Gann Valley, SD has a low earthquake risk, with a total of 3 earthquakes since 1931. The USGS database shows that there is a 1.69% chance of a major earthquake within 50km of Gann Valley, SD within the next 50 years. The largest earthquake within 30 miles of Gann Valley, SD was a 4.4 Magnitude in 1983.
View the probability of a major earthquake within the next 50 years in Gann Valley, SD.
View the number of earthquake incidents in Gann Valley, SD by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Gann Valley, SD within 30 miles. All distances and depths in the table are measured in miles.