中文核心期刊
CNKI期刊全文数据库
中国科学引文数据库(CSCD)源期刊
中国科技论文统计源期刊
万方数据知识服务平台
英国《科学文摘》(SA)
美国化学文摘(CA)
俄罗斯《文摘杂志》(AJ)
德国《天文学与天体物理学文摘》(AAA)
英国《中国天文学和天体物理学》(SCI收录)全文摘译期刊之一
《中国学术期刊文摘》
《中国物理文摘》
《中国天文学文摘》

• 论文 • Previous Articles     Next Articles

Statistical Analysis of Substorm Onsets Determined by Geomagnetic Indices

Ding Weizhen; Cao Jinbin; Du Aimin   

  • Received:1900-01-01 Revised:1900-01-01 Online:2010-01-15 Published:2010-01-15

Abstract: Using substorm AL index, substorm AE index and field-aligned current AF index in 2004, distribution of substorm AL, AE and AF onsets are studied with respect to substorm auroral onset. It is found that with auroral onsets being zero time, AL and AE onsets are mainly distributed between -5 and +6 minute, with only few exceptions between -9 and +9 minute. Field-aligned current AF onsets have a broader distribution from -8 to +7 minute. The average time differences of AL, AE, AF onsets are 0.5, 0.5, and -0.1 minute. The most probable AL onset is almost simultaneous with auroral onset, but the most probable onsets of AE and AF are about 1 min prior to auroral onsets. For those intense substorms, the onsets of AL, AE and AF approach to auroral onsets. For the five largest substorms, the onsets of AL and AE precede auroral onsets, suggesting during super substorms, substorm electric jet begin to increase before auroral breakup.