Reversed-polarity #sunspot AR3296 just unleashed a #double #solar #flare. Watch the closely-space explosions in this movie from NASA's Solar Dynamics Observatory:

Extreme ultraviolet radiation from the double blast ionized the top of #Earth's #atmosphere, causing a shortwave radio blackout over North America and the Pacific Ocean. Mariners and ham radio operators may have noticed loss of signal at frequencies below 25 MHz between 1900 and 2100 UT (May 9th

https://spaceweather.com/