Electromagnetic ion cyclotron waves observed by Polar satellite and their relationship to magnetic storms

Details Electromagnetic ion cyclotron waves observed by Polar satellite and their relationship to magnetic storms Electromagnetic ion cyclotron waves observed by Polar satellite and their relationship to magnetic storms

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm21a..05c&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SM21A-05

Other

2772 Plasma Waves And Instabilities, 2788 Storms And Substorms

Scientific paper

The Magnetic Field Experiment (MFE) on board the Polar satellite has been observing electromagnetic ion cyclotron (EMIC) waves in different regions of the magnetosphere. In addition to the EMIC waves at high latitudes associated with precipitating magnetosheath plasma, two types of EMIC waves likely generated near the equator are also found. The first type is the long series of Pc 1 wave bursts at low latitudes in the outer magnetosphere. These waves are left-handed polarized near the equator but more linearly polarized at higher latitudes. Their wave frequency is linearly proportional to the projected magnetic field at the equator rather than the ambient field. These observational results suggest that this type of EMIC wave is generated near the equator and propagating along field lines. Another type of EMIC wave occurs in the plasmasphere during the recovery phase of magnetic storms. These waves may appear as structured Pc 1 waves with a constant carrier frequency as the spacecraft traverses different altitudes along a field line. We examine the occurrence and propagation of these EMIC waves to investigate their relationship to magnetic storms.

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