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

A major discovery beneath Yellowstone National Park has revealed a magma cap located nearly 2.4 miles below the surface, which could help prevent a massive volcanic eruption. Using advanced seismic ...

(NEXSTAR) — There have long been questions about when Yellowstone’s volcanic system could see an eruption, especially after a massive hydrothermal explosion was caught on camera last summer.

The PHIVOLCS Volcano Alert Level Scheme is a guide to understanding the state of an active volcano, the current threat it ...

For the last year, Alaska's Mount Spurr has been showing signs of a potential eruption on the horizon. If an eruption happens, it would likely occur at Crater Peak, shown in the background of this ...

How do volcanoes work? What happens beneath their surface? What causes the vibrations—known as tremor—that occur when magma or gases move upward through a volcano's conduits? Professor Dr. Miriam ...

It is thought the cap may be helping to stop the volcanic system from erupting by constantly releasing gases - and pressure - from underneath its surface. A "breathing" cap of magma is stopping one of ...

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