View larger. | Aurora borealis or northern lights seen over Wisconsin on June 6, 2013, as captured by Jeremy Friebel. Visit Jeremy on Facebook.

A moderately strong geomagnetic (G2) storm took place last night (June 6, 2013). A K index of 6 was expected (the higher the K index, the stronger display of northern lights can be expected). The Space Weather Prediction Center said the effects of the storm might include auroras, or northern lights, dipping to latitudes as low as those of the northern U.S. And indeed Jeremy Friebel in Wisconsin was able to see and capture the northern lights last night. He wrote:

At 10 p.m. it started with a single green pillar and then it went crazy for 15 minutes. This is at the peak of the storm, which lasted for about an hour in Menasha, Wisconsin.

Thank you, Jeremy!

At this writing (June 7 at 5 a.m. CDT or 1000 UTC), a minor (G1) geomagnetic storm is still in progress with a K index of 4. Look here for today’s aurora forecast, from the Geophysical Institute at the University of Alaska.

Wisconsin wasn’t the only northern U.S. state that saw the northern lights last night (June 6-7, 2013). EarthSky Facebook friend Ed Nephler in Bliss, Michigan captured this photo. Thank you, Ed.

Deborah Byrd

Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.