Relativistic electrons and magnetic storms: 1992–1995
Relativistic electrons and magnetic storms: 1992–1995
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DOI：
10.1029/98gl01398
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发表时间：
1998-06
影响因子：
5.2
通讯作者：
G. Reeves
中科院分区：
文献类型：
--
作者：
G. Reeves
本文研究了地球同步轨道上的相对论电子增强与 Dst 指数测量的磁暴之间的关系。我们分析了 1992 年至 1995 年期间发生的 30 个最强烈的相对论电子事件以及 1993 年发生的所有事件。每个相对论电子事件都与 Dst 指数中的磁暴相关，但是，磁暴发生时相对论电子通量不会明显增强。通过将每个事件中的最大电子通量与最小 Dst 值相关联，我们发现最大相对论电子通量和最大环电流强度大致相关，但存在相当大的变化。这些结果表明，产生环形电流响应所必需的太阳风条件对于产生强相对论性电子响应也是必要的，但在太阳风或磁层中还有一些额外的因素，决定了给定的风暴是否会产生相对论性电子以及该响应的强度。
This paper examines the relationship between relativistic electron enhancements at geosynchronous orbit and magnetic storms measured by the Dst index. We analyzed the 30 most intense relativistic electron events from 1992 to 1995 and all events that occurred in 1993. Every relativistic electron event was associated with a magnetic storm in the Dst index, but, magnetic storms could occur with no appreciable enhancement of the relativistic electron fluxes. By correlating the maximum electron flux in each event with the minimum Dst value we found that the maximum relativistic electron fluxes and maximum ring current intensity are roughly correlated but that there is considerable variation. These results suggest that the solar wind conditions that are necessary to generate a ring current response are also necessary to generate a strong relativistic electron response but that there is some additional factor, either in the solar wind or in the magnetosphere, that determines whether a given storm will produce relativistic electrons or not and how strong that response will be.