Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm13e..07f&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM13E-07
Other
2731 Magnetosphere: Outer, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts, 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954)
Scientific paper
Electromagnetic ion cyclotron (EMIC) waves are considered to play an important role in magnetosphere dynamics, including contributions to ring current ion losses and radiation belt electron losses. Theoretical studies suggest that some of these processes may be most effective during the main phase of geomagnetic storms. However, ground-based signatures of EMIC waves, Pc1-2 geomagnetic pulsations, are only occasionally observed during the main phase, and more frequently occur during the recovery phase. In this study using space-based data, we will investigate the association of EMIC waves with the various storm phases in case studies of up to 10 geomagnetic storms over 1996 - 2002. High resolution data from the GOES 8-12 geostationary satellite magnetometers provide information on EMIC wave activity in the 0 - 1 Hz band. Storm data includes Dst, Kp and upstream solar wind and IMF parameters. Other properties of the EMIC waves of interest to modellers including wave frequency, wave power and spectral energy density will be investigated with respect to the storm phase.
Fraser Brian J.
Green James C.
Singer Howard J.
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