G2-class geomagnetic storm in progress

A solar wind stream blowing faster than 700 km/s is lashing Earth's magnetic field on Aug. 31st. This has sparked a G2-class (moderately strong) geomagnetic storm.
So far auroras have been observed in Iceland, Alaska, Finland, Wisconsin and Michigan--with more expected tonight if the storm continues.
Visit Spaceweather.com for photos and updates