Earthquake Hazards Program | U.S. Geological Survey
Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Frequently Asked Questions Significant Earthquakes Archive What makes an earthquake "significant"? Significant Earthquakes Archive What makes an earthquake "significant"? The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. We undertake these activities as part of the larger National Earthquake Hazards Reduction Program (NEHRP), a four-agency partnership established by Congress. Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Find an earthquake or a list of earthquakes by time win