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Interplanetary origin of intense geomagnetic storms (Dst <-100 nT) during solar cycle 23
被引:92
|作者:
Gonzalez, W. D.
Echer, E.
Clua-Gonzalez, A. L.
Tsurutani, B. T.
机构:
[1] INPE, BR-12245970 Sao Jose Dos Campos, Brazil
[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
关键词:
D O I:
10.1029/2006GL028879
中图分类号:
P [天文学、地球科学];
学科分类号:
07 ;
摘要:
We study the interplanetary causes of intense geomagnetic storms (Dst < -100 nT) that occurred during solar cycle 23 (1997-2005). It was found that the most common interplanetary structures leading to the development of an intense storm were: magnetic clouds, sheath fields, sheath fields followed by a magnetic cloud and corotating interaction regions leading high speed streams. However, the relative importance of each of those driving structures was found to vary with the solar cycle phase. We divide the cycle in three phases (rising, maximum and declining) and explain the differences. We also discuss about the geoeffectiveness of each of the four main interplanetary driving structures.
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