One of the most explosive volcanoes in U.S. history began its eruption with a trickle, not a blast. Mount St. Helens' gas-laden magma oozed into the cone before the mountain finally erupted in 1980.
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Why some volcanoes don't explode
The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped ...
It looks like just another hill in Sussex County, but you wouldn’t have wanted to have been standing there 420 million years ago. That’s about when the Beemerville Volcano erupted in Wantage, give or ...
POPOCATÉPETL VOLCANO, Mexico (AP) — In the predawn darkness, a team of scientists climbs the slope of Mexico’s Popocatépetl volcano, one of the world’s most active and whose eruption could affect ...
About 290 miles off the coast of Cannon Beach, Oregon, lies an underwater volcano called Axial Volcano. Axial erupts about once every ten years. Twice in the past year, news outlets have reported that ...
A week-and-a-half after episode 41 of Kilauea’s yearlong summit eruption deposited tephra — lightweight volcanic glass debris — over a sizable area surrounding Halema‘uma‘u crater, residents of ...
On Sunday, November 23, 2025, Hayli Gubbi, a volcano in Ethiopia's Afar Region, erupted for the first time in recorded history. Scientists think the last time this volcano blew was somewhere between ...
In southeastern Iran, about 31 miles from the closest city, the volcano known as Taftan is stirring. Though Taftan has no recorded history of confirmed eruptions, recent research has revealed that the ...
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