Coronal hole‐active region‐Current sheet (CHARCS) Association with intense interplanetary and geomagnetic activity

作者：W. D. González, Bruce Tsatnam Tsurutani, P. S. McIntosh, Alicia González · 发表于：Geophysical Research Letters · 年份：1996 · DOI：10.1029/96gl02393 · 被引用次数：51 · 研究领域：Solar and Space Plasma Dynamics、Ionosphere and magnetosphere dynamics、Astro and Planetary Science

Intense geomagnetic storms (Dst ≤ −100 nT) have been associated with interplanetary structures involving large‐intensity (Bs ≥ 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.