NOAA forecasters report that the interaction region between fast and slow streams of solar wind will reach Earth on may 19. The solar wind plasma accumulates in these regions, producing density gradients and shock waves, strong magnetic fields often cause geomagnetic storms.
But that’s not all, after the passage of the Earth through this region flow high speed solar wind will arrive may 20. He emerges from large coronal holes on the Sun. The combined effect of these two events is likely to lead to geomagnetic storm on 20 may. High-latitude sky watchers can see the Aurora, especially in the southern hemisphere.