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dc.contributor.authorKataoka, Ryuho
dc.contributor.authorNishiyama, Takanori
dc.contributor.authorTanaka, Yoshimasa
dc.contributor.authorKadokura, Akira
dc.contributor.authorUchida, Herbert Akihito
dc.contributor.authorEbihara, Yusuke
dc.contributor.authorEjiri, Mitsumu K.
dc.contributor.authorTomikawa, Yoshihiro
dc.contributor.authorTsutsumi, Masaki
dc.contributor.authorSato, Kaoru
dc.contributor.authorMiyoshi, Yoshizumi
dc.contributor.authorShiokawa, Kazuo
dc.contributor.authorKurita, Satoshi
dc.contributor.authorKasahara, Yoshiya
dc.contributor.authorOzaki, Mitsunori
dc.contributor.authorHosokawa, Keisuke
dc.contributor.authorMatsuda, Shoya
dc.contributor.authorShinohara, Iku
dc.contributor.authorTakashima, Takeshi
dc.contributor.authorSato, Tatsuhiko
dc.contributor.authorMitani, Takefumi
dc.contributor.authorHori, Tomoaki
dc.contributor.authorHigashio, Nana
dc.contributor.alternative片岡, 龍峰
dc.contributor.alternative西山, 尚典
dc.contributor.alternative田中, 良昌
dc.contributor.alternative門倉, 昭
dc.contributor.alternative内田, ヘルベルト 陽仁
dc.contributor.alternative海老原, 祐輔
dc.contributor.alternative江尻, 省
dc.contributor.alternative冨川, 喜弘
dc.contributor.alternative堤, 雅基
dc.contributor.alternative佐藤, 薫
dc.contributor.alternative三好, 由好
dc.contributor.alternative塩川, 和夫
dc.contributor.alternative栗田, 怜
dc.contributor.alternative笠原, 禎也
dc.contributor.alternative尾崎, 光紀
dc.contributor.alternative細川, 敬祐
dc.contributor.alternative松田, 昇也
dc.contributor.alternative篠原, 育
dc.contributor.alternative高島, 健
dc.contributor.alternative佐藤, 達彦
dc.contributor.alternative三谷, 烈史
dc.contributor.alternative堀, 智昭
dc.contributor.alternative東尾, 奈々
dc.descriptionオーロラが爆発するとヴァン・アレン帯の電子が上空65 kmにまで侵入することを解明. 京都大学プレスリリース. 2019-02-12.
dc.description.abstractTransient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during the auroral breakup that occurred from 2220 to 2226 UT on June 30, 2017. During this event, the footprint of the Arase satellite was located within the field of view of the all-sky imagers at Syowa Station in the Antarctic. Auroral observations at Syowa Station revealed the dominant precipitation of relatively soft electrons during the auroral breakup. A corresponding spike in cosmic noise absorption was also observed at Syowa Station, while the Arase satellite observed a flux enhancement of > 100 keV electrons and a broadband noise without detecting chorus waves or electromagnetic ion cyclotron waves. A general-purpose Monte Carlo particle transport simulation code was used to quantitatively evaluate the ionization in the middle atmosphere. Results of this study indicate that the precipitation of energetic electrons of > 100 keV, rather than X-rays from the auroral electrons, played a dominant role in the transient and deep (65–70 km) mesospheric ionization during the observed auroral breakup.
dc.publisherSpringer Nature
dc.rights© The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
dc.subjectEnergetic electrons
dc.titleTransient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station
dc.type.niitypeJournal Article
dc.identifier.jtitleEarth, Planets and Space
dc.identifier.kaken15H05815 / 16H06286 / 15H02628 / 16H04056 / 14J02108 / 17H06140 / 15H05747
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