THE GEOMAGNETIC RESPONSE OF JULY 2000 EVENT
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摘要: 2000年7月空间大事件对地磁场产生了巨大影响,7月15日至18日发生大磁暴（K=9）.磁暴为急始型,在我国地区初相期变幅有200-300 nT,主相最大幅度有500-600nT,为多年来所罕见.在行星际磁场Bz由北向转向南向时,磁暴主相开始;南向分量达到最大值后大约2 h,地磁H分量达到最小值,恢复相开始.并且,这次磁暴与太阳风也存在一定的对应关系.Abstract: The geomagnetic field responds to the July 2000 space event much. A great storm （magnetic index K = 9） occurred from July 15 to July 18. There is a sudden commencement with amplitudes about 200-300 nT in China region. The maximum amplitudes during the main phase in China region are about 500-600 nT. That is infrequent for a few years. The Bz component of IMF is turning to southward when the main phase of the storm begins, and after the southward component （Bz＜ 0) decrease to the minimum, two hours later the storm recovery phase begins. The paper shows that there are some relationship between the solar wind and the storm.
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