CRACKLING SUNSPOT
Posted by
JAC on 1/21/2010, 9:42 am
![](http://www.spaceweather.com/images2010/20jan10/stereob_m2_anim.gif?)
M2-flare recorded by STEREO-B at 1756 GMT on Jan. 20th
Sunspot 1041 (a.k.a. "old sunspot 1039") is crackling with solar flares.
Over the past few days, it has produced five M-class eruptions.
The ongoing sequence of flares signals a sharp upturn in solar activity.
Before this week, the last time the sun produced even a single M-class solar flare was in March 2008--almost two years ago.
M-class solar flares have a moderate effect on Earth.
Mainly, they boost the ionization of Earth's upper atmosphere and disturb the propagation of terrestrial radio signals.
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Ionospheric Distrubance -
JAC,
1/20/2010, 6:21 am Post A Reply
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