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 DaysSignificant Earthquake Archive
In the days and months following the 2015 earthquake, scientists spread out over the area and collected as much data as they could, while also being sensitive to the the humanitarian crisis and assisting with immediate hazard assessments.
This is a summary of what happened, the data that scientists have been able to gather, and how the data has helped them to figure out the underlying science of this event.View Research
50-Year-Old Mystery Solved: Seafloor Mapping Reveals Cause of 1964 Tsunami that Destroyed Alaskan Village
Minutes after the 1964 magnitude-9.2 Great Alaska Earthquake began shaking, a series of tsunami waves swept through the village of Chenega in Prince William Sound, destroying all but two of the buildings and killing 23 of the 75 inhabitants. Fifty years later, scientists from the U.S. Geological Survey revealed the likely cause of the tsunami, a large set of underwater landslides.View Research
Globally there were 14,588 earthquakes of magnitude 4.0 or greater in 2015. This worldwide number is on par with prior year averages of about 40 earthquakes per day of magnitude 4.0, or about 14,500 annually.View News