Portsmouth, RI has a low earthquake risk, with a total of 26 earthquakes since 1931. The USGS database shows that there is a 1.43% chance of a major earthquake within 50km of Portsmouth, RI within the next 50 years. The largest earthquake within 30 miles of Portsmouth, RI was a 4.0 Magnitude in 2020.
View the probability of a major earthquake within the next 50 years in Portsmouth, RI.
View the number of earthquake incidents in Portsmouth, RI by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Portsmouth, RI within 30 miles. All distances and depths in the table are measured in miles.