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THEMIS observations of the spatial extent and pressure‐pulse excitation of field line resonances
Author(s) -
Sarris T. E.,
Liu W.,
Li X.,
Kabin K.,
Talaat E. R.,
Rankin R.,
Angelopoulos V.,
Bonnell J.,
Glassmeier K.H.
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2010gl044125
Subject(s) - magnetosphere , physics , amplitude , field line , electric field , magnetic field , excitation , field (mathematics) , line (geometry) , equator , computational physics , excited state , geophysics , optics , atomic physics , astronomy , mathematics , geometry , quantum mechanics , pure mathematics , latitude
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.