Solar Activity
Posted by
JAC on 12/22/2009, 6:52 am
The sun is showing signs of life.
There are no fewer than five active regions on the sun's surface, shown here in an extreme ultraviolet photo taken this morning by the Solar and Heliospheric Observatory (SOHO):

After two years of record-low sunspot numbers and many month-long stretches of utter quiet, this is a notable outbreak.
Whether it heralds a genuine trend or merely marks a temporary, statistical uptick in activity remains to be seen.
Stay tuned!

The GOES X-ray Flux plot contains 5 minute averages of solar X-ray output in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom (0.05-0.4 nm) passbands.

Space Weather Message Code: ALTTP2 Serial Number: 693 Issue Time: 2009 Dec 22 0533 UTC
ALERT: Type II Radio Emission Begin Time: 2009 Dec 22 0457 UTC Estimated Velocity: 531 km/s
http://www.swpc.noaa.gov/alerts/timeline_desc.html
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