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.

Add Yahoo as a preferred source to see more of our stories on Google. When you think of the United States, images of sprawling cities and vast landscapes might come to mind, but not the hidden and ...

Alaska’s Mount Spurr is about to erupt. Be ready. That’s the current message from the Alaska Volcano Observatory. Continued unrest at the volcano roughly 75 miles west of Anchorage within the ...

When a volcano is about to erupt, most people are fearful. But with the growing number of in-person and online viewers of one of the world’s most active volcanoes, several people are, instead, excited ...

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 ...

At the risk of this blog becoming all volcanoes, all the time, I bring you... more volcanoes! Two of my favorite geobloggers wrote mustn't-miss posts on some of our Cascades volcanoes. They showcase ...

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 ...