Mattawa, WA has a moderate earthquake risk, with a total of 0 earthquakes since 1931. The USGS database shows that there is a 14.67% chance of a major earthquake within 50km of Mattawa, WA within the next 50 years.
View the probability of a major earthquake within the next 50 years in Mattawa, WA.
See Washington Earthquake Report or Grant County, WA Earthquake Report