Geology

Iowa Earthquake Information - USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards. Includes historic and recent earthquakes, and seismic maps.

Iowa Geological Survey - Plans and implements programs that result in the acquisition of information on the mineral and water resources of the State, with emphasis on water supply developments and monitoring the effects of environmental impacts on water quality. Includes list of maps for sale.