how often does utah have earthquakes

Utah experiences about 700 earthquakes each year, including many small ones that are not felt. On average, Utah has about 6 earthquakes of magnitude 4.0 or greater annually, 1 earthquake of magnitude 5.0 or greater yearly, and more damaging earthquakes of magnitude 5.5 to 6.5 occur every 10 to 50 years. Significant large earthquakes (magnitude 7.0 to 7.5) happen roughly every 150 years on major fault lines like the Wasatch Fault. The Wasatch Front region alone sees about 500 earthquakes per year, making up about 60% of Utah’s magnitude 3.0 or greater quakes. There is also a notable probability (e.g., 57%) that the Wasatch Front will experience at least one magnitude 6.0 or greater earthquake in the next 50 years.