Jan Mikael (4 Aug 2010)
"INFO: CME impact sparks geomagnetic storm"

 
Space Weather News for August 3, 2010
 http://spaceweather.com

 CME IMPACT: As expected, a coronal mass ejection (CME) hit Earth's
 magnetic field on August 3rd.  The impact, which occurred around 1730 UT,
 sparked a polar geomagnetic storm.  At the time that this alert is being
 written, sky watchers in Europe as far south as Germany are reporting red
 and green Northern Lights.  If the storm sustains itself for a few more
 hours, people in North America might see a similar display. Sky watchers
 in Alaska, Canada, and northern-tier US states such as Wisconsin,
 Minnesota and Maine should be alert for auroras.