Regional Hazard Maps and Data Download

The regional maps available here are derived in much the same way as the urban seismic hazard maps, with both including the effects of shallow geologic structure on estimated ground shaking.  The regional maps show the varying levels of ground shaking expected for specific hypothetical or 'scenario' earthquakes, both in terms of ground accelerations and their effects measured in 'intensity' units. The calculations underlying these regional maps employ the same methodology and input information as in the national and urban seismic hazard maps, except for the shallow geologic structure and the specific parameters describing each earthquake. The sources of the geologic information are provided below and each map lists the earthquake parameters specific to that map.

Graphic and HAZUS formats

for New Madrid Seismic Zone scenarios

MMI Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the northeast linear zone of modern seismicity, geology included: gif

PGA Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the northeast linear zone of modern seismicity, geology included: gif

1.0 sec Spectral Acceleration Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the northeast linear zone of modern seismicity, geology included: gif

0.3 sec Spectral Acceleration Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the northeast linear zone of modern seismicity, geology included: gif

HAZUS input for this scenario with MMI, PGA, PGV, 1.0 sec and 0.3 sec Spectral Acceleration.
Hazus data can also be used in ArcGIS.

MMI Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southwest linear zone of modern seismicity, geology included: gif

PGA Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southwest linear zone of modern seismicity, geology included: gif

1.0 sec Spectral Acceleration Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southwest linear zone of modern seismicity, geology included: gif

0.3 sec Spectral Acceleration Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southwest linear zone of modern seismicity, geology included: gif

HAZUS input for this scenario with MMI, PGA, PGV, 1.0 sec and 0.3 sec Spectral Acceleration.
Hazus data can also be used in ArcGIS.

MMI Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the central linear zone of modern seismicity, geology included: gif

PGA Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the central linear zone of modern seismicity, geology included: gif

1.0 sec Spectral Acceleration Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the central linear zone of modern seismicity, geology included: gif

0.3 sec Spectral Acceleration Hazard for a M7.7 earthquake located north of Memphis, on a fault coincident with the central linear zone of modern seismicity, geology included: gif

HAZUS input for this scenario with MMI, PGA, PGV, 1.0 sec and 0.3 sec Spectral Acceleration.
Hazus data can also be used in ArcGIS.

for Wabash Valley Seismic Zone scenario

MMI Hazard for a M7.1 earthquake located in an area coincident with liquefaction features near Vincennes IN, geology included: gif

PGA Hazard for a M7.1 earthquake located in an area coincident with liquefaction features near Vincennes IN, geology included: gif

1.0 sec Spectral Acceleration Hazard for a M7.1 earthquake located in an area coincident with liquefaction features near Vincennes IN, geology included: gif

0.3 sec Spectral Acceleration Hazard for a M7.1 earthquake located in an area coincident with liquefaction features near Vincennes IN, geology included: gif

HAZUS input for this scenario with MMI, PGA, PGV, 1.0 sec and 0.3 sec Spectral Acceleration.
Hazus data can also be used in ArcGIS.

for Shoal Creek/Southern Illinois Basin scenario

MMI Hazard for a M6.0 earthquake located in an area coincident with liquefaction features east of St. Louis MO, geology included: gif

PGA Hazard for a M6.0 earthquake located in an area coincident with liquefaction features east of St. Louis MO, geology included: gif

1.0 sec Spectral Acceleration Hazard for a M6.0 earthquake located in an area coincident with liquefaction features east of St. Louis MO, geology included: gif

0.3 sec Spectral Acceleration Hazard for a M6.0 eearthquake located in an area coincident with liquefaction features east of St. Louis MO, geology included: gif

HAZUS input for this scenario with MMI, PGA, PGV, 1.0 sec and 0.3 sec Spectral Acceleration.
Hazus data can also be used in ArcGIS.