Volcano Kilauea's puahiohio are swirling columns of ash and volcanic debris, often mistaken for tornadoes but formed by ...

America’s deadliest volcano has just rattled through more than 1,000 tiny earthquakes in a matter of days, a drumbeat of tremors that has revived old fears about catastrophic mudflows racing down its ...

Alaska volcano researchers say seismic activity around Mount Spurr has continued to decline over the last month, but the closest active volcano to the state’s population centers could still erupt. In ...

Over the past century, technological advancements have vastly improved volcano monitoring. One key innovation was the introduction of modern borehole tiltmeters, devices that measure very small ...