When a major solar storm hit in 1859, "telegraph systems worldwide went haywire." Here's what to know if such an event were to hit today – and how likely it is to happen.
@ham_bitious Sunspots=blackouts-propagation. We don't get propagation without noise.
The key for hams is that the noise drops at night, but the ionosphere takes more hours to deionize itself, and the propagation persists for a few hours.