Seismic Hazard Map

Magnitude 4.0 YOUNGSTOWN-WARREN AREA, OHIO
Saturday, December 31, 2011 at 20:04:58 UTC

Seismic Hazard Map World Location
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

State boundaries in blue; county boundaries in green.

National Seismic Hazard Mapping Project USGS National Seismic Hazard Mapping Project

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver