Take a tour through volcanic history on the edge of the Sierra Nevada near Mammoth Lakes, California. Between the tall ...

A volcano in the eastern side of Indonesia on Tuesday spewed a massive ash tower into the sky, prompting authorities to raise an alert, officials said. Indonesian authorities have raised the volcano's ...

Add Yahoo as a preferred source to see more of our stories on Google. Madeira is home to rugged volcanic mountains which rise above the clouds, creating natural swimming pools. Photograph by Celeste ...

Mount Shasta presents a unique challenge that most other active volcanoes don't for USGS scientists. The only place to sample ...

A 2,500 km long line of volcanoes, with 80 volcanic mountains and 41 historically active (since 1760 AD) volcanoes produce an arc stretching along the southern edge of the Bering Sea and onto the ...

Yellowstone's geysers and hot springs draw in over 4 million visitors each year, according to the National Park Service. They flock there despite (or maybe because of) the bizarre Yellowstone National ...

Mount Etna is the largest active volcano in Europe. The oldest volcanic deposits are 230,000 years old and the constant activity of the volcano has been noted for the last 3,500 years, especially the ...

A renewed push to bury the nation’s most dangerous nuclear waste northwest of Las Vegas could hinge on competing scientific theories about the hazards of nearby volcanoes. If federal regulators ...

An active volcano in northeastern Tanzania known to the Maasai as the “Mountain of God” has been quietly rumbling—and it is showing signs that an eruption is imminent. Known as Ol Doinyo Lengai, the 7 ...

The Fagradals Mountain volcano in southwest Iceland had been dormant for 6,000 years. But on Friday night, following weeks of earthquakes in the area, the volcano came to life. The eruption is the ...