During a two-week trip to American Samoa in August and September, USGS Hawaiian Volcano Observatory staff repaired and ...

Over millions of years, the Earth’s upper layers have performed a dance that has created mountains, volcanoes, continents, ridges and ocean trenches. Tectonic plates play a key role in this process.

Newswise — BUFFALO, N.Y. — In 1980, Mount St. Helens erupted in Washington State, killing 57 people and destroying hundreds of homes. The area around the mountain became a wasteland: Roadways were ...

Several volcanoes in the United States (U.S.) could be heading toward a dangerous period of activity, according to geophysicist Stefan Burns, who has warned that changes deep beneath the ground may ...

But in Guatemala, Volcan de Fuego erupts every 15 to 20 minutes, day and night. In this video Geoff and Alexa hike to the top of a Guatemalan Volcano to find out why Central America's volcanoes are so ...

American Samoa is a United States territory which comprises the easternmost islands of a volcanic island chain formed by the Samoan hotspot in the South Pacific Ocean. Its small islands are the tops ...

Far out in the western Pacific, in a chain of islands that form part of United States territory, sits Pagan, one of the most active volcanoes in the entire Mariana Islands arc. The island was ...

On the slopes of an Oregon volcano, engineers are building the hottest geothermal power plant on Earth. The plant will tap into the infernal energy of Newberry Volcano, “one of the largest and most ...

During a two-week trip to American Samoa in August and September, USGS Hawaiian Volcano Observatory staff repaired and ...

Add Yahoo as a preferred source to see more of our stories on Google. Washington Post On the slopes of an Oregon volcano, engineers are building the hottest geothermal power plant on Earth. The plant ...

As American Samoa is within Hawaiian Volcano Observatory’s area of responsibility (the Hawaiian and Samoan archipelagoes ...