Although less well-known that other volcanic giants of the Cascades (particularly Mount St. Helens), this underwater volcano is actually the most active one in the Pacific Northwest. With eruptions in ...

It appears that these magma bodies exist beneath volcanoes over their whole lifetime, not just during an active state.' ...

One of the world's most active volcanoes erupted over 1,000 times in the first 19 days of 2025, producing ash clouds over two miles high.