A role of magnetopause shadowing on relativistic electron loss of the outer radiation belt

Details A role of magnetopause shadowing on relativistic electron loss of the outer radiation belt A role of magnetopause shadowing on relativistic electron loss of the outer radiation belt

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm33c1914m&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM33C-1914

Physics

[2720] Magnetospheric Physics / Energetic Particles: Trapped, [2730] Magnetospheric Physics / Magnetosphere: Inner, [7900] Space Weather

Scientific paper

It has been known that relativistic electron fluxes rapidly decrease associate with solar wind disturbances. If the magnetopause shadowing (MPS) is effective for decreases of the energetic electrons of the outer belt, close correlations are expected between the position of the outer edge of the outer belt and solar wind parameters such as the dynamic pressure and IMF Bz. In order to clarify a role of the MPS on electron losses of the outer belt, we statistically investigate the dependence of the outer edge position of the outer belt on the solar wind parameters and the magnetopause distance using the THEMIS/SST and GOES data. As a preliminary result, it is found that solar wind dynamic pressure and southward IMF Bz tend to have large value during the events. Moreover, we show that there is a correlation between the L-shell of the outer edge of the outer belt and the magnetopause location. These statistical results are mostly consistent with previous simulation and observational studies, which indicated that the MPS efficiently works for the loss of the energetic electrons of the outer part of the outer belt. Therefore, we suggest that the MPS is effective for losses of energetic electrons of the outer part of the outer belt.

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