Union City, CA has a very high earthquake risk, with a total of 6,701 earthquakes since 1931. The USGS database shows that there is a 99.64% chance of a major earthquake within 50km of Union City, CA within the next 50 years. The largest earthquake within 30 miles of Union City, CA was a 6.1 Magnitude in 1984.
View the probability of a major earthquake within the next 50 years in Union City, CA.
View the number of earthquake incidents in Union City, CA by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Union City, CA within 30 miles. All distances and depths in the table are measured in miles.