THEMIS observations of the spatial extent and pressure-pulse excitation of field line resonances

Details THEMIS observations of the spatial extent and pressure-pulse excitation of field line resonances THEMIS observations of the spatial extent and pressure-pulse excitation of field line resonances

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3715104s&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 15, CiteID L15104

Physics

3

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

We present a case study of Field Line Resonances (FLRs) in the dayside magnetosphere, observed in both electric and magnetic field components at multiple L-shells near the equator. The event measured by the five THEMIS probes and the nearby GOES and Geotail satellites provides a unique opportunity to differentiate between temporal and spatial characteristics of FLRs. Narrow-band FLRs were excited globally at different frequencies matching the local field line resonant frequency. In conjunction with a sharp increase in the upstream solar wind density, prompt intensification of the FLR power was observed at different L-shells, simultaneously at different frequencies and amplitudes.

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