West Gregory, SD has a low earthquake risk, with a total of 1 earthquakes since 1931. The USGS database shows that there is a 1.10% chance of a major earthquake within 50km of West Gregory, SD within the next 50 years. The largest earthquake within 30 miles of West Gregory, SD was a 2.7 Magnitude in 2010.
View the probability of a major earthquake within the next 50 years in West Gregory, SD.
View the number of earthquake incidents in West Gregory, SD by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in West Gregory, SD within 30 miles. All distances and depths in the table are measured in miles.