Abstract

The response of strong magnetic storms in variations of the electric field of the near-ground atmosphere of the midlatitudes are studied according to data from long-term observations of aeroelectric (Ez) and geomagnetic fields at the midlatitude Borok Geophysical Observatory. For the period 1998–2015, 19 strong and very strong magnetic storms with a minimal Dst index of < –100 nT and a maximal index value of Kp > 7, which correspond to undisturbed meteorological conditions of the lower atmosphere (i.e., good weather conditions), are identified at Borok Observatory. The effect of a magnetic storm on changes in the electric field of the near-surface atmosphere is shown to be more efficiently manifested in the daytime around noon. A statistically significant variation in the strength of the aeroelectric field was found. It was characterized by an increase in the Ez value over a time interval of ±4 h relative to the time of the minimum of the Dst variation of the magnetic storm.

中文翻译：

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中纬度大气电场中磁层风暴的响应

摘要

根据中纬度Borok地球物理观测站对航空电（Ez）和地磁场的长期观测数据，研究了中纬度近地大气电场变化中强磁暴的响应。在1998-2015年期间，发生了19次强和非常强的磁暴，其Dst指数小于–100 nT，Kp的最大值Borok天文台确定> 7，这对应于较低大气层的不受干扰的气象条件（即良好的天气条件）。在中午左右的白天，更有效地显示了磁暴对近地表大气电场变化的影响。发现了航空电场强度的统计学显着变化。其特征是，相对于磁暴的Ds t变化最小的时间，在±4 h的时间间隔内Ez值增加。