Cvmbycols

Overview

Cvmbycols is a set of codes for producing compacted Etrees for geographic regions with material properties drawn from a community velocity model.

Defining properties of an Etree

The following properties are defined:

• Bounding box of geographic region in lon,lat coordinates
• Extents of Etree volume in 3D, in km
• Number of columns in x,y axis to partition 3D space. The resulting columns must be square along the x-y axis.
• Frequency limit to support in Hz
• Number of points per wavelength to support
• Minimum Vs to support
• Maximum octant size to allow
• Name of the output etree file
• CVM to use for material properties (from UCVM)

Source Code

SVN: https://source.usc.edu/svn/cvmbycols

Supported CVMs

The cvmbycols utility is built upon UCVM. As a result, it can extract etrees from the following CMV sources:

• CVM-H
• CVM-S
• USGS Cencal (which itself is an etree)
• 1D