Premium
Unusual auroral features observed on January 10‐11, 1983 and their possible relationships to the interplanetary magnetic field
Author(s) -
IAkasofu S.,
Tsurutani B.
Publication year - 1984
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/gl011i010p01086
Subject(s) - interplanetary magnetic field , polar , physics , satellite , geophysics , magnetic field , astrophysics , astronomy , geology , solar wind , quantum mechanics
We report unusual auroral features observed by the DMSP‐F6 satellite on January 10 and 11, 1983. These features include the shift of the most active region to the morning sector, the shift of the polar cap center toward the evening sector, a large number of sun‐earth aligned arcs and the oval‐shaped diffuse glow without bright oval arcs. The simultaneous magnetic field observations by the ISEE‐3 and IMP‐8 satellites, together with a simple magnetospheric modeling result, suggest that the unusual features result from both the unusually large B y and a large positive B z component of the IMF.