Magnetosphere inflation during the recovery phase of geomagnetic storms as an excellent magnetic confinement of killer electrons

Details Magnetosphere inflation during the recovery phase of geomagnetic storms as an excellent magnetic confinement of killer electrons Magnetosphere inflation during the recovery phase of geomagnetic storms as an excellent magnetic confinement of killer electrons

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3506s09k&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 6, CiteID L06S09

Physics

Plasma Physics

6

Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Interplanetary Physics: Coronal Mass Ejections (7513), Solar Physics, Astrophysics, And Astronomy: Coronal Holes, Space Plasma Physics: Particle Acceleration

Scientific paper

Extreme flux enhancement of outer radiation belt electrons was observed at geosynchronous orbit during the recovery phase of a large magnetic storm on 27-30 July 2004. The storm main phase is driven by a very fast magnetic cloud of ~1000 km/s associated with a coronal mass ejection (CME). The high-speed stream of ~600 km/s originated from a coronal hole follows the magnetic cloud and the coronal hole stream (CHS) is rarefied due to the speed difference between the CME and CHS. During the storm recovery phase, the magnetosphere is surrounded by the very low-density CHS, causing an inflation of the magnetosphere. It is found that such a combination of the CME and CHS can be one of the most dangerous solar wind structures for the outer radiation belt, and the associated very low dynamic pressure can cause the magnetosphere inflation during the storm recovery phase as an excellent magnetic confinement of killer electrons.

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