Peculiar solar sources and geospace disturbances on 20-26 August 2018

A. A. Abunin, M. A. Abunina, A. V. Belov +1

On the approach to minimum of Solar Cycle 24, on 26 August 2018, an unexpectedly strong geomagnetic storm (GMS) suddenly occurred. Its Dst index reached -174 nT, that is the third…