The role of Pc5 waves in relativistic electron losses through the magnetopause
Thursday, October 1, 2015
Christos Katsavrias1, Ioannis A. Daglis1, Drew L Turner2, Marina Georgiou1, Konstantinos Papadimitriou1, Ingmar Sandberg1 and Georgios Balasis3, (1)National and Kapodistrian University of Athens, Athens, Greece, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)National Observatory of Athens, Athens, Greece
Abstract:
We investigate the response of the outer Van Allen belt electrons to geospace magnetic storms and magnetospheric substorms, triggered by Interplanetary Coronal Mass Ejections. We examine the electron equatorial electron phase space density (PSD) by using differential flux data from the Magnetospheric Electron Ion Spectrometers (MagEIS) on-board the Van Allen Probes, the Solid State Telescope (SST) of THEMIS (A, D and E), the EPIC Radiation Monitor of ESA’s XMM spacecraft and the MAGnetospheric Electron Detector (MAGED) of GOES 13 and 15. Observations show that losses due to magnetopause shadowing are accompanied by outward diffusion driven by Pc5 ULF waves. In addition, there is a 300 MeV/G threshold in energy that separates the source of relativistic electrons inside the outer belt even after the arrival of a prominent pressure pulse. The study is complemented by in-situ and ground-based data of the solar wind parameters and the geomagnetic indices.
