Thirty years (and one day) ago, Mount St. Helens blew its top. Or rather, its side. After months of heightened seismic activity, a 5.1 magnitude earthquake caused the flank of the mountain to suddenly ...

MOUNT ST. HELENS NATIONAL VOLCANIC MONUMENT — Amid children’s excited chatter and giggles, the first signs of a volcanic eruption — harmonic tremors — spread at the base of Mount St. Helens. Nearly 60 ...

MT. ST. HELENS, Wash — For many people who lived through the 1980 eruption of Mount Saint Helens, it is the biggest news story of their lifetimes. 45 years ago, the mountain that had been rumbling for ...

Evidence of deadly ash clouds deep in the country’s underground caves shows there’s no escaping massive volcanic eruptions.

Sunday marks the anniversary of the May 18, 1980, volcanic eruption that rocked the Northwest. Geologist Carolyn Driedger recounts the haunting day before that catastrophic event — and its lasting ...