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Age-model codes and paleoearthquake ages for the Frazier Mountain, Pallett Creek, and Wrightwood paleoseismic sites along the Southern San Andreas Fault, California

December 4, 2025

These datasets provide age-model codes and resultant paleoearthquake age distributions for three paleoseismic sites along the southern San Andreas Fault. The code format is compatible with the age-model program OxCal (Bronk Ramsey 2009) which calibrates radiocarbon dates to calendar years and uses stratigraphic relationships among radiocarbon samples and sedimentary units to compute paleoearthquake ages. Earthquake age distributions are provided as CSV files. The source data were developed as part of primary investigations into the timing of past earthquakes at each site. This data release provides necessary stratigraphic context to reconstruct the earthquake ages in OxCal. Users are encouraged to access the original reports for context on the radiocarbon samples, stratigraphy, earthquake evidence and quality, and depositional environment at each site.

Publication Year 2025
Title Age-model codes and paleoearthquake ages for the Frazier Mountain, Pallett Creek, and Wrightwood paleoseismic sites along the Southern San Andreas Fault, California
DOI 10.5066/P13Y3GPY
Authors Katherine M Scharer, Ray Weldon, Glenn P Biasi, Devin F. McPhillips
Product Type Data Release
Record Source USGS Asset Identifier Service (AIS)
USGS Organization Earthquake Science Center
Rights This work is marked with CC0 1.0 Universal
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