Abstract—

The paper presents the results of a comparative analysis of the dynamics of relativistic electron fluxes of the Earth’s outer radiation belt and correspondent ring current and magnetospheric magnetic field variations for February 15–22, 2014, based on experimental data obtained in the radiation belt core aboard Van Allen Probes satellites and in geostationary orbit aboard the GOES-15 satellite. The A2000 paraboloid model of the magnetosphere is used to calculate the contributions of main magnetospheric current systems to the Dst variation. The influence of external factors—solar wind and interplanetary magnetic field—is considered. Comparison of the dynamics of electron fluxes in different orbits and the geomagnetic field variations for February 15‒22, 2014 indicate that the main mechanisms of the evolution of outer electron radiation belt are global processes: (i) outward and inward shifts of the trapped electron population inside the Earth’s magnetosphere due to large-scale variations of the magnetospheric magnetic field during geomagnetic disturbances and (ii) ExB drift of electrons from the magnetotail under the influence of electric and magnetic fields. Local particle acceleration is auxiliary process in the dynamics of radiation belts. The southward orientation of the interplanetary magnetic field is the necessary condition for an increase in the intensity of electron fluxes of the Earth’s outer radiation belt, while the function (–B_zV_sw) is the key external factor.

中文翻译：

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2014年2月地球磁层的外电子辐射带的磁场变化和动力学

摘要—

本文基于在国外辐射带核中获得的实验数据，对2014年2月15日至22日地球外部辐射带的相对论电子通量的动力学以及相应的环流和磁层磁场变化进行了比较分析的结果。范·艾伦（Van Allen）探测卫星并进入GOES-15卫星的地球静止轨道。磁层的A2000抛物面模型用于计算主要磁层电流系统对Dst的贡献变异。考虑了外部因素（太阳风和行星际磁场）的影响。比较不同轨道上的电子通量动力学和2014年2月15日至22日的地磁场变化，发现外电子辐射带演化的主要机制是整体过程：（i）被困电子的向外和向内移动由于在地磁扰动期间磁层磁场的大规模变化，以及（ii）在电场和磁场的影响下，电子从磁尾中的ExB漂移，导致地球磁层内部的电子密度增加。局部粒子加速是辐射带动力学的辅助过程。B _z V _sw）是关键的外部因素。