Contrary to popular belief, it’s not the big-name volcanoes like Yellowstone and Mount Etna in Sicily that pose the greatest ...

In Yellowstone National Park, earthquakes are an everyday occurrence whether humans feel them or not. In fact, data shows ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Shaul Hurwitz, research hydrologist ...

Two pools at Yellowstone National Park are overflowing and the area remains hazardous for visitors two days after a hydrothermal explosion in the park's Biscuit Basin. An underground stream of water ...

Across America, a handful of extraordinary national parks give travelers the rare chance to see endangered animals thriving in protected wilderness.

Visitors ran for safety at Yellowstone National Park after a hydrothermal explosion sent rock and steam spewing into the air north of the Old Faithful geyser Tuesday, park officials said. There were ...