Thursday, August 5, 2010

Aurora Alert! Solar Storm Reaches Earth

 Finally, some excitement from the Sun! On August 1, 2010, the entire Earth-facing side of the sun erupted with all sorts of activity. There was a C3-class solar flare, a solar tsunami, multiple filaments of magnetism lifting off the stellar surface, large-scale shaking of the solar corona, radio bursts, a coronal mass ejection (CME) and more. (Watch the movie from the Solar Dynamics Observatory spacecraft for all the action!) As I write this, the solar storm is beginning to reach Earth with one, and possibly two CMEs, according to You can actually watch realtime data coming in from two of the GOES satellites at this link from NOAA's Space Weather Prediction Center, which measures proton flux in the space environment around Earth. The page refreshes every 5 minutes.

NOAA forecasters are estimating a 10% chance of major geomagnetic storms and a 45% chance of at least some geomagnetic activity when the clouds arrive on August 3rd and 4th, so those of you in the northern latitudes should be on the lookout for aurorae on both August 3 and 4.
Readers, anyone who captures aurorae images, send them in to Nancy
This has been an unusually quiet solar cycle. We are heading towards a solar max in three years which is on track to be just over half as intense as the last one in 2001, and the lowest in over 100 years.


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