SALT LAKE CITY, Utah (ABC4 Utah) Several state agencies have teamed up to produce a resource to educate Utahns about the hazard from earthquakes and faults.
The Utah Geological Survey, University of Utah Seismograph Stations and Utah Division of Emergency Management recently published the Utah Earthquakes (1850-2016) and Quaternary Fault Map. The new map shows earthquakes within an surrounding Utah from 1850 to 2016, and faults considered to be sources of large earthquakes.
The faults shown on the map are considered to geologically active, have been sources of large earthquakes in the past 2.6 million years and are most likely sources of large earthquakes in the future.
Most of the small to moderate-sized earthquakes on the map are “background” earthquakes not readily associated with known faults and too small to have triggered surface faulting (under about magnitude 6.5).
Experts say there is a 57 percent probability that a magnitude 6.0 or greater earthquake will strike the Wasatch Front in the next 50 years.
To address this threat, the Utah Earthquake Program developed a map so the public could more fully understand the hazard from earthquakes and faults, as well as the resulting risk to property, infrastructure, and life safety in Utah.
By viewing the map, you will be able to determine past earthquake locations and relative magnitudes, along with the locations of active faults and the timing of their most recent movement.
You can buy a printed copy of the map at the Utah Department of Natural Resources Map & Bookstore. It is also available as a PDF download at https://ugspub.nr.utah.gov/publications/maps/m-277.pdf.
More information on Utah’s earthquake risk can be found at https://geology.utah.gov/hazards/earthquakes-faults/ from the Utah Seismic Safety Commission at https://ussc.utah.gov, and at the agency websites:
Utah Geological Survey: https://geology.utah.gov
University of Utah Seismograph Stations: http://quake.utah.edu
Utah Division of Emergency Management: https://dem.utah.gov/
The Utah Geological Survey is one of seven divisions within the Utah Department of Natural Resources.