Exciting news! We're transitioning to the Statewide California Earthquake Center. Our new website is under construction, but we'll continue using this website for SCEC business in the meantime. We're also archiving the Southern Center site to preserve its rich history. A new and improved platform is coming soon!

Predictions of Shear Wave Velocities in Southern California Using Surface Geology

Steven K. Park

Published June 1998, SCEC Contribution #421

A new model of the average shear-wave velocity in the uppermost 30 m has been generated by extrapolation of discrete velocity profiles using surface geology at several scales. Statistical methods have been applied to create a map that is no more complicated than is supported by the velocity data; several geologic units with similar responses are grouped together. The resulting map is simpler than previous ones and yet fits the observed velocity profiles better than earlier, more complicated maps. Analysis within a geographic information system will permit updates and modification of the map as new velocity data are added.

Citation
Park, S. K. (1998). Predictions of Shear Wave Velocities in Southern California Using Surface Geology. Bulletin of the Seismological Society of America, 88(3), 677-685.