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.

An official said the eruption near Reykjavik, the 12th in four years from the same volcanic system, posed no threat to people or infrastructure.

A volcano erupted on July 16, 2025 in southwest Iceland, emitting smoke and dramatic flows of glowing hot yellow and orange lava.