首页> 外文期刊>Canadian Journal of Physics >Geomagnetic field H, Z, and electromagnetic induction features of coronal mass ejections in association with geomagnetic storm at African longitudes
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Geomagnetic field H, Z, and electromagnetic induction features of coronal mass ejections in association with geomagnetic storm at African longitudes

机译:冠状沟壑区H,Z和非洲磁性风暴结合的冠状大规模射精电磁诱导特征

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The largest geomagnetic disturbance caused by a coronal mass ejection (CME) of solar cycle 24 recorded on both 17 March and 22 June 2015 with minimum disturbance storm time values of -223 and -195 nT, respectively, was investigated. This study examines the effect of CME on Earth's geomagnetic field, which includes the time derivatives of horizontal (H) and vertical (Z) components of the geomagnetic field and the rate of induction Delta Z/Delta H at African longitudes (AAE, MBO, HBK, HER, and TAM). The results demonstrated enhancement of dH/dt and dZ/dt in the daytime over the equatorial zone (AAE and MBO) and mid-latitudes (TAM, HER, and HBK) on 17 March 2015. Nighttime enhancement was observed on 22 June 2015 over the equatorial zones and mid-latitudes. Wavelet spectrum approach is used to investigate Delta Z/Delta H variation observed at AAE, MBO, HBK, HER, and TAM. The CME may have influence on time derivatives of geomagnetic field H, Z, and electromagnetic induction at the African longitudes, which may be associated with perturbations in electric fields and currents in the equatorial and low-latitude magnetic field linked with the changes in magnetospheric convection.
机译:研究了在3月17日和2015年6月22日的太阳循环(CME)的最大地磁扰动,分别记录在2015年3月17日和2015年6月22日的最小扰动训练时间值-223和-195nt。本研究探讨了CME对地球磁场的影响,包括地磁场的水平(H)和垂直(Z)组分的时间衍生物和非洲长期(AAE,MBO, HBK,她和TAM)。结果表明,2015年3月17日在赤道区(AAE和MBO)和中纬度(TAM,她和HBK)中的DH / DT和DZ / DT的增强。2015年6月22日观察到夜间增强赤道区和中纬度。小波谱方法用于研究在AAE,MBO,HBK,她和TAM处观察到的Delta Z / Delta H变异。 CME可能对非洲长度的地磁场H,Z和电磁感应的时间衍生物的影响,这可能与赤纬磁场中的电场和电流相关联,与磁体对流的变化有关的赤道和低纬度磁场中的电流相关联。

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