[P-EM10] Dynamics of Magnetosphere and Ionosphere

[PEM10-22] Comparative study on chorus waves in March 2017 storm between the RAM-SCB/electron hybrid simulations, the Arase observations and the ground-based observations

*Yoshizumi Miyoshi¹, Vania Jordanova², Yuto Katoh³, Shinji Saito⁴, Satoshi Kurita⁵, Shoya Matsuda¹⁰, Yoshiya Kasahara¹⁰, Fuminori Tsuchiya³, Atsushi Kumamoto³, Satoko Nakamura¹, Satoshi Kasahara⁶, Shoichiro Yokota⁷, Tomoaki Hori¹, Kunihiro Keika⁶, Yoichi Kazama⁸, S-Y Wang⁸, Chae-Woo Jun¹, Takefumi Mitani⁹, Takeshi Takashima⁹, Nana Higashio⁹, Ayako Matsuoka⁵, Kazuo Shiokawa¹ (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.Los Alamos National Laboratory, 3.Tohoku University, 4.NICT, 5.Kyoto University, 6.University of Tokyo, 7.Osaka University, 8.ASIAA, 9.JAXA, 10.Kanazawa University)

Keywords:Arase, Computer simulation, Chorus waves

We simulate the time evolution of the distribution function of electrons and plasmasphere using the RAM-SCB for the March 2017 storm. During the storm, the Arase satellite observed continuous chorus wave activity in the morning sector of the inner magnetosphere, and also identified the growing peak in electron phase space density, which is evidence of the internal acceleration [Miyoshi et al., 2021]. Using the simulated distribution function data, we calculate several physical parameters related to the wave generation: linear growth rate, non-linear optimum amplitude and threshold, the temperature anisotropy and the relative composition of the hot electrons [Katoh et al., 2018]. We compare the chorus wave activities from Arase and the ground with the simulated parameters to discuss how these parameters are related to the actual chorus dynamics.