United States Geological Survey
The USGS Earthquake Hazards Program monitors earthquake activity worldwide. Its National Earthquake Information Center (NEIC) in Golden, Colorado detects the location and magnitude of global earthquakes. The USGS also runs or supports several regional monitoring networks in the U.S. under the umbrella of the Advanced National Seismic System  (ANSS). The USGS informs authorities, emergency responders, the media, and the public, both domestic and worldwide, about significant earthquakes. It also maintains long-term archives of earthquake data for scientific and engineering research. It also conducts and supports research on long-term seismic hazards.