Abstract

A study of MHD waves in solar wind plasma during two geoeffective space weather events in February–March 2023 is reported. At that time, various geophysical phenomena were observed on Earth: intense magnetic storms, decreases in the intensity of galactic cosmic rays, auroras, and a number of other manifestations of space weather. To study the situation in near-Earth outer space, we used data from direct measurements of the parameters of the interplanetary medium with the DSCOVR and ACE spacecraft. The application of spectral analysis methods to the data of direct measurements of the solar wind parameters onboard the DSCOVR spacecraft made it possible to study the characteristics and dynamics of Alfén, fast, and slow magnetosonic waves in the inertial frequency range (from ∼0.0001 to ∼0.01 Hz) of the observed solar wind turbulence spectrum during these events.

中文翻译：

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2023 年 2 月至 3 月地磁风暴事件期间太阳风等离子体中的 MHD 波

摘要

据报道，对 2023 年 2 月至 3 月两次地球效应空间天气事件期间太阳风等离子体中的 MHD 波进行了研究。当时，在地球上观察到了各种地球物理现象：强烈的磁暴、银河宇宙射线强度的减弱、极光以及许多其他太空天气的表现。为了研究近地外层空间的情况，我们使用了 DSCOVR和ACE航天器直接测量行星际介质参数的数据。将光谱分析方法应用于DSCOVR航天器上直接测量太阳风参数的数据，使得研究惯性频率范围内（~0.0001 至~~）阿尔芬、快、慢磁声波的特性和动力学成为可能。 0.01 Hz）在这些事件期间观测到的太阳风湍流光谱。