Level S4 solar radiation event

https://news.ycombinator.com/rss Hits: 6
Summary

G4 Levels were first reached at 2:38pm EST (1938 UTC) on 19 January, 2026 upon CME shock arrival. CME passage is expected to continue through the evening with G4 levels remaining possible.

First seen: 2026-01-19 22:32

Last seen: 2026-01-20 03:32