Deadliest volcanic eruption: The 1815 eruption of Mount Tambora in Indonesia, which killed up to 100,000 people From lava fountains to towering ash clouds, volcanoes produce some of the most dramatic ...

(CNN) — Here's some background information about volcanoes, mountains that open downward to a reservoir of molten rock. Facts: More than 80% of the Earth's surface, both above and below sea level, is ...

A volcano is an opening in the Earth's crust that allows molten rock, gases, and debris to escape from below the surface. The ...

Here’s a look at volcanoes, mountains that open downward to a reservoir of molten rock. More than 80% of the Earth’s surface, both above and below sea level, is of volcanic origin. Lava is molten rock ...

Cataclysmic volcanic eruptions are rare — but inevitable. Governments should not only work to stem global warming, but also prepare for other extreme events with a planet-wide impact. The 1815 massive ...

More than 1,400 volcanoes dot the Southwestern United States. At least three erupted in the past 1,000 years, which is practically yesterday in geologic time. Experts and disaster officials are ...

When the crew aboard the research vessel Sonne set out on a cruise last spring, they were expecting a routine mapping expedition in the South Pacific. But they were in for a big surprise. They ended ...