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Solar wind control of polar chorus
Author(s) -
Salvati M. A.,
Inan U. S.,
Rosenberg T. J.,
Weatherwax A. T.
Publication year - 2000
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 - 10.1029/1999gl010702
Subject(s) - chorus , magnetopause , riometer , solar wind , atmospheric sciences , magnetosphere , dynamic pressure , intensity (physics) , environmental science , polar , magnetosheath , geophysics , ionosphere , geology , physics , astronomy , plasma , art , literature , quantum mechanics , mechanics
The intensity of chorus as observed at several high latitude ground stations in the Antarctic is highly correlated with the solar wind dynamic pressure exerted on the magnetopause boundary. In two different cases, intense chorus and associated precipitation measured as riometer absorption were abruptly interrupted by several minutes of deep quieting. Satellite measurements of solar wind dynamic pressure showed the intensity of chorus to rapidly respond to magnetospheric compression and relaxation over an extended region as evidenced by the fact the effect was observed at multiple sites.