Source - Space Weather News for Sept. 3, 2012: http://spaceweather.com
CME IMPACT: As expected, a coronal mass ejection (CME) hit Earth's
magnetic field on Sept. 3rd at approximately 1200 UT (5 am PDT). The
impact induced measurable ground currents in the soil of northern
Scandinavia and sparked bright auroras around the Arctic Circle. At the
time this alert is being issued, a moderately strong (Kp=6) geomagnetic
storm is underway. Check http://spaceweather.com for photos and updates.
STORM ALERTS: Subscribers to our Space Weather Alert service were
alerted by phone when the CME hit and when the subsequent storm began.
You can sign up for alerts at http://spaceweathertext.com (text) or http://spaceweatherphone.com (voice).