Social media videos showed people running into the streets as bright orange flames and smoke spewed into the sky.

A mud volcano erupted in San Juan de Urabá, Antioquia, killing livestock and damaging roads. Authorities have set up a safety ...

One of the most explosive volcanoes in U.S. history began its eruption with a trickle, not a blast. Mount St. Helens' gas-laden magma oozed into the cone before the mountain finally erupted in 1980.

The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped ...

When individuals hear volcanoes, they tend to envision blazing eruptions blasting into the air. However, volcanoes can also collapse sideways, with their sides, or flanks, collapsing. Such a collapse ...

With monstrous plumes bursting from the water and shimmery streaks of electric light, Devon Massyn said it was one of the craziest things he has ever experienced.

Washington state may not have to worry about hurricanes, but it is volcano country. The United States has 161 active volcanoes – all in the western U.S. – but only 18 are classified as a "very high ...