Seismology Laboratory and Computing Facilities
The Reflection Seismology Laboratory consists of a workstation based interactive processing system. We have several dedicated SGI workstations and a Sun Ultra with a total of 164 GByte external disk space. These workstations provide a variety of platforms for seismic data analysis. In addition the Reflection Seismology Laboratory contains several Macintosh computers and PCs for word processing, graphics applications, and some components of seismic data reduction.

We run OMEGA seismic processing software produced by Western Geophysical on Silicon Graphics workstations. This software has capabilities for both interactive and batch processing of 2-D and 3-D seismic data through initial brute stack and final migrated sections. A particularly nice feature of this system is the ability to display gathers on the screen and test various processing parameters interactively for gain control, filter design, trace correlation, spectral analysis, deconvolution, mute, f-k filter design, and velocity analysis. The interactive feature allows the user to move through large volumes of data with relative ease choosing parameters carefully as data quality and character change with changing geology. Interactive processing parameters are saved in a file for later use in batch processing. The software package contains a variety of advanced data processing options for multiple attenuation, noise reduction, waveform processing, synthetic seismogram generation, attibute analysis, amplitude vs. offset (AVO) analysis, tau-p transform, and both pre-stack and post-stack imaging. We run SEISVISION for 3-D data interpretation. This software includes a full suite of applications for importing data, fault and stratigraphic horizon interpretation and mapping, surface and isopach, contouring, conversion from time to depth, data visualization, and display. In addition to the reflection data processing and interpretation we have the standard USGS wide angle reflection/refraction analysis package based on Cerveny asymptotic ray tracing, and several travel time inversion schemes. This software allows us to forward model traveltimes and amplitudes of wide-aperture seismic data sets as well as invert traveltime data for velocity structure. In addition we have a variety of software for analysis and display of earthquake data including: DATASCOPE, HYPOCENTER, xmap, GMT, and FPFIT/FPPLOT.

A variety of input and output devices are available: 3480 tape cartridge, 8mm exabyte tape drive, 4mm DAT drive, CD ROM, player, laserwriter, scanner, film recorder, 24-inch electrostatic plotter, and 36-inch HP color plotter.

Seismology Field Equipment
For seismic data acquisition we have a Bison 9048 DIFP seismograph. This is a multichannel (48 channels), lightweight, portable seismograph, with over 130 dB of dynamic range to acquire high quality, high resolution seismic reflection and refraction data. We also have geophones, cables, and a field computer to complete the seismic field acquisition system. We also have a GSSI SIR-System 2 Ground Penetrating Radar unit to image shallow earth structure. GPR data can augment and complement subsurface information from seismic profiling in a wide variety of both geologic and environmental applications and is particularly useful in shallow fresh water lakes. We also operate and maintain a permanent seismic station on the Lehigh Campus.