| 行星际南向磁场事件与强磁暴 |
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| 引用本文： | 高玉芬,张秀玲. 行星际南向磁场事件与强磁暴[J]. 空间科学学报, 2000, 20(2): 136-143 |
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| 作者姓名： | 高玉芬 张秀玲 |
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| 作者单位： | 中国地震局地球物理研究所北京 100081 |
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| 基金项目： | 国家自然科学基金资助项目(49834040)和中国科学院日球模拟开放研究实验室联合支持,中国地震局地球物理研究所论文标注号00AC1007 |
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| 摘 要： | 利用１９７８－１９８８年期间的太阳风和地磁资料对行星际磁场（ＩＭＦ）南向分量Ｂｓ事件（即Ｂｓ〉１０ｎＴ及其所驱动的错向电场ＶＢｓ〉５ｍＶ／ｍ、持续时间△Ｔ〉３ｈ的事件）与弱磁暴（Ｄｓｔ≤－１００ｎＴ）关系进行了分析。结果表明，１００％的Ｂｓ事件能能引起磁暴的发生，但其中只有８４％为强磁暴；强磁暴的发生都与较强的ＩＭＦ Ｂｓ活动密切相关，但只有６８％的强磁共伴随Ｂｓ事件而发生；Ｂｓ事件与强磁暴并不是
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| 关 键 词： | 太阳风 行星际磁场 Bs事件 强磁暴 |
| 修稿时间： | 1999-09-07 |
RELATIONS BETWEEN IMF Bs EVENTS AND INTENSE MAGNETIC STORMS |
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| Gao Yufen,Zhang Xiuling. RELATIONS BETWEEN IMF Bs EVENTS AND INTENSE MAGNETIC STORMS[J]. Chinese Journal of Space Science, 2000, 20(2): 136-143 |
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| Authors: | Gao Yufen Zhang Xiuling |
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| Abstract: | The relationship between IMF Bs. events (Bs > 10nT, VBs > 5mV/m andboth last more than 3h) and intense magnetic storms (Dst < -100 nT) is analyzedusing the solar wind and geomagnetic data from 1978-1988. The results showthat one hundred percent of B. events can cause magnetic storms, but only 84% areintense storms. Although all the intense magnetic storms correlate to larger IMF Bsclosely only 68% of intense magnetic storms are actually caused by B. events. Therelationship between B. events and intense magnetic storms is not in correspondenceof one to one. The effects of magnetospheric background and fluctuations of B. onthe cause of magnetic storms must be taken into account. Also the attention shouldbe paid to the fact that Dst indices are affected by many electric current systemsafter than ring current. |
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| Keywords: | Solar wind Interplanetary magnetic field Bs event-magnetic storm |
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