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Sunspot complex AR1520-1521 erupted again on July 19th, this time producing an M7-class solar flare that almost crossed the threshold into X-territory. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash.
The explosion produced a bright coronal mass ejection:
Although the explosion occured on the other side of the sun's western limb, our planet could feel some effects. The blast site is magnetically connected to Earth by backward-spiraling lines of magnetic force. Protons accelerated by the flare are being guided to us by those lines of magnetism, and a radiation storm is underway.
Thank you for watching and have a great day.
Trudi
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