TauP

The TauP Toolkit is a seismic travel time calculator. In addition to travel times, it can calculate derivative information such as ray paths through the earth, pierce and turning points. It handles many types of velocity models and can calculate times for virtually any seismic phase with a phase parser. It is written in Java so it should run on any Java enabled platform.
You may download the latest version, 1.1.5, as a tar.gz or zip under the terms of the Gnu Public License. It was created on August 2, 2005. The documentation for TauP is available as a PDF document. You can download the zip file or the tar.gz version containing a draft and the source images of our paper submitted to the Seismological Research Letters. If you have any comments or would like to be notified of new versions, please join the TauP email list at http://www.seis.sc.edu/mailman/listinfo/taup.