That movement has now left one pool of molten material on the west of the caldera disconnected from any heat sources, which ...

Large explosive eruptions occur in Yellowstone around once every 700,000 years, according to the U.S. Geological Survey.

The caldera is the enormous volcanic crater left from the last time Yellowstone experienced a giant eruption ... technique that produces more precise maps of the large reservoirs of magma under ...

A volcanic eruption is unlikely to occur at Yellowstone National Park because ... volcanoes uses seismic data — seismic waves that can map geologic structures — to measure the magma under ...

Map showing extent of ashfall from eruptions. The Yellowstone Caldera formed over 600,000 years ago from the Lava Creek Tuff eruption, which was measured on the Volcanic Explosivity Index as an 8 ...

(The caldera is the enormous volcanic crater left from the last time Yellowstone experienced a giant eruption, 640,000 years ago ... An imaging technique that produces more precise maps of the large ...