Onawa, IA has a very low earthquake risk, with a total of 0 earthquakes since 1931. The USGS database shows that there is a 0.24% chance of a major earthquake within 50km of Onawa, IA within the next 50 years.
View the probability of a major earthquake within the next 50 years in Onawa, IA.
See Iowa Earthquake Report or Monona County, IA Earthquake Report