The solar storm that's pushing sightings of the Northern Lights to lower latitudes is forecast to continue into the coming days, but its impact has likely peaked.
A powerful solar storm struck Earth, triggering spectacular celestial light shows in skies around the world — and threatening possible disruptions to satellites and power grids.
Scientists have updated their forecast for the current solar cycle, which usually lasts about 11 years. Solar activity is now expected to peak earlier and to be stronger than previously thought.
This week's geomagnetic storm will bring the aurora borealis further south. The Space Weather Prediction Center says the best time to view the aurora borealis is between 10 p.m. and 2 a.m. local time.
The Northern Lights, known scientifically as auroras borealis, are triggered by geomagnetic activity from the sun. They typically occur closer to the North Pole, near Alaska and Canada.
An article suggests the natural light show starts when disturbances on the sun pull on Earth's magnetic field, creating cosmic waves that launch electrons into the atmosphere to form the aurora.
It was the members of a Facebook group who noted that the auroras they'd seen didn't look like any that had been previously catalogued. So physicists asked them to take a few carefully timed photos.
Wednesday night's aurora borealis forecast was particularly strong, so Icelandic officials tried to reduce light pollution to make the green glow more visible to people in the capital.
If you weren't far enough in the north — or well-rested enough – to see the show, don't worry: stunning images were posted to Twitter and elsewhere. Here's a selection.