Characteristics of the association between an SC and a substorm onset
The time lag and other characteristics between an SC and an onset of a substorm were investigated. A substorm onset was defined by an onset of a Pi2 magnetic pulsation observed at three mid-latitude observatories. A clear occurrence peak of the substorm onsets appeared statistically around 10 min af...
| Main Authors: | , |
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| Format: | Report |
| Language: | English |
| Published: |
Data Analysis Center for Geomagnetism and Spacemagnetism, Faculty of Sciences, Kyoto University
1983
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1417 http://id.nii.ac.jp/1291/00001417/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1417&item_no=1&attribute_id=18&file_no=1 |
| Summary: | The time lag and other characteristics between an SC and an onset of a substorm were investigated. A substorm onset was defined by an onset of a Pi2 magnetic pulsation observed at three mid-latitude observatories. A clear occurrence peak of the substorm onsets appeared statistically around 10 min after the onset time of the SC's, but it did not appear for the negative SI (SI^-) events. A typical example showed that this time lag was consistent with the idea of the substorm triggering in the near earth magnetotail. The necessity of the preconditions for the SC-triggering was not so clear, but the SC-amplitude dependence of the triggering probability was clear. These results strongly suggest the reality of the triggering of a substorm by a sudden compression of the deep magnetosphere. |
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