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Session: Heliophysics and the Solar System

Name: Ms. Varvara Kotsiourou (National & Kapodistrian Univ. of Athens)
Coauthors: Daglis Ioannis A. (National & Kapodistrian Univ. of Athens)
Type: Oral
Title: Effect of magnetospheric substorms on the enhancement of the ring current according to observations from the Van Allen Probes mission.
Abstract:

The ring current is a dynamic current system whose structure and intensity can change dramatically on many time scales, depending on the level of disturbances induced by the solar wind. During intense geomagnetic activity, the composition of the ring current changes due to large amounts of energy released into the Earth's inner magnetosphere. There is a significant enhancement of the ring current related to geomagnetic storms, while there is poor knowledge of the contribution of non storm substorms on the ring current dynamics. In this study we have utilized data from the Radiation Belt Storm Probes Ion Composition Experiment (RBSPICE) and from Helium Oxygen Proton Electron (HOPE) instrument and we have examined the ring current variation during non-storm time (SYM-H > −50 nT), super-substorms (AL >-1000 nT) and non-storm time normal-substorms (-500nT