极地研究

极地研究 ›› 1996, Vol. 8 ›› Issue (1): 56-61.

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南极中山站与北京地磁中心台1991年3月24日磁暴的变化特征

刘长发;刘春节;杨友华;汪阳   

  • 出版日期:1996-03-30 发布日期:1996-03-30

CHANGE CHARACTERISTICS OF MAGNETIC STORM IN ANTARCTIC ZHONGSHAN STATION AND BEIJING MING TOMBS MAGNETIC OBSERVATORY CENTER OF CHINA ON MARCH 24,1991

  • Online:1996-03-30 Published:1996-03-30

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摘要：

本文分析了１９９１年３月２４日急始型磁暴的变化特征。分析表明，南极极隙区与中低纬区磁暴形态差异很大。中山站地磁台的磁暴急始为ＳＣ＊型，无明显磁暴主相，它是由一组强烈的磁亚暴所组成。北京地磁中心台的磁暴急始为ＳＣ型，磁暴主相持续时间较短，变化较大。这次磁暴是由磁暴前太阳黑子相对数增多、３月２２日２２ｈ４６ｍＵＴ有３ｂ级耀斑爆发等一系列太阳活动所引起的

关键词: 磁暴,亚暴,极隙区,南极

Abstract:

The change characteristics of magnetic storm of March 24,1991 are analyzed.This magnetic storm has different physical processes at the middle low latitudes and the southern polar cusp region.The magnetic sudden commencement is SC * and the magnetic main phase is composed of a series of the intense substorms at Zhongshan Station,Antarctica. At Beijing Ming Tombs Magnetic Observatory Center,the magnetic sudden commencement is SC ,the magnetic main phase duration is shorter and the change is bigger. This event was caused by the solar activities such as increases of the sunspot numbers, occurrence of a 3b optical flare at 22 h46 mUT on March 22,1991 and so on.