Mason County, WA has a very high earthquake risk, with a total of 30 earthquakes since 1931. The USGS database shows that there is a 89.80% chance of a major earthquake within 50km of Mason County, WA within the next 50 years. The largest earthquake within 30 miles of Mason County, WA was a 5.6 Magnitude in 1999.
View the probability of a major earthquake within the next 50 years in Mason County, WA.
View the number of earthquake incidents in Mason County, WA by year that are more than 2.5 Magnitude.
Total Number of Earthquakes in Mason County, WA within 30 miles. All distances and depths in the table are measured in miles.