Albuquerque Seismology Lab (USGS)
Idaho National Engineering Lab (INEEL)
Seismic Monitoring Program
MCEER
Multidisciplinary Center For Earthquake Engineering Research.
Montana Bureau of Mines Network - Earthquake information
New Mexico Tech - Geophysics Program
Saint Louis University
Saint Louis University Earthquake Center (Central US data).
SASO
University of Arizona (SASO)
University of Colorado - Dept. of Physics (Geophysics Group)
University of Nevada Reno
University of Utah (UUSS)
US Bureau of Reclamation (WY, CO)
Wyoming State Geological Survey - Geologic Hazards Section