Hidden in the Pacific, two very different volcanoes are forcing scientists to rethink what counts as “biggest.” Tamu Massif, a shield-like giant buried beneath the northwest Pacific, spent years ...

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 ...

Volcanoes can look like small mountains or hills. A volcano is an opening in the Earth's crust that allows magma, hot ash and gases to escape. Composite volcanoes are the most common type of volcano.

Lassen Peak had its most powerful explosion in a series of eruptions that occurred between 1914 and 1917. Take a look at ...