San Tan Valley, AZ has a moderate earthquake risk, with a total of 0 earthquakes since 1931. The USGS database shows that there is a 11.54% chance of a major earthquake within 50km of San Tan Valley, AZ within the next 50 years.
View the probability of a major earthquake within the next 50 years in San Tan Valley, AZ.
See Arizona Earthquake Report or Pinal County, AZ Earthquake Report