The archived boomer single-channel, seismic reflection data are in standard Society of Exploration Geophysicists (SEG) SEG-Y format (Barry and others, 1975) and may be downloaded for processing with public domain software such as Seismic Unix (SU) ( ). Examples of SU processing scripts are provided in the boom.tar file located in the SEISUNIX subfolder in the SOFTWARE folder at the top level of this CD-ROM. In-house (USGS) DOS and Microsoft Windows compatible software for viewing SEG-Y headers, DUMPSEGY.EXE (Zihlman, 1992) is provided in the USGS_EXE subfolder of the SOFTWARE folder located at the top level of the CD-ROM. The processed boomer profiles, reference maps, and logbooks (all GIF images) may also be viewed with your WWW browser.
The seismic source employed here was a boomer transducer towed on a sled at the sea surface providing 100 joules per shot. The reflected energy was received by an Innovative Transducer Inc. (ITI) solid core streamer and recorded by PC-based Triton-Elics Delph Seismic acquisition software. The ITI streamer contains 10 hydrophones evenly spaced over 6 meters however only data received by elements 5-8 where summed, resulting in a higher signal to noise ratio for the data. The streamer was positioned parallel to the boomer sled and laterally separated from it by 7 m. The sled was towed 20 m behind the GPS antennae. The sample frequency of the data was 16000 Hz and the total record length was 100 ms. The fire rate was every 0.25 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.