Extreme (X8.79) Solar Flare Posted by jwjohnson314 on Tuesday May 14, 2024 @01:29PM from the spaceweatherlive.com dept. https://www.spaceweatherlive.com/en/solar-activity.html ( 3 comments | 6 points | on HN )
EM waves is probably around 8 minutes (number I heard for visible light), but then the solar wind goes slower, I think.