Seismic Data Sources

Permanent Networks

Permanent networks provide passive data only.

Global Seismographic Network

The IRIS Global Seismographic Network (GSN) is one of the four major components of IRIS Consortium. The goal of the GSN is to deploy 128 permanent seismic recording stations uniformly over the earth’s surface.

Learn more about the GSN.


The International Federation of Digital Seismograph Networks (FDSN) is a global organization. Its members are responsible for the installation and maintenance of broad-band seismographs either within their geographic borders or globally.

List of Permanent FDSN Network Codes
Request a permanent FDSN Network Code
Data shipment statistics for FDSN and other data

Regional Networks

Several regional networks contribute data to the IRIS archive or have open access to their data sets.

Listing of regional network data

Virtual Networks at the IRIS DMC

A virtual network is a group of stations and/or seismic networks.

List of virtual networks

Temporary Networks and Experimental Data

Temporary networks may include both passive and active data.


The Program for the Array Seismic Studies of the Continental Lithosphere (PASSCAL) is another one of the four major componenets of IRIS. PASSCAL operates a pool of over 400 portable seismic instruments to record active source reflection data, active source refraction data or natural source recordings of earthquakes.

Learn more about PASSCAL.

Other Sources

IRIS also has an archive of other temporary deployments from several different sources including:

  • United States Geological Survey (USGS)
  • Seismic Equipment InfraStructure in the UK (SEIS-UK)
  • U.S. National Ocean Bottom Seismograph Instrument Center (OBSIC)

List of Temporary FDSN Network Codes
Request a temporary FDSN Network Code
Temporary deployment mobilization form

Event Catalog Data

IRIS archives event data produced by various contributors.

National Earthquake Information Center, World Data Center for Seismology, Denver, Colorado

The NEIC is responsible for determining, as rapidly and as accurately as possible, the location and size of all destructive earthquakes that occur worldwide; and collecting and providing an extensive seismic database.

International Seismological Centre, United Kingdom

The ISC is a non-governmental organization charged with the final collection, analysis and publication of standard earthquake information from all over the world.

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