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Coronal hole‐active region‐Current sheet (CHARCS) Association with intense interplanetary and geomagnetic activity
Author(s) -
Gonzalez W. D.,
Tsurutani B. T.,
McIntosh P. S.,
Clúa de Gonzalez A. L.
Publication year - 1996
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 - 10.1029/96gl02393
Subject(s) - geomagnetic storm , coronal mass ejection , interplanetary spaceflight , solar cycle 22 , solar cycle 23 , earth's magnetic field , solar flare , coronal hole , physics , current sheet , corona (planetary geology) , latitude , solar cycle , solar wind , geophysics , astrophysics , astronomy , magnetohydrodynamics , plasma , astrobiology , magnetic field , quantum mechanics , venus
Intense geomagnetic storms ( Dst ≤ −100 nT) have been associated with interplanetary structures involving large‐intensity ( B s ≥ 10 nT) and long‐duration ( T ≥ 3 hours) values of the southward component of the IMF. We show that near solar maximum, the solar origin of such structures seems to be associated with active regions* (involving flares and/ or filament eruptions) occurring close to the streamer belt and to growing low‐latitude coronal holes. It is also shown that low‐latitude coronal holes had a dual‐peak solar cycle distribution during solar cycle 21, similar to that previously reported for the above mentioned interplanetary and geomagnetic phenomena.