BIG AURORAS: Yesterday, Sept. 11th, a stream of solar wind and a minor CME hit Earth’s magnetic field almost simultaneously. The result was a strong (G3-class) geomagnetic storm that sparked bright lights around the Arctic Circle. Veteran aurora photographer Ole Salomonsen says “it was not only the best display of the season so far, but maybe one of the best I have ever witnessed.” He sends this self-portrait, an aurora silhouette, from Tromsø, Norway:
“I could not resist putting my self into the shot to show the scale of things,” he says. “It looks out of proportion, but this is how it really was! The auroras were enormous.”
The storm is subsiding now, but it could flare up again as Earth passes through the wake of the CME. NOAA forecasters estimate a 70% chance of polar geomagnetic storms on Sept. 12th.