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 ...

Two long-dormant “supervolcanoes” on two separate continents appear to be stirring to life. Well, maybe. In recent months, more than a thousand minor earthquakes have rattled the area around the Campi ...

Two long-dormant “supervolcanoes” on two separate continents appear to be stirring to life. Well, maybe. In recent months, more than a thousand minor earthquakes have rattled the area around the Campi ...

What's going on beneath the surface of the Long Valley Caldera, the site of a massive supervolcano eruption 760,000 years ago? A new study uses seismic waves to image the underground environment in ...

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The U.S. Geological Survey deemed the Long Valley Caldera — adjacent to Mammoth Mountain — to be a "very high threat" in 2018. But a new study in the Science Advances journal suggests a catastrophic ...

Who has ‘volcanic eruption’ on their California threats bingo card? Californians are familiar with earthquakes. We’re used to facing off against wildfires. We’ve weathered storms that brought flooding ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

One of California's riskiest volcanoes has for decades been undergoing geological changes and seismic activity, which are sometimes a precursor to an eruption, but — thankfully — no supervolcanic ...

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, ...