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THEMIS observations of the spatial extent and pressure‐pulse excitation of field line resonances
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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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- Date created
- 2010
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- Subjects / Keywords
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- Type of Item
- Article (Published)
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- License
- © 2010 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.