Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2022, Vol. 19, No. 3, pp. 297-301
Geophysical phenomena during the solar activity surge in October – November 2021
V.L. Yanchukovsky
1 , A.Yu. Belinskaya
1 1 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia
Accepted: 14.06.2022
DOI: 10.21046/2070-7401-2022-19-3-297-301
In the article, the authors analyze the beginning of a new 25th cycle of solar activity. The first big burst of activity of the new cycle consisted of a series of solar flares of various classes, which were observed in October – November 2021. The reaction of various geophysical parameters to this surge in solar activity is considered based on the results of continuous monitoring of cosmic rays, the geomagnetic field and the ionosphere in Novosibirsk. Solar flares from this series on November 1 and 2 caused a large Forbush-decrease in galactic cosmic rays (up to 13 % at mid-latitudes), the largest geomagnetic storm and disturbances in the ionosphere in recent years, as well as an increase in the number and magnitude of earthquakes. The ionospheric disturbance, which was positive on November 1–3, and after the onset of the magnetic storm there was a prolonged decrease in the critical frequency of the F2 layer until November 8, demonstrates a longitude effect along 52–55° N.
Keywords: solar activity, cosmic rays, ionosphere, geomagnetic storm
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