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CEUS and Puerto Rico Paleoliquefaction Database



The paleoliquefaction database was developed for the "CEUS Seismic Source Characterization Project for Nuclear Facilities" and later updated during "Paleoliquefaction Studies in Moderate Seismicity Regions with a History of Large Earthquakes," sponsored by the U.S. NRC. The database includes all major regional datasets, including information on the type, size, and age of liquefaction features, for the Central Virginia seismic zone, Charleston seismic zone, Marianna, Arkansas, region, New Madrid seismic zone, New Madrid-Wabash Valley region, Wabash Valley seismic zone, St. Louis region, Newburyport, Massachusetts, and Charlevoix seismic zone and Saguenay region, Quebec.

For information about these regions, see Technical Report, Appendix E (click for report).

Information about the format of the database (click here).

List of references (click here).


Puerto Rico databases were developed in 2022 for National Earthquake Hazard Program Award No. G21AP10006. For more information about the region and list of references, see Technical Report (click here), For information about the format of the database click here.



Downloadable Excel Files

  • New Madrid Seismic Zone
  • Marianna
  • St. Louis
  • New Madrid-Wabash Valley
  • Wabash Valley Seismic Zone
  • Charleston Seismic Zone
  • Massachusetts-New Hampshire
  • SE Quebec
  • Puerto Rico


Downloadable Shapefiles

  • New Madrid Seismic Zone
  • Marianna
  • St. Louis
  • New Madrid-Wabash Valley
  • Wabash Valley Seismic Zone
  • Charleston Seismic Zone
  • Massachusetts-New Hampshire
  • SE Quebec
  • Puerto Rico


CEUS and Puerto Rico Radiocarbon and Optically Stimulated Luminescense (OSL) Databases



The radiocarbon and OSL databases complement the CEUS paleoliquefaction database and provide the actual data on which age estimates of liquefaction features are based in the paleoliquefaction database.

List of references (click here).


The Puerto Rico radiocarbon database complements paleoliquefaction database and provides the actual data on which age estimates of liquefaction features are based.

For database guideline click here.



Radiocarbon Dating



Downloadable Excel Files

  • New Madrid Seismic Zone
  • Marianna
  • St. Louis
  • New Madrid-Wabash Valley
  • Wabash Valley Seismic Zone
  • Charleston Seismic Zone
  • Massachusetts-New Hampshire
  • SE Quebec
  • Puerto Rico


OSL Dating



Downloadable Excel Files

  • New Madrid Seismic Zone
  • Marianna
  • New Madrid-Wabash Valley


M. Tuttle & Associates


P.O. Box 345, Georgetown ME 04548 USA
Telephone: (207) 371-2007