The probability of nifty northern lights in a couple nights from now, is significant.
I happened to be out taking a photo of the very large sunspot facing Earth, since I noticed it was getting some press on my 3D Sun app on my phone. The welding filter I used for the Venus transit came in handy again.
EARTH-DIRECTED X-FLARE: Big sunspot AR1520 erupted on July 12th around 16:53 UT, producing an X-class solar flare and hurling a CME directly toward Earth. Forecasters expect the cloud to arrive on July 14th. Its impact could spark moderate to severe geomagnetic storms, allowing auroras to be seen at lower latitudes than usual. Check http://spaceweather.com for more information and updates.