Geomagnetic disturbances, which began with the impact of a coronal hole in the Sun, unexpectedly grew to the level of a magnetic storm, reported late in the evening of October 31 at the Solar Astronomy Laboratory of the Space Research Institute (AD) of the Russian Academy of Sciences.

Geomagnetic disturbances, which began with the impact of a coronal hole in the Sun, unexpectedly grew to the level of a magnetic storm, reported late in the evening of October 31 at the Solar Astronomy Laboratory of the Space Research Institute (AD) of the Russian Academy of Sciences.