書誌事項
- 公開日
- 1998-04
- 権利情報
-
- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
-
- 10.1029/97ja03337
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>Using the <jats:italic>Dst</jats:italic> index, more than 1200 geomagnetic storms, from weak to intense, spanning over three solar cycles have been examined statistically. Interplanetary magnetic field (IMF) and solar wind data have also been used in the study. It is found that for more than 50% of intense magnetic storms, the main phase undergoes a two‐step growth in the ring current. That is, before the ring current has decayed significantly to the prestorm level, anew major particle injection occurs, leading to a further development of the ring current, and making <jats:italic>Dst</jats:italic> decrease a second time. Thus intense magnetic storms may often be the result of two closely spaced moderate storms. The corresponding signature in the interplanetary medium is the arrival of double‐structured southward IMF at the magnetosphere.</jats:p>
収録刊行物
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- Journal of Geophysical Research: Space Physics
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Journal of Geophysical Research: Space Physics 103 (A4), 6917-6921, 1998-04
American Geophysical Union (AGU)
