A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say.

Researchers used seismic tomography to reveal that fluid buildup, not magma, is driving Uturuncu’s deformation, indicating ...

The 1980 Mount St. Helens eruption began with a steady series of earthquakes in March. By April it began spewing smoke, ...

According to the USGS, Mount St. Helens is the most active volcano in the lower 48 states and the most likely in the Cascades to erupt again.

Alaska, Hawaii and areas along the mainland West Coast would be at risk if an earthquake erupts along the Cascadia subduction ...

Mount Lewotobi Laki-Laki on Indonesia's tourist island of Flores is erupting again, drawing warnings from the government and ...

Sunday marks 45 years since Mount St. Helens erupted in Washington state. The deadly eruption happened shortly after 8:30 a.m ...

57 people died in the eruption, but the disaster gave scientists a way to develop monitoring tools, improving their ability ...

The May 18, 1980, eruption of Mount St. Helens in southern Washington claimed 57 lives and blasted the terrain of old-growth ...