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.

Far off the Oregon Coast, a restless underwater volcano has been rattling the seafloor with swarms of tiny earthquakes, including a burst that reached roughly 10,000 quakes in a single day. That ...

Volcanic eruptions are perhaps nature's most terrifying display of power. Catastrophic eruptions of volcanoes like Mount Vesuvius, Krakatoa, and Mount St. Helens have gone down as some of the most ...