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News about Long Valley Caldera.

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How hot is Long Valley Caldera?

How hot is Long Valley Caldera?

Measuring the temperature of lava erupting on the Earth’s surface is possible with the right equipment. But how do you figure out the temperature of...

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When it comes to calderas, how big is big?

When it comes to calderas, how big is big?

Talking about calderas means venturing into superlatives - huge volumes of magma and topographic changes on a regional, even state-sized scale. But...

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Getting sphere-ious about spherulites

Getting sphere-ious about spherulites

If you ever have the chance to visit the silica-rich Hot Creek rhyolite lava flow in the Long Valley Caldera, you might get the sense that you're...

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USGS volcano scientists visit Long Valley

USGS volcano scientists visit Long Valley

If you were visiting Long Valley this past week, you might have seen a cavalcade of SUVs periodically disgorging people wielding rock hammers, hand...

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The Mystery of the Noon Booms Part 2

The Mystery of the Noon Booms Part 2

In last week's post (https://www.usgs.gov/observatories/calvo/news/mystery-noon-booms-part-1), we challenged you to give us your best hypotheses as to...

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Bubble trouble? Tracking changing hydrothermal features in Long Valley's Hot Creek

Bubble trouble? Tracking changing hydrothermal features in Long Valley's Hot Creek

If you spend time in Long Valley, you may have noticed some changes in the Hot Creek springs and pools following this winter's dramatic snows...

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What makes Long Valley's resurgent dome reach for the skies?

What makes Long Valley's resurgent dome reach for the skies?

While the huge caldera-forming eruption of Long Valley was 767,000 years ago, between about 670,000 and 570,000 years ago uplift of the caldera's...

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California's calderas

California's calderas

Did you know that Long Valley is not the only caldera in California? In fact, there are at least 5.

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One benefit of California’s volcanoes? Geothermal energy

One benefit of California’s volcanoes? Geothermal energy

Nearly all of California’s geothermal electric power generation comes from areas where eruptions occurred in the past tens of thousands of years

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Unpacking CalVO's new seismic monitoring boxes

Unpacking CalVO's new seismic monitoring boxes

If you've noticed any changes to the earthquake counts released in CalVO's weekly updates, don't worry - some behind-the-scenes improvements to our...

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M4.4 "Sierra Block" earthquake west of Mammoth Lakes

M4.4 "Sierra Block" earthquake west of Mammoth Lakes

At 10:36:54 PST (18:36:54 UTC on) 1 February, a M4.4 earthquake occurred under McGee Mountain near Toms Place, CA, at a depth of 10 km.

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Which U.S. volcanoes pose a threat?

Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

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