Widely shared social media posts claimed a massive underwater volcano "the size of a city" was "showing signs it could erupt any day now" in July 2025. The volcano, which is apparently off Oregon's coast, is " completely unpredictable" and could "blow tomorrow" or later in the year, according to the posts.

Icelandic authorities now say threats of wildfires have officials on "high" alert and that eruption fissures were bigger than scientists initially thought after Wednesday's eruption of the once-dorman

After two hours of seismic activity, the volcano began erupting at the Sundhnukur crater range -- about 30 miles southwest of Reykjavik -- just before 4 a.m. local time, the Icelandic Meteorological Office announced.