NEW SOURCE OF FLARES: Suddenly, AR3445 is crackling with activity. The mixed-polarity sunspot has produced multiple #M-class #flares this weekend, including this M4-category explosion on Sept.24th (0328 UT):

A flash of extreme #ultraviolet #radiation from the #flare ionized the top of Earth's atmosphere, causing a shortwave radio blackout over #Australia: map. Mariners and ham radio operators may have noticed loss of signal at frequencies below 25 MHz for as much as 30 minutes after the flare.

This flare might have lasted long enough to lift a #CME out of the sun's atmosphere.
https://spaceweather.com/