Fourth annual CHARM meeting

EPT observations of flux enhancements and depletion of particle in the Radiation Belts after the March 17 event.

4 Jun 2015, 14:50

25m

RMI meeting room (IASB-BIRA (RMI Royal Meteorologic Institute meeting room))

Session 2

Speaker

Graciela López Rosson (BISA)

Description

Geomagnetic storms can be unpredictable, as long as the response of the radiation belts. Sometimes we observe flux enhancements mainly after Dst events (electrons), or SEP (protons and alpha particles), but there are also another times, which are less commons, when particles almost disappear from certain regions. These flux variations affect and change the configuration of the Van Allen Belts. We present as an example of this situation the event occurred on March 17, 2015. The new instrument EPT (Energetic Particle Telescope), onboard ESA satellite PROBA-V, launched May 7, 2013, has observed this behavior: the particles flux enhancement, a depletion of particles after the increment, and finally a restructuration of the radiation belts. We are trying to understand which mechanism are behind those variation, and why can be so different from an event to another one.