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 ...

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 ...

The southernmost active volcano on the planet is Antarctica's Mount Erebus. It is also home to Earth's only long-lived lava lakes. "Lahar" is an Indonesian word that refers to a type of volcanic flow: ...

Editor’s note: The KOIN 6 Weather team is presenting weather and science lessons to help serve our teachers and students. Click here for more lessons. PORTLAND, Ore. (KOIN) – The mighty mountains of ...

I’m going to make you a bet. I reckon within the next week, a story about a volcano somewhere in the world will make headlines that, at the very least, imply an eruption is around the corner. There ...

Thirty-five years ago, Mount St. Helens in southwest Washington state erupted, killing 57 people, blasting more than 1,300 feet off the top and raining volcanic ash for miles around. Today, the ...

Lava is molten rock from a volcano that reaches the Earth’s surface. Liquid rock below the Earth’s surface is referred to as magma. More than 50% of the world’s active volcanoes above sea level ...

Klyuchevskaya Volcano on Russia's Kamchatka Peninsula is the largest active volcano in the Northern Hemisphere. A caldera is the circular depression in the center of a volcano's summit that forms ...