The paper summarizes the issues related to relationships between the PC index and magnetic disturbances: threshold level of the PC index required for the disturbances beginning, delay time in response of magnetic substorms and storms to the PC index growth, relation of PC index to magnetospheric field-aligned currents in course of substorm, different types of magnetic substorms (isolated, expanded, delayed, sawtooth) and magnetic storms (classic, pulsed and composite) and their relation to different regularities in the PC index alterations, linear dependence of the substorm and storm intensities on value of the preceding of PC index, special features of magnetic activity in the winter and summer polar caps, variations of PC index and magnetic disturbances in course of the 23/24 solar activity cycles. New aspects that have arisen due to the PC index application are concerned with the threshold-dependent mode of the substorm development and regular repeateness of sawtooth substorms occurring under conditions of steady powerful E_KL field. The experimental results examined in the paper are indicative that the PC index serves as an indicator of the solar wind energy which comes in the magnetosphere and then realizes in the form of magnetosphere disturbances. This paper follows the review of Troshichev (Front Astron Space Sci 9:1069470, 2022), where the relationships between the solar wind electric field E_KL and PC index have been examined.

本文总结了PC指数与磁扰动关系的相关问题：扰动开始所需的PC指数阈值、磁亚暴和磁暴对PC指数增长响应的延迟时间、 PC指数与磁层场的关系-亚暴过程中的对齐电流、不同类型的磁亚暴（孤立、扩展、延迟、锯齿）和磁暴（经典、脉冲和复合）及其与 PC指数变化的不同规律的关系、亚暴的线性相关性和风暴强度对PC指数前值的影响，冬季和夏季极冠磁活动的特殊特征，PC指数的变化以及23/24太阳活动周期过程中的磁扰动。由于PC指数的应用而出现的新方面涉及亚暴发展的阈值依赖模式以及在稳定强大的E _KL场条件下发生的锯齿状亚暴的规律性重复。本文检验的实验结果表明，PC指数可以作为太阳风能进入磁层并以磁层扰动的形式实现的指标。本文遵循 Troshichev 的综述（Front Astron Space Sci 9:1069470, 2022），其中研究了太阳风电场E _KL和PC指数之间的关系。