THE OCCURRENCE RATE OF MAGNETOSPHERIC-SUBSTORM ONSETS - RANDOM AND PERIODIC SUBSTORMS
THE OCCURRENCE RATE OF MAGNETOSPHERIC-SUBSTORM ONSETS - RANDOM AND PERIODIC SUBSTORMS
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DOI：
10.1029/92ja02556
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发表时间：
1993-03-01
影响因子：
2.8
通讯作者：
BELIAN, RD
中科院分区：
文献类型：
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作者：
BOROVSKY, JE;NEMZEK, RJ;BELIAN, RD
在三颗地球同步卫星上监测粒子注入事件，以确定磁层亚暴的发生：对于发现的每对连续的亚暴，确定亚暴爆发之间的时间间隔 DELTAt。以这种方式，获得1001个DELTAt值。对 DELTAt 值的统计分析发现，亚暴爆发之间最可能的时间是 DELTAt 几乎等于 2.75 小时：这被解释为亚暴周期性发生时的亚暴之间的时间段。对DELTAt值的统计分析还发现了亚暴发生的随机概率，随机亚暴之间的平均时间约为5小时：推测这种随机发生可能是由太阳风以大约5小时的时间尺度随机变化的特性引起的。每年大约发生 1500 次亚暴：大约一半是周期性的，大约一半是随机发生的。
Particle-injection events are monitored on three geosynchronous satellites to determine the occurrences of magnetospheric substorms: for every consecutive pair of substorms found, the time interval DELTAt between substorm onsets is determined. In this manner, 1001 values of DELTAt are obtained. A statistical analysis of the DELTAt values finds that the most-probable time between substorms onsets is DELTAt almost-equal-to 2.75 hours: this is interpreted to be the period between substorms when substorms occur cyclically. The statistical analysis of the DELTAt values also finds a random probability for the occurrence of substorms with a mean time between random substorms of about 5 hours: it is speculated that this random occurrence may be caused by a property of the solar wind that varies randomly with an approximately 5-hour time scale. About 1500 substorms occur per year: about half axe periodic and about half occur randomly.