Harrisburg, IL has a moderate earthquake risk, with a total of 16 earthquakes since 1931. The USGS database shows that there is a 9.66% chance of a major earthquake within 50km of Harrisburg, IL within the next 50 years. The largest earthquake within 30 miles of Harrisburg, IL was a 4.1 Magnitude in 1984.
View the probability of a major earthquake within the next 50 years in Harrisburg, IL.
View the number of earthquake incidents in Harrisburg, IL by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Harrisburg, IL within 30 miles. All distances and depths in the table are measured in miles.