This software package is used to create and query the seismic velocity model(s) covering the greater San Francisco Bay area and the surrounding region developed by the United States Geological Survey. See 3-D Geologic and Seismic Velocity Models of the San Francisco Bay Region for information about the models and how to download the data files.
Updates to the data in the velocity model (the etree database file) are generally independent of updates to the querying software. This means the version numbers are also independent of one another. Unless the velocity model undergoes fundamental changes in the way the data is stored, you can safely use updated versions of the etree database without recompiling the query software, and vice versa.
See INSTALL.md.
See CHANGES.md for a complete list of changes for each release.
- Brad Aagard, Geologic Hazards Science Center, USGS, USA