Japan Geoscience Union Meeting 2015

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM07] Space Weather, Space Climate, and VarSITI

Tue. May 26, 2015 9:00 AM - 10:45 AM 302 (3F)

Convener:*Ryuho Kataoka(National Institute of Polar Research), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University), Toshifumi Shimizu(Institute of Space and Astronautical Science, JAXA), Ayumi Asai(Unit for Synergetic Studies of Space, Kyoto University), Hidekatsu Jin(National Institude of Information and Communications Technology), Tatsuhiko Sato(Japan Atomic Energy Agency), Kanya Kusano(Solar-Terrestrial Environment Laboratory, Nagoya University), Hiroko Miyahara(College of Art and Design, Musashino Art University), Takuji Nakamura(National Institute of Polar Research), Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University), Kiminori Itoh(Graduate School of Engineering, Yokohama National University), Chair:Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University)

9:30 AM - 9:45 AM

[PEM07-34] Solar cycle phase and occurrence of intense space weather events

*Shinichi WATARI1, Takashi WATANABE1 (1.National Institute of Information and Communications Technology)

Keywords:solar cycle, space weather, extreme event

Length and shape of solar cycle expressed by sunspot number change cycle to cycle. We need to normalize this to discuss on dependence of solar cycle phase of intense space weather events. For example, it is important to study whether intense space weather events occur uniformly in a solar cycle or not. We normalize shape of cycles using length, rise time, and fall time of cycles. In our presentation, we will report our result of analysis on large flares, intense geomagnetic storms, and so on.