Japan Geoscience Union Meeting 2023

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[E] Online Poster

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

[P-EM13] Dynamics of the Inner Magnetospheric System

Tue. May 23, 2023 9:00 AM - 10:30 AM Online Poster Zoom Room (1) (Online Poster)

convener:Kunihiro Keika(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo ), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Theodore E Sarris(Democritus University of Thrace), Evan G Thomas(Dartmouth College)

On-site poster schedule(2023/5/23 17:15-18:45)

9:00 AM - 10:30 AM

[PEM13-P09] Broadband and discrete ULF wave indices in the inner magnetosphere derived from magnetic field observation of Arase satellite

*Mariko Teramoto1, Ayako Matsuoka2, Yoshizumi Miyoshi3, Iku Shinohara4, Kentarou Kitamura1 (1.Kyushu Institute of Technology, 2.Kyoto University, 3.Nagoya University, 4.JAXA/ISAS)

The ultra low frequency (ULF) wave indices are derived from the amplitude of magnetic field distributions with the 2-8 min periods and determined by the ground measurements at high latitudes or satellites in geosynchronous orbit. This index characterizes the level of disturbance in the geomagnetic field. Evaluated ULF wave index is correlated with electron flux enhancements in the radiation belt [Kozyeva et al., 2007; Romanova et al., 2007; Romanova and Pilipenko, 2009].
In this study, we derived the broadband and discrete ULF wave indices at different L-shell in the inner magnetosphere (L < 8), using the magnetic field data from Arase satellite, considering both toroidal and poloidal ULF waves. We will compare them with solar wind parameters, and geomagnetic index and discuss possible applications of these indices.