Model CEUS characterizes crustal structure in the central and eastern United States, derived from Rayleigh-wave velocities.  It utilizes a simple three-layer parameterization: sediments, upper crust, and lower crust, with basement and Moho boundaries and layer velocities allowed to vary spatially on a 0.5x0.5 degree grid.  Shear velocities are directly controlled by the data; P velocities are constrained to maintain the Vp/Vs ratio found in model Crust 2.0.  The model file is in a simple ascii format.  Details on the model and it’s construction are in the attached USGS technical report; also see the README file for description of the model. Project sponsored by USGS NEHRP Grant 07HQGR0046.

ASCII Model file

README_ceus.txt

USGS Technical Report