Geomagnetic and Ionospheric Responses to the Interplanetary Shock Wave of March 17, 2015
Geomagnetic and Ionospheric Responses to the Interplanetary Shock Wave of March 17, 2015
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DOI：
10.1134/s1069351318050129
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
V. Pilipenko;M. Bravo;N. Romanova;O. Kozyreva;S. Samsonov;Ya. A. Sakharov
中科院分区：
文献类型：
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作者：
V. Pilipenko;M. Bravo;N. Romanova;O. Kozyreva;S. Samsonov;Ya. A. Sakharov
分析了2015年3月17日行星际激波从太阳风通过磁鞘、磁层和电离层向下传播到地球表面引起的扰动传播。机载卫星测量、全球磁力计网络数据和全球定位系统接收器的记录提供了电离层总电子含量的信息，用于分析。通过这一事件的例子，考虑了行星际激波对近地环境和地基工程系统影响的各个方面。它示出的影响，这种影响是很好地描述了现有的理论模型，哪些需要额外的研究。本文讨论了磁暴突然开始（SC）磁脉冲精细结构的形成--初始脉冲（PI）和主脉冲（MI）。GOES和RBSP卫星以及地磁共轭站观测到磁层磁场的MI和压缩;然而，PI仅在地球上被注意到。PI的下午部门几乎同时（1分钟内）与冲击波的影响磁层顶检测。波对SC的响应包括磁壳和磁声腔模的强衰减共振振荡。这项研究支持的可能性检测电离层响应的SC的GPS方法。TEC对MI的响应在极光纬度上被探测到，但并不是在每一条无线电路径上都被探测到，TEC的调制可能与超热电子向电离层低层的沉降有关，而这是riometers探测不到的。由行星际冲击波引起的地磁感应电流强度的爆发比风暴开始时的电流要高，尽管SC的振幅明显低于与亚暴相关的磁湾的振幅。
The propagation of perturbation caused by the interplanetary shock wave of March 17, 2015 from the solar wind through the magnetosheath, magnetosphere, and ionosphere down to the Earth’s surface is analyzed. The onboard satellite measurements, global magnetometer network data, and records by the receivers of the global positioning system (GPS) providing the information about the total electron content (TEC) of the ionosphere are used for the analysis. By the example of this event, various aspects of the influence of the interplanetary shock wave on the near-Earth environment and ground-based engineering systems are considered. It is shown which effects of this influence are well described by the existing theoretical models and which ones need additional research. The formation of the fine structure of the magnetic impulse of the storm sudden commencement (SC)—the preliminary impulse (PI) and main impulse (MI)—is considered. The MI and compression of the magnetospheric magnetic field is observed by the GOES and RBSP satellites and on the geomagnetically conjugate stations; however, the PI was only noted on the Earth. The PI was detected in the afternoon sector practically simultaneously (within 1 min) with the shock wave impact on the magnetopause. The wave’s response to the SC includes the strongly decaying resonant oscillations of the magnetic shells and the magnetoacoustic cavity mode. This study supports the possibility of detecting the ionospheric response to the SC by the GPS method. The TEC response to the MI was detected in the auroral latitudes although not on every radio path. The TEC modulation can be associated with the precipitation of superthermal electrons into the lower ionosphere which is undetectable by riometers. The burst in the intensity of the geomagnetically induced currents caused by an interplanetary shock wave turns out to be higher than the currents during the storm’s commencement, although the SC’s amplitude is noticeably lower than the amplitude of the magnetic bay related to the substorm.