Intermountain Region Earthquake Listings & Maps

Intermountain Seismic Belt (ISB) includes Utah and parts of Montana, Idaho, Wyoming, Nevada, Colorado, Arizona, and New Mexico.

• Overview map from Smith and Arabasz, 1991, in Slemmons, D.B., Engdahl, E.R., Zoback, M.D., and Blackwell, D.D., eds., Neotectonics of North America: Boulder, Colorado, Geological Society of America, Decade Map Volume 1.


• ISB Earthquake Listing (1900 - 1985) (292K) from Slemmons, D.B., Engdahl, E.R., Zoback, M.D., and Blackwell, D.D., eds., 1991, Neotectonics of North America: Boulder, Colorado, Geological Society of America, Decade Map Volume 1.


• Earthquake Information from Other Seismograph Networks in the Intermountain Region:
  • ANSS Earthquake Catalog, The Advanced National Seismic System composite earthquake catalog (maintained at the University of California-Berkeley).
  • Montana Bureau of Mines and Geology at Montana Tech of the University of Montana.
  • Nevada Seismological Laboratory at the University of Nevada, Reno.
  • Arizona Earthquake Information Center at Northern Arizona University, Department of Geology.
  • Boise State University, Idaho in cooperation with the Idaho National Engineering Laboratory.
  • USGS National Earthquake Information Center (NEIC) information by state.