Travel times of teleseismic body waves through earth model iasp91 The FORTRAN programs used for the calculation of the travel times were written by Ray Buland, Golden, Colorado. You can get your own copy of the programs from the IRIS/DMC (http://www.iris.washington.edu) Select the body-wave phases all P S PKP SKS basic PP SS PKKP SKKS P+ PcP ScS PKiKP SKKKS S+ Pdiff Sdiff PKIKP P-up S-up Depth of source (km): Epicentral distance (degrees):