARY SCIENCE Vol. 5 2018.6

Periodic Oscillations in the D Region Ionosphere After the 2011 Tohoku Earthquake Using LF Standard Radio Waves Reviewed Open Access

Hiroyo Ohya, Fuminori Tsuchiya, Yuta Takishita, Hiroyuki Shinagawa, Kenro Nozaki, Kazuo Shiokawa

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 6 ) page： 5261 - 5270 2018.6

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER GEOPHYSICAL UNION

We report the first observations of similar to 100-s periodic oscillations of intensity in low-frequency (LF) standard radio waves over Japan at 05:51-05:56 UT, which was about 4min and 42s after mainshock onset of the 2011 off the Pacific coast of Tohoku earthquake on 11 March 2011 (Mw 9.0). The LF radio wave propagation paths used in this study were JJY (Japan, 60kHz)-Rikubetsu (RKB, Japan), and BPC (China, 68.5 kHz)-RKB, where the minimum distances between the epicenter and the LF propagation paths were 413.6 and 561.5 km, respectively. The observed modulations in intensity and phase were about 0.1 dB and 0.5 degrees, respectively. Based on a numerical simulation of the neutral atmosphere and the wave-hop method, the occurrence time of the similar to 100-s periodic oscillations was in good agreement with the total propagation time of the Rayleigh wave that spread concentrically from the epicenter to the LF propagation paths and acoustic waves propagating vertically from the Earth's surface to the bottom of the ionosphere. Variations in synthesized electric field intensity of ground waves and sky waves, calculated by the wave hop method up to 10 hops, reproduced similar similar to 100-s periodic oscillations that were caused by the difference in arrival time of the acoustic waves excited by the Rayleigh waves at each hop point. The amplitude of the D region electron density variations at 70km altitude during the similar to 100-s periodic oscillation was estimated to be about 1% compared to the background electron density, based on the numerical simulation.

DOI： 10.1029/2018JA025289

Web of Science

Scopus

Medium-Scale Traveling Ionospheric Disturbances Observed by Detrended Total Electron Content Maps Over Brazil Reviewed Open Access

Figueiredo C. A. O. B., Takahashi H., Wrasse C. M., Otsuka Y., Shiokawa K., Barros D.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 123 ( 3 ) page： 2215-2227 2018.3

Discovery of 1Hz Range Modulation of Isolated Proton Aurora at Subauroral Latitudes Open Access

Ozaki M., Shiokawa K., Miyoshi Y., Kataoka R., Connors M., Inoue T., Yagitani S., Ebihara Y., Jun C. -W., Nomura R., Sakaguchi K., Otsuka Y., Uchida H. A., Schofield I., Danskin D. W.

GEOPHYSICAL RESEARCH LETTERS Vol. 45 ( 3 ) page： 1209-1217 2018.2

Observations of aurora and electromagnetic disturbances originated from dynamic plasma variations in the Earth's inner magnetosphere Reviewed Open Access

Shiokawa Kazuo

Meeting Abstracts of the Physical Society of Japan Vol. 73.1 ( 0 ) page： 766 - 766 2018

First Study on the Occurrence Frequency of Equatorial Plasma Bubbles over West Africa Using an All-Sky Airglow Imager and GNSS Receivers Open Access

Okoh Daniel, Rabiu Babatunde, Shiokawa Kazuo, Otsuka Yuichi, Segun Bolaji, Falayi Elijah, Onwuneme Sylvester, Kaka Rafiat

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 122 ( 12 ) page： 12430-12444 2017.12

Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network Open Access

Shiokawa Kazuo, Katoh Yasuo, Hamaguchi Yoshiyuki, Yamamoto Yuka, Adachi Takumi, Ozaki Mitsunori, Oyama Shin-Ichiro, Nose Masahito, Nagatsuma Tsutomu, Tanaka Yoshimasa, Otsuka Yuichi, Miyoshi Yoshizumi, Kataoka Ryuho, Takagi Yuki, Takeshita Yuhei, Shinbori Atsuki, Kurita Satoshi, Hori Tomoaki, Nishitani Nozomu, Shinohara Iku, Tsuchiya Fuminori, Obana Yuki, Suzuki Shin, Takahashi Naoko, Seki Kanako, Kadokura Akira, Hosokawa Keisuke, Ogawa Yasunobu, Connors Martin, Ruohoniemi J. Michael, Engebretson Mark, Turunen Esa, Ulich Thomas, Manninen Jyrki, Raita Tero, Kero Antti, Oksanen Arto, Back Marko, Kauristie Kirsti, Mattanen Jyrki, Baishev Dmitry, Kurkin Vladimir, Oinats Alexey, Pashinin Alexander, Vasilyev Roman, Rakhmatulin Ravil, Bristow William, Karjala Marty

EARTH PLANETS AND SPACE Vol. 69 2017.11

Special Issue "Global data systems for the study of solar-terrestrial variability"

Watanabe Takashi, Iyemori Toshihiko, Shiokawa Kazuo, Zhang Jie, Kanekal Shrikanth G., Nishitani Nozomu

EARTH PLANETS AND SPACE Vol. 69 2017.11

Geomagnetically conjugate observations of ionospheric and thermospheric variations accompanied by a midnight brightness wave at low latitudes (vol 69, 112, 2017) Reviewed Open Access

D. Fukushima, K. Shiokawa, Y. Otsuka, M. Kubota, T. Yokoyama, M. Nishioka, S. Komonjinda, C. Y. Yatini

EARTH PLANETS AND SPACE Vol. 69 2017.11

GPS amplitude and phase scintillation associated with polar cap auroral forms

Jayachandran P. T., Hamza A. M., Hosokawa K., Mezaoui H., Shiokawa K.

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS Vol. 164 page： 185-191 2017.11

Statistical analysis of severe magnetic fluctuations in the near-Earth plasma sheet observed by THEMIS-E Open Access

Xu Heqiucen, Shiokawa Kazuo, Fruehauff Dennis

ANNALES GEOPHYSICAE Vol. 35 ( 5 ) page： 1131-1142 2017.10

Geomagnetically conjugate observations of ionospheric and thermospheric variations accompanied by a midnight brightness wave at low latitudes Open Access

Fukushima D., Shiokawa K., Otsuka Y., Kubota M., Yokoyama T., Nishioka M., Komonjinda S., Yatini C. Y.

EARTH PLANETS AND SPACE Vol. 69 2017.8

Sixteen year variation of horizontal phase velocity and propagation direction of mesospheric and thermospheric waves in airglow images at Shigaraki, Japan Open Access

Takeo D., Shiokawa K., Fujinami H., Otsuka Y., Matsuda T. S., Ejiri M. K., Nakamura T., Yamamoto M.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 122 ( 8 ) page： 8770-8780 2017.8

Equinoctial asymmetry in the zonal distribution of scintillation as observed by GPS receivers in Indonesia Open Access

Abadi P., Otsuka Y., Shiokawa K., Husin A., Liu Huixin, Saito S.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 122 ( 8 ) page： 8947-8958 2017.8

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Papers - SHIOKAWA, Kazuo