Portal Township, ND has a very low earthquake risk, with a total of 0 earthquakes since 1931. The USGS database shows that there is a 0.41% chance of a major earthquake within 50km of Portal Township, ND within the next 50 years.
View the probability of a major earthquake within the next 50 years in Portal Township, ND.
See North-Dakota Earthquake Report or Burke County, ND Earthquake Report