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Title of Journal: Astrophys Space Sci

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Abbravation: Astrophysics and Space Science

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Springer Netherlands

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DOI

10.1007/bf03185854

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1572-946X

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Correlated observations and simulations on the bui

Authors: Zhaoguo He Hui Zhu Siqing Liu Qiugang Zong Yongfu Wang Ruilin Lin Liqin Shi Jiancun Gong
Publish Date: 2014/12/05
Volume: 355, Issue: 2, Pages: 245-251
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Abstract

We report the multisatellite LANL GOES10 and Cluster observation data of electron flux evolutions and chorus wave excitation in the radiation belt during the geomagnetic storm and substorm from 10 to 14 January 2002 The seed 50–225 keV electron flux increased 50 times in five hours during the storm main phase and the relativistic 06 MeV electron flux increased about 60 times at night side during the recovery phase In the meanwhile the Cluster satellites detected intense chorus waves the wave power up to ∼10−3 nT2 Hz−1 at MLT≈3 when passing through the outer radiation belt Using a Gaussian fit to the observed chorus spectra we calculate the driftaveraged diffusion coefficients and then solve a 2D FokkerPlanck diffusion equation We simulate the energetic electron flux evolutions driven by chorus waves in two cases with and without seed electron injections We show that the energetic electron flux increases 79 times in three days with injection comparable to the observation However the flux increases only 3 times in three days without injection far below the observation The current results suggest that the injected seed electrons and chorus waves play important roles in the buildup of the radiation belt electrons

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