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 ...

The eruption of May 18, 1980, reduced the summit of Mount St. Helens by 1,300 feet. But that was not the only geologic event that has reduced its profile. During its eruptions from 2004 to 2008, Mount ...

Scientists at the USGS Hawaiian Volcano Observatory had been collecting data and forming a hypothesis that Kilauea’s south ...

Episode 37 of the ongoing Halemaʻumaʻu eruption began at 2:30 p.m. HST on Nov. 25, according to the Hawaiian Volcano ...

Equal parts terrifying and beautiful, volcanoes represent the sheer power of nature. Some, like Sicily’s Mount Etna, are known for their frequent bursts of activity, while others have lain dormant for ...

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 ...

The volcano on the Scottish peninsula Ardnamurchan is a popular place for the study of rocks and structures in the core of a volcano. Geology students read about it in text books and geologists have ...

How do volcanologists know what a volcano is going to do? Each volcano, like each individual person, has its own unique “personality.” You may know, for example, that you can tease your brother ...

Kilauea continued to erupt wildly on Hawaii’s Big Island this week, shooting lava hundreds of feet into the air and burning homes to the ground. As of Sunday night, 10 fissure vents were open in the ...

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: ...