Craters of the Moon Volcanic Field
Find U.S. Volcano
Craters of the Moon volcanic field lies at the northwest margin of the Idaho's eastern Snake River Plain.
Quick Facts
Location: Idaho, Snake River Plain
Latitude: 43.42° N
Longitude: 113.5° W
Elevation: 2,005 (m) 6,578 (f)
Volcano type: Cinder cones
Composition: Basalt
Threat Potential: Low/Very Low*
*based on the National Volcano Early Warning System
Summary
The northern part of the Craters of the Moon laps up against the White Knob and Pioneer Mountains. As the largest volcanic field in the region, it covers about 1600 km2 (620 mi2) and contains more than 60 discernible lava flows that were erupted from one fissure system during eight episodes over the past approximately 15 k.y. About 25 cinder cones, up to 250-m (820-ft) high, formed primarily along a 45-km-long (28-mi-long) segment of the Great Rift volcanic rift zone, the principal 2-8 km (1.2-5 mi) wide fissure system that trends northwest to southeast through Craters of the Moon National Monument. The eight eruptive episodes that formed the field occurred between about 15,000 and 2,000 years ago and were separated by quiescent periods averaging about 2,000 years in duration. The Craters of the Moon volcanic field is a polygenetic group of lava flows, meaning that it erupted multiple times. This contrasts with other Snake River Plain lava fields, which were formed during single eruptive episodes of relatively short duration; they are monogenetic lava fields.
News
The Big Buttes of the Eastern Snake River Plain
Craters of the Moon: Idaho's last (and next?) volcanic eruption
Publications
2018 update to the U.S. Geological Survey national volcanic threat assessment
When erupting, all volcanoes pose a degree of risk to people and infrastructure, however, the risks are not equivalent from one volcano to another because of differences in eruptive style and geographic location. Assessing the relative threats posed by U.S. volcanoes identifies which volcanoes warrant the greatest risk-mitigation efforts by the U.S. Geological Survey and its partners. This update