One of the most deadly and dangerous volcano hazards isn’t lava. Mudflows called lahars can come without clear warning.

A volcanic eruption at national park triggered explosive rock storm & ash plume forcing emergency evacuations Scientists warn of continued seismic activity ...

Something stirred beneath Mount Rainier this summer, sending over 1,000 earthquakes through the ground in weeks—the largest swarm ever recorded at this towering volcano. Seismometers glowed with ...

Millions of tonnes of ash and rock from an erupting Philippine volcano could bury nearby communities due to heavy rain, authorities said Saturday, as tens of thousands flee over fears of a deadly ...

An outpouring of magma isn’t the biggest risk to people downhill from Mount Rainier. The active volcano’s greatest danger comes from lahars — amalgams of mud, rock and water that are as dense as wet ...

Search operations resumed on Thursday after flash floods mixed with volcanic debris from Mount Merapi receded in Magelang, Central Java, Indonesia’s ...

Mount Rainier has rattled through thousands of tiny earthquakes this year, a reminder that America’s most lethal volcano is very much alive beneath its ice. Those quakes, and a burst of viral alarmism ...