A collaborative project.The Global Seismographic Network (GSN) is a 155 stations collaborative project that provides realtime data through the IRIS DMC. The GSN is a cooperative partnership between IRIS and the U.S. Geological Survey (USGS).

IRIS, with funding from the National Science Foundation, provides overall management and oversight for the GSN. IRIS provides a subaward to Project IDA (International Deployment of Accelerometers) at the University of California, San Diego, to operate 41 stations of the network. Another ~100 stations are operated by the USGS. The remaining 12 stations are part of an affiliated network meeting the design goals of the GSN, but operated outside the NSF/USGS funding.

More information at IRIS' GSN page page.

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The EarthScope Array Network Facility supports USArray with the Incorporated Research Institutions for Seismology.
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