Grantham, NH has a low earthquake risk, with a total of 25 earthquakes since 1931. The USGS database shows that there is a 2.39% chance of a major earthquake within 50km of Grantham, NH within the next 50 years. The largest earthquake within 30 miles of Grantham, NH was a 4.5 Magnitude in 1982.
View the probability of a major earthquake within the next 50 years in Grantham, NH.
View the number of earthquake incidents in Grantham, NH by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Grantham, NH within 30 miles. All distances and depths in the table are measured in miles.