Ofallon Township, IL has a low earthquake risk, with a total of 13 earthquakes since 1931. The USGS database shows that there is a 4.28% chance of a major earthquake within 50km of Ofallon Township, IL within the next 50 years. The largest earthquake within 30 miles of Ofallon Township, IL was a 5.6 Magnitude in 1974.
View the probability of a major earthquake within the next 50 years in Ofallon Township, IL.
View the number of earthquake incidents in Ofallon Township, IL by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Ofallon Township, IL within 30 miles. All distances and depths in the table are measured in miles.