The impact lifted the solar wind speed from 300 km/s to 700 km/s and sparked a moderately strong (Kp=6) geomagnetic storm. Northern Lights spilled across the Canadian border into the United States as far south as Colorado.Meanwhile, auroras were also seen in the far Southern Hemisphere (for example, in Australia). The geomagnetic storm from the March 15 CME continued to spark auroras Sunday night, although on Sunday night we didn’t hear of any mid-latitude auroras. The reports we got were from places like Sweden, Norway and Finland.
Read more about why this past weekend was so good for auroras
Tony Bateman – EarthSky friend on Facebook, from Korpo (formerly part of Finland) – captured the video below on March 17. He wrote:
About 6 Hours of aurora in under 1.35 minutes of video. Solar storm of 17th March 2013. Reached KP7 strength for many hours. The whole sky was filled in all directions, this video caught a small amount of the show.