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.
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ACKNOWLEDGMENTS
We thank NOAA, ACE Science Centers, and the Data Analysis Center for Geomagnetism and Space Magnetism (Kyoto University) for providing free access to data from the DSCOVR and ACE spacecraft, as well as information on the current values of the Dst index of geomagnetic activity.
Funding
This work was supported by the Russian scientific foundation, project no. 22-22-20045.
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Translated by E. Seifina
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Starodubtsev, S.A., Gololobov, P.Y., Grigoryev, V.G. et al. MHD Waves in Solar Wind Plasma during Geomagnetic Storm Events in February–March 2023. Cosmic Res 62, 178–186 (2024). https://doi.org/10.1134/S0010952523600312
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DOI: https://doi.org/10.1134/S0010952523600312