Seismic Data

Note: The web version of this archive does not contain the SEG-Y Trace files. These files are very large and would require extremely long download times. To obtain the complete CD-ROM archive, contact USGS Information at (888) ASK-USGS.

The field SEG-Y data files may be processed and plotted using seismic processing software such as Seismic Unix (SU). SU is Unix / Linux public domain software provided by the Colorado School of Mines and is currently located at http://www.cwp.mines.edu/cwpcodes/. A Unix tar file (boom.tar) containing examples of SU scripts is provided in the SEISUNIX subfolder of the SOFTWARE folder located at the top level of this CD-ROM.

The seismic data files are binary encoded and cannot be viewed directly. Attempts to view the files in a text window or browser will result in long loading times and unrecognizable characters being displayed. For this reason the best way to download the data files is to NOT use a WWW browser. To download the data simply open the SEGY folder at the top level of the CD-ROM and select the SEG-Y files you wish to download and either drag and drop these files on your hard drive or use the copy command. The SEG-Y formated files have a .tra extension. The files with a .par extension are parameter files used by the Delph Seismic software. There is no need to download the .par files unless you are using the Delph Seismic software to play back the data. The trim_gga.pln file is also used by the Delph Sesimic software to playback the data.