Where can I get earthquake data?

Information and Data Outside of USGS

  • U.S Regional and Cooperating Networks.
  • SCECDC – Southern California Earthquake Data Center.
  • NCEDC – Northern California Earthquake Data Center.
  • IRIS-Incorporated Research Institutions for Seismology.
  • NOAA Earthquake Data and Information.
  • ISC-International Seismological Centre.

What is earthquake data used for?

Seismic monitoring utilizes sensitive seismographs to record the ground motion from seismic waves created by earthquakes or other sources. Seismograms from seismic monitoring stations can be used to determine the location, origin time, and magnitude (as well as other characteristics) of earthquakes.

What is NST in earthquake?

Nst – Number of seismic stations which reported P- and S-arrival times for this earthquake. This number may be larger than Nph if arrival times are rejected because the distance to a seismic station exceeds the maximum allowable distance or because the arrival-time observation is inconsistent with the solution.

What is the name of device used to record earthquake waves?

Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network.

How do earthquake monitors work?

Earthquakes are measured using instruments called seismometers, that detect the vibrations caused by seismic waves as they travel through the crust. Seismic waves can be both natural (from earthquakes) or caused by human activity (explosions). The bigger the vibration, the bigger the zig-zag.

What are three ways in which geologists use seismographic data?

What are three ways in which geologists use seismographic data? Geologists use seismographic data to map faults, monitor changes along faults, and to try to predict earthquakes.

What is azimuthal gap?

Within a sufficiently small distance from any point a seismic network includes no more than two stations, with an azimuthal gap of at least 180°. Conversely, when stations at sufficiently large distances are included then azimuthal gap is less than 180° around any point within a network.

How does USGS collect earthquake data?

Earthquakes are recorded by a seismographic network. Each seismic station in the network measures the movement of the ground at that site. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.