User's guide to elastic wavefield modeling with the ELMO software package

Carrie F. Youzwishen, Gary F. Margrave, Chanpen Silawongsawat

The Elmo software package, available as a Matlab program, is an elastic wavefield modeling package. The software models the earth response of 2-D horizontally layered media for a cylindrical P wave source. Within the Fourier domain, each component plane wave of the source is propagated through a computational grid by phase shift and all multiples and mode conversions can be calculated. The software also offers the flexibility of isolating specific wave types and the ability to decompose a seismogram into component wavefields. Finally, Elmo contains a number of parameters designed to attenuate the wavefield in order to reduce algorithm artifacts.