Magnetospheric field reduction in response to enhanced solar wind dynamic pressure

Details Magnetospheric field reduction in response to enhanced solar wind dynamic pressure Magnetospheric field reduction in response to enhanced solar wind dynamic pressure

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm33b1342m&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM33B-1342

Physics

2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

High-time resolution magnetic field observations at GOES and Polar satellites have been used to investigate the magnetospheric response to sudden enhancements in the solar wind dynamic pressure (Psw). Over much of the magnetosphere, the magnetic field strength is enhanced when the Psw increases, as seen in ground-based magnetometer data at low latitudes. In some cases, however, the Psw increases can lead to sudden reductions in the magnetic field strength. The decrease in the magnetic field strength starts almost at the same time as a passage of the fast mode wave in the magnetosphere. In this study, we present preliminary results of some Psw-induced magnetic field reduction events and discuss the generation mechanism.

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