Early geophysics was concerned with the shape and the structure of earth and eventually evolved into analysis and measurement of spatial and temporal variations of fields of energy such as motion, gravity, heat, magnetism, radioactivity, electricity and electromagnetism. These measurements reveal discontinuities in spatial variations of rock properties that correspond to geological and facies boundaries. We specialize in survey planning and data analyses for small scale as well as large scale investigations. Many of the projects are in exploration and production work for the petroleum industry. Due to recent increase in activity, we have restricted our attention to processing, numerical modeling, and advising on data quality issues of surface seismic, borehole seismic, crosswell seismic and borehole sonic field data.