Premium
The aurora during the passage of the May 27, 1996 magnetic cloud
Author(s) -
Frey H. U.,
Mende S. B.,
Vo H. B.,
Doolittle J. H.,
Weatherwax A. T.,
Rosenberg T. J.
Publication year - 1998
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 - 10.1029/98gl00409
Subject(s) - magnetopause , noon , solar wind , magnetosphere , magnetic cloud , dynamic pressure , electron precipitation , geophysics , atmospheric sciences , physics , sky , magnetic field , geology , astronomy , interplanetary magnetic field , mechanics , quantum mechanics
On May 27, 1996 two all‐sky cameras in Antarctica observed the aurora during the passage of a magnetic cloud. Compression of the magnetosphere by the solar wind dynamic pressure pulse in front of the magnetic cloud caused a short, strong, and localized blue auroral emission which moved towards noon in the late morning sector. The emission was caused by electrons of 8 keV energy. The high dynamic pressure caused a diffuse large‐scale (at least 3 h MLT and 5° latitude) blue emission on closed field lines. The high energy electron precipitation disappeared after the enhanced solar wind dynamic pressure region had passed the sub‐solar magnetopause.