(Mount Saint Helens, Washington-NBC/AP) Oct. 13, 2004 - There were more steam emissions from Mount St. Helens in Washington overnight, along with continued seismic activity. Scientists describe it as ...

An image of a 65-foot-tall lava dome was shared last week by the U.S. Geological Survey. The "Throwback Thursday" image was originally taken Oct. 11, 1969, nearly a half-century ago. A spectacular ...

Lava domes form at the top of many volcanoes when viscous lava erupts. When they become unstable, they can collapse and cause a hazard. An international team of researchers has analyzed summit dome ...