Dramatic new footage from Santiaguito volcano captures its intense activity, with drone and thermal imagery revealing ...

Deep within the Yellowstone Caldera, the bowl-shaped rock cauldron at the heart of Yellowstone National Park, there’s a clue ...

That movement has now left one pool of molten material on the west of the caldera disconnected from any heat sources, which will likely allow it to cool. Meanwhile, the largest pool of near-surface ...

The USGS Hawaiian Volcano Observatory spearheads Volcano Awareness Month each January on the Island of Hawaii. This year, in ...

Though basaltic eruptions are more common worldwide, the Yellowstone Caldera was formed by a rhyolitic eruption that launched magma with the same consistency as asphalt into the air, as Michael ...

Scientists have long assumed that Yellowstone possesses a single magma reservoir, which can feed both "gentle" basaltic eruptions and explosive rhyolite eruptions. The latter are the focus of ...

Though the volcano’s magma chambers could hold enough material for a caldera-forming event, none of them are likely to erupt soon.

The basaltic melt, which sits deeper in the Earth ... in the pocket could eventually increase enough to cause another eruption. Other magma pockets found around the volcano site do not reach ...

Without an underlying heat source, rhyolitic magma in western Yellowstone caldera will continue to cool, and rhyolite eruptions in this region will eventually cease. Northeast of the caldera, however, ...