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U.S. Geological Survey Data Series 348

How to Download SEG-Y Data


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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.


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