Northern California data:

• Northern California Seismic Net (NCSN)
• Berkeley Digital Seismic Net (BDSN)

  The participating institutions are:
  

  • U.S. Geological Survey, Menlo Park
  • Univ. of California, Berkeley, Seismological Laboratory
  • Data archive at Northern California Earthquake Data Center (NCEDC)

Southern California data:

• Southern California Seismic Network (SCSN): a cooperative project.

  The participating institutions are:
  

  • U.S. Geological Survey, Pasadena
  • California Institute of Technology, Seismological Laboratory
  • University of California, San Diego
  • Data archive at Southern California Earthquake Center, Data Center

Nevada data:

• Univ. of Nevada, Reno, Seismological Laboratory

Other regions and offshore:

• National Earthquake Information Center (NEIC)
• West Coast & Alaska Tsunami Warning Center

All members of the ...

• Advanced National Seismic System (ANSS)