Magnetospheric and Ionospheric Response to the Interplanetary Shocks

Details Magnetospheric and Ionospheric Response to the Interplanetary Shocks Magnetospheric and Ionospheric Response to the Interplanetary Shocks

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm44a..02z&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM44A-02

Physics

2451 Particle Acceleration, 2774 Radiation Belts, 2784 Solar Wind/Magnetosphere Interactions, 7900 Space Weather

Scientific paper

The Cluster spacecraft and ground-based Digisonde network observed on November 7, 2004 a strong interplanetary shock interaction with Earth's magnetosphere which initiated a strong magnetic storm with Dst = -373 nT. When this interplanetary shock encountered the Earth system, the Cluster fleet were traveling in the inner magnetosphere region (L shell = 4.2) at almost exactly the Cluster's perigee (around 0900 MLT). This event provides an excellent opportunity to study the geospace response to a powerful interplanetary shock. The angle between the sun-Earth line and the normal direction of the shock front is only 3.0 degree indicating that the shock hit the geospace at ~12LT (local time) initially. It is found that energetic particle fluxes are enhanced strongly and the shock related ionospheric phenomena have obvious longitudinal and latitudinal distribution. The interplanetary shock has a significant influence on the dayside mid-high latitude stations, e.g. Millstone Hill, Wallops Island, etc. whereas the stations at the night sector do not seem to respond to the interplanetary shock immediately.

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