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A geomagnetic storm that began on Sept. 3rd when a coronal mass ejection (CME) hit Earth's magnetic field is subsiding now. The impact at 1200 UT induced significant ground currents in the soil of northern Scandinavia and sparked bright auroras around the Arctic Circle
CME IMPACT SPARKS AURORAS: A minor CME hit Earth's magnetic field on February 7th. The light show it produced was anything but minor. "BANG!" says Truls Tiller of Tromsø, Norway. "The sky exploded in auroras." In every direction he turned, he saw a scene like this.
SPOOKY AURORAS: High-latitude sky watchers should be alert for auroras on Halloween. A CME is expected to hit Earth's magnetic field on Oct. 31st, possibly sparking polar geomagnetic storms. In northern Norway, the show got started early with this display on Oct. 30th.
Northern Lights... one day.
GEOMAGNETIC STORM ALERT: A geomagnetic storm is in progress in the wake of a double CME impact on June 16th. The hit, which strongly compressed Earth's magnetic field, lit up both poles with bright auroras. Stephen Voss sent this photo from Southland, New Zealand: