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2021

The effect of non-storm time substorms on the ring current dynamics

Abstract During geomagnetically active times such as geomagnetic storms, large amounts of energy can be released into the Earth’s magnetosphere and change the ring current intensity. Previous studies showed that significant enhancement of the ring current was related to geomagnetic storms, while few studies have examined substorm effects on ring current dynamics. In this study, we examine the ring current variation during non-storm time (SYM-H > −50 nT) substorms, especially during super-substorms ( AE > 1000 nT). We per ...

Jang, Eunjin; Yue, Chao; Zong, Qiugang; Fu, Suiyan; Fu, HaoBo;

YEAR: 2021     DOI: https://doi.org/10.26464/epp2021032

super-substorms; ring current; ion fluxes; Van Allen Probes

2020

The Modulation of Plasma and Waves by Background Electron Density Irregularities in the Inner Magnetosphere

The background cold electron density plays an important role in plasma and wave dynamics. Here, we investigate an event with clear modulation of the particle fluxes and wave intensities by background electron density irregularities based on Van Allen Probes observations. The energies at the peak fluxes of protons and Helium ions of 100 eV to several keV are well correlated with the total electron density variation. Intense electromagnetic ion cyclotron (EMIC) and magnetosonic (MS) waves are simultaneously observed in the hi ...

Yue, Chao; Ma, Qianli; Jun, Chae-Woo; Bortnik, Jacob; Zong, Qiugang; Zhou, Xuzhi; Jang, Eunjin; Reeves, Geoffrey; Spence, Harlan; Wygant, John;

YEAR: 2020     DOI: https://doi.org/10.1029/2020GL088855

electron density irregularities; electromagnetic ion cyclotron; magnetosonic waves; suprathermal particles; Wave-particle interaction; wave growth rate; Van Allen Probes



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