Did you know the Ring of Fire, a horseshoe-shaped zone around the Pacific Ocean, has about 750 to 915 active or dormant ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment in 1879. Congress created the USGS to “classify the public lands and examine ...

Volcano Watch is a weekly article and activity update written by US Geological Survey Hawaiian Volcano Observatory scientists and affiliates.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. An unknown volcano ...

Volcanic eruptions frequently interfere with human affairs; impacts range from minor nuisances to major disasters. Some 50 to 65 different volcanoes typically are active in any given year, and among ...

One of the most deadly and dangerous volcano hazards isn’t lava. Mudflows called lahars can come without clear warning.

Of the five USGS volcano observatories, the Cascades Volcano Observatory is now the largest, with close to 80 permanent staff members focused on the Cascades and beyond. Many of them tasked with ...

This model that will be displayed in the Mountwood Park Visitors Center details life in Volcano in the 1870s. (Photos provided by Jimmie Bee) VOLCANO — The historic West Virginia boomtown of Volcano ...