Popocatépetl emerged in the crater of other volcanoes in its current form more than 20,000 years ago and has been active ...

Mount St. Helens -- What is a volcano? -- Layers of earth -- Kinds of volcanoes -- Eruptions -- Other dangers -- How volcanoes help -- From lava to land -- Dormant volcanoes -- Geothermal energy -- ...

Scientists have uncovered a long-missing piece of the volcanic puzzle: rising magma doesn’t just form explosive gas bubbles when pressure drops—it can do so simply by being sheared and “kneaded” ...

Researchers from the National Autonomous University of Mexico spent five years hauling instruments up the 5,426-meter volcano ...

Most of the world’s volcanoes that pose a risk to humans already have detailed maps of their interiors, but not Popocatépetl ...

When you think of the United States, images of sprawling cities and vast landscapes might come to mind, but not the hidden and ever-present geological threat: volcanoes. While you might associate ...

Uturuncu, a dormant volcano in Bolivia, appeared to be getting ready to erupt following earthquakes and "sombrero" shaped deformation — scientists have now worked out what's going on beneath the ...

Volcanoes in Alaska, Washington state, Oregon and Hawaii have been rumbling and even spewing lava, enough to spark a swarm of news stories. But despite the jolts and temblors, geologists say there's ...

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

There’s a “hidden gem” in Northern California for travelers who prefer to stay off the beaten path, Lassen Volcanic National Park. “We have volcanic features and hydrothermal features that you might ...