LONG-DURATION SOLAR FLARE: Growing sunspot AR3032 exploded on June 13th (0407 UT), producing an M3-class solar flare that lasted more than 3 hours. NASA's Solar Dynamics Observatory recorded the slow-motion blast:

Extreme ultraviolet radiation from the flare caused a shortwave radio blackout over Japan and southeast Asia, affecting frequencies below 30 MHz: blackout map. Also, the explosion probably hurled a CME into space. The US Air Force detected a Type II solar radio burst, which is usually caused by shock waves in the leading edge of a CME. Confirmation awaits fresh data from SOHO coronagraphs Stay tuned. Solar flare alerts: SMS Text.

Spaceweather.com