Earthquake Hazards Program
The USGS Earthquake Hazards Program is part of the National Earthquake Hazards Reduction Program (NEHRP), established by Congress in 1977. We monitor and report earthquakes, assess earthquake impacts and hazards, and research the causes and effects of earthquakes.
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Significant Earthquakes Past 30 Days
Significant Earthquake ArchiveFeatured Items
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M6 South Napa, California Earthquake – August 24, 2014: What We Know After One Year
In the wee hours of Sunday morning at 3:20am, the residents and wineries of Napa Valley were shaken by a magnitude 6.0 earthquake, the largest in the San Francisco Bay Area in over 25 years, and the first since the M7.9 1906 earthquake to rupture on the surface. This article describes what USGS (and USGS-funded) scientists have learned from the data one year after the earthquake.
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Earthquake Hazard Posed by the Hosgri Fault
USGS research geologist Sam Johnson of the Pacific Coastal and Marine Science Center was quoted in an Associated Press story and a subsequent radio interview about the Hosgri fault, which is being evaluated for the shaking hazard it might pose to the Diablo Canyon nuclear power plant, about 200 miles up the California coast from Los Angeles.
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A Century of Induced Earthquakes in Oklahoma?
A new study by the U.S Geological Survey released today presents evidence that, in addition to the recent induced earthquakes, most of the larger earthquakes in Oklahoma in the past century may likely have also been induced by industrial activities.
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