The recent earthquake swarm near Santorini has brought the topic of volcanoes in Greece back into the spotlight.

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.

Add Yahoo as a preferred source to see more of our stories on Google. Image of active volcano shows magma pressure inside volcanoes can destabilize slopes and trigger collapse. (CREDIT: YouTube / CC ...

The Axial Seamount – located hundreds of miles off the coast of Oregon and nearly 5,000 feet below the Pacific Ocean’s waves – erupted in April 2015, spewing a mile’s worth of lava onto the sea floor.

A dramatic eruption forced residents and visitors to flee when a volcano suddenly burst to life, sending ash and debris high into the sky. Witnesses described the ground shaking violently as thick ...

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 ...

In 1883, Krakatoa exploded over Indonesia, unleashing the deadliest eruption in modern memory. A gallery of some of its most spectacular successors suggests that a similar disaster may lurk beneath ...

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 ...