U.S. Geological Survey Data Series 348
The seismic data files are binary encoded and cannot be viewed directly. The best way to download these files is to open the SEGY folder, select the SEG-Y files you wish to download, and drag and drop these files onto your hard drive or use the File > Copy command.
The SEG-Y formatted trace files have a .tra extension. A detailed description of the data format can be found on the SEG-Y Format page.
NOTE: These files may be extremely large. The SEG-Y files for 02LCA02 range in size from 1 to 11 MB.