Characteristics of Storm-time Electric Fields in the Inner Magnetosphere Derived From Cluster Data

Details Characteristics of Storm-time Electric Fields in the Inner Magnetosphere Derived From Cluster Data Characteristics of Storm-time Electric Fields in the Inner Magnetosphere Derived From Cluster Data

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11a1593m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM11A-1593

Physics

2712 Electric Fields (2411), 2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions (2431), 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

We report storm-time electric fields in the inner magnetosphere at L=4-10 and full magnetic local time measured by Cluster. Here we use merged data from the Electron Drift Instrument (EDI) and the Electric Field and Wave (EFW) instrument. Data are analyzed statistically by picking storm periods during March 2001 and November 2007. Superposed epoch analysis with an epoch at Dst minimum is performed to reveal dependence of electric fields on epoch time and spacecraft locations. Strong electric fields are detected right around the Dst minimum for all magnetic local times, even though the data acquisition rate is not always large during these periods. The magnitude of electric fields often increases as L value decreases, although this is not always the case. The data are further examined in terms of the location of the inner edge of plasmasheet electrons and controlling parameters such as geomagnetic indices and interplanetary parameters.

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