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首页> 外文期刊>Earth, planets and space: EPS >Local time variation of the amplitude of geomagnetic sudden commencements (SC) and SC-associated polar cap potential
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Local time variation of the amplitude of geomagnetic sudden commencements (SC) and SC-associated polar cap potential

机译：地磁突然起伏（SC）和与SC相关的极顶电势的振幅的本地时间变化

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摘要

Local time (LT) variations of the averaged H-component amplitude of geomagnetic sudden commencements (SCs) observed at Memambetsu (geomagnetic latitude 35.4) are derived separately for the summer and winter season. The amplitude was found to be higher at nighttime than daytime in both seasons, and the LT variations showed a good agreement with calculated LT variations of the resultant magnetic field due to a pair of fieldaligned currents (FACs) and ionospheric currents produced by the FACs. The DL- and DP-component of the disturbance field of SC can be separated based on a comparison of the observed and calculated LT variations. A method is introduced by which we can estimate the potential voltage difference associated with the FACs in the polar cap.
机译：分别在夏季和冬季分别推算在Memambetsu（地磁纬度35.4）处观测到的地磁突然开始（SC）的平均H分量振幅的当地时间（LT）变化。发现在两个季节中，夜间的振幅都高于白天，并且由于FAC产生的一对场对准电流（FAC）和电离层电流，LT变化与合成磁场的LT变化计算出良好的一致性。 SC干扰场的DL和DP分量可以根据观察到的和计算得到的LT变化的比较来分离。引入了一种方法，通过该方法，我们可以估计与极性帽中的FAC相关的潜在电压差。

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