In the last 6000 years,a magnitude 6.5 or stronger earthquake has occurred about once every 350 years on one of the Wasatch system faults,but no large earthquakes have been reported along the Wasatch Front faults since the arrival of Brigham Young in 1847.

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The Wasatch Front faults, part of the Wasatch fault system, have a history of producing significant earthquakes over geological time scales. However, since the arrival of Brigham Young and the early settlers in the Utah area in 1847, there have been no recorded large earthquakes (magnitude 6.5 or stronger) along these faults, despite the long-term averages suggesting such events occur roughly every 350 years. This lack of recent large earthquakes does not negate the historical geological evidence indicating their occurrence over the past 6000 years.

In the Last 6000 Years,a Magnitude 6