'TIS THE SEASON FOR STEVE: Last night, a river of hot ionized gas surged through the upper atmosphere above Alaska, creating a luminous arc in the sky that rivaled the nearby Moon. Researchers call the phenomenon "STEVE." Sky watchers around the world have been reporting similar arcs in recent weeks. They are related to auroras, but not the same. New research suggests that now is the season for STEVE. The onset of northern Spring seems to lure the arc out of winter hiding. Visit Spaceweather.com for the full story.
Above: A luminous arc cuts across the night sky near Anchorage, Alaska, on March 25, 2018. Photo credit: Sanjana Greenhill. For more sightings, visit Spaceweather.com's Realtime "Steve" Photo Gallery.
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