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Ubehebe (pronounced you-bee-HEE-bee) Craters, located about 225 km (140 mi) northwest of Las Vegas, NV, and 88 km (55 mi) southeast of Bishop, CA, in Death Valley National Park, consists of thirteen overlapping volcanic craters. 


Summary

The largest crater is about 800 m (0.5 mi) wide and 250 m (800 ft) deep. The craters formed during a series of explosions set off as molten rock (basaltic magma) rising toward the Earth's surface flashed groundwater to steam (phreatic eruption). The explosive magma-water interaction blasted pulverized rock high into the air so that the ejected deposits are comprised of both basaltic lava (about a third) and fragments of sandstone and gravel from the preexisting landscape (about two thirds). Debris from the explosions blankets an area of about 40 km2 (15 mi2). Research by CalVO scientists suggests the set of crater-forming blasts may have taken place in response to a single batch of rising magma. The eruptive episode probably lasted a few days or weeks and took place about 2100 years ago.

The California Volcano Observatory has only one seismometer in the vicinity of Ubehebe Craters, which, along with the region-wide network of USGS seismometers, will alert us to any future volcanic unrest. Presently, Ubehebe Craters is ranked as Moderate Threat volcano in the USGS volcanic threat assessment (USGS Open-File Report 2005-1164, 2005). Threat rankings of all US volcanoes are periodically reviewed and may be revised as new research is published.

The word Ubehebe is Native American in origin and means "big basket in the rock."

News

Date published: April 5, 2017

Explore California's volcanic legacy and future with new field trip guides

California is well-known for its frequent earthquakes, but less so for its volcanic history – despite the fact that the most recent eruption in the state occurred just 100 years ago.

Date published: March 15, 2017

New scientific publications about our California Volcanoes by USGS authors

Two new journal articles about California Volcanoes in the eastern part of the state, the Long Valley Caldera and Ubehebe Craters, are headed to press.

Date published: March 25, 2016

The Short Story of Ubehebe Crater in Death Valley National Park

New research by scientists at CalVO indicates that Ubehebe Craters formed about 2100 years ago during a single eruptive event. Ubehebe Craters are a lone cluster of volcanic craters in the northern half of...

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