Every year that the ground beneath Long Valley Caldera stays quiet, the odds of an eruption somewhere along its volcanic chain sit at roughly one in a few hundred, a figure the U.S. Geological Survey ...

A 10-mile-wide volcanic basin in the eastern Sierra Nevada has been slowly swelling for decades as fresh magma rises beneath ...

Add Yahoo as a preferred source to see more of our stories on Google. A scalding-hot pool of mineral water is shown at the Long Valley Caldera in 2019 near Mammoth Lakes. (George Rose / Getty Images) ...

New high-resolution images of the Long Valley Caldera indicate that the subsurface environment is cooling off, releasing gas and fluids that contribute to seismic activity. Since the 1980s, ...

Authors Evelyn A. Roeloffs, Michelle Sneed, Devin L. Galloway, Michael L. Sorey, Christopher D. Farrar, James F. Howle, J. Hughes ...

A new study looks at rock from the titanic eruption that formed Long Valley Caldera in California 765,000 years ago. Calderas occur when a volcano collapses after an eruption. Long Valley has been ...

A scalding-hot pool of mineral water is shown at the Long Valley Caldera in 2019 near Mammoth Lakes. (George Rose / Getty Images) One of California's riskiest volcanoes has for decades been undergoing ...

This article predates Brown Brothers Media’s ownership of Science Blog and has not been reviewed under our current editorial process. It is preserved as part of the publication’s archive. A diagram ...

Since the 1980s, researchers have observed significant periods of unrest in a region of California's Eastern Sierra Nevada mountains characterized by swarms of earthquakes as well as the ground ...