The Effect of the January 10, 1997, Pressure Pulse on the Magnetosphere‐Ionosphere Current System
The Effect of the January 10, 1997, Pressure Pulse on the Magnetosphere‐Ionosphere Current System
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DOI：
10.1029/gm118p0217
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
E. Zesta;H. Singer;D. Lummerzheim;C. Russell;L. Lyons;M. Brittnacher
中科院分区：
文献类型：
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作者：
E. Zesta;H. Singer;D. Lummerzheim;C. Russell;L. Lyons;M. Brittnacher
1997年1月10日，WIND航天器在世界时10时30分至10时55分之间观测到一个强压力脉冲，该脉冲在延迟约半小时后撞击磁层，导致极光电喷流在所有当地时间都得到加强和扩大。电射流扰动的持续时间与太阳风压力脉冲的持续时间相同。该脉冲发生在1997年1月10日至11日的磁暴期间和强烈的地磁活动期间。我们研究的电离层电流的压力脉冲的影响，使用全球网络的100多个地面磁力计，从极地航天器的图像，从风和Geotail航天器的太阳风测量。我们发现，磁层和电离层的响应是直接驱动的太阳风条件，并明确相关的压力脉冲的开始，持续时间和结束。此外，看来，区域1电流的增强反对的磁层顶电流的增强中午附近的位置的效果。这些反应不是典型亚暴的特征。
On January 10, 1997, a strong pressure pulse, observed by the WIND spacecraft between 1030 and 1055 UT, hit the magnetosphere after about a one-half hour delay, causing the strengthening and widening of the auroral electrojet at all local times. The duration of the electrojet perturbation was the same as the duration of the solar wind pressure pulse. The pulse occurred during the well-studied January 10-11, 1997, magnetic storm and during strong geomagnetic activity. We study the effect of the pressure pulse on the ionospheric current using a global network of more than 100 ground magnetometers, images from the POLAR spacecraft, and solar wind measurements from the WIND and Geotail spacecraft. We find that the magnetospheric and ionospheric response is directly driven by the solar wind conditions and clearly related to the onset, duration and end of the pressure pulse. In addition, it appears that the enhancement of the Region 1 currents opposed the effect of the enhancement of the magnetopause current for locations near noon. These responses are not characteristics of a typical substorm.