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U.S. Geological Survey Data Series 421

Lake Colby Seismic Profiles

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Below are thumbnail images of each line with links to full-size printable and interactive seismic reflection profiles. The printable profiles are GIF images that were filtered and gained using Seismic Unix software. These images are stored in the PRINTABLE folder. Refer to the Software page for details about the processing and examples of the processing scripts. The processed SEG-Y data were exported to CTI SonarWeb software to produce interactive profiles that allow the user to obtain a geographic location and depth for a cursor position on the profile. This information is displayed in the status bar of the browser. The interactive profiles, which are stored in the INTERACTIVE folder, have been corrected for the offset between the shotpoint and GPS antenna (see fig. 1).

The Lake Colby map illustrates the locations of the interactive and printable profiles presented below.

Table 2 lists trackline statistics for 08LCA01.

NOTE: The only supported Web browsers that properly display all features of the interactive profiles are Internet Explorer 6 or greater for Windows and Firefox 1.5 or greater for all platforms. Use of other browsers may result in spurious or no information given in the status window. Firefox may be downloaded at

Browser setup for viewing interactive profiles:
For all browsers, the status bar and JavaScript must be enabled. Firefox also requires "Change status bar text" to be checked under Advanced JavaScript Options.

If using Internet Explorer 7, Active Content/ActiveX controls must be disabled. Instructions for doing this can be found by clicking on the "details and setup" link on the interactive profile pages.

SEG-Y Format
How to Download SEG-Y Data
FGDC Metadata

Additional Seismic Profile Pages:

Lake Colby | Lake Helen | Trout Lake | Lake Searcy | Lake Saunders | Big Lake | Lake Prevatt | Three Island Lakes | Johns Lake | Lake Avalon

Line: 08b01  1051 traces:
Start of line:   08b01     SHOT=1   day=84 hour=17  minute=48  sec=52
End of line:   08b01  SHOT=1051   day=84 hour=17  minute=57  sec=37
08b01 thumbnail

Line: 08b02   482 traces:
Start of line:   08b02     SHOT=1   day=84 hour=17  minute=57  sec=37
End of line:   08b02   SHOT=482   day=84 hour=18   minute=1  sec=38
08b02 thumbnail

Line: 08b03   867 traces:
Start of line:   08b03     SHOT=1   day=84 hour=18   minute=1  sec=38
End of line:   08b03   SHOT=867   day=84 hour=18   minute=8  sec=51
08b03 thumbnail

Line: 08b04   309 traces:
Start of line:   08b04     SHOT=1   day=84 hour=18   minute=8  sec=52
End of line:   08b04   SHOT=309   day=84 hour=18  minute=11  sec=26
08b04 thumbnail

Line: 08b05   232 traces:
Start of line:   08b05     SHOT=1   day=84 hour=18  minute=11  sec=26
End of line:   08b05   SHOT=232   day=84 hour=18  minute=13  sec=22
08b05 thumbnail

Line: 08b06   570 traces:
Start of line:   08b06     SHOT=1   day=84 hour=19  minute=11  sec=47
End of line:   08b06   SHOT=570   day=84 hour=19  minute=16  sec=32
08b06 thumbnail

Line: 08b07   336 traces:
Start of line:   08b07     SHOT=1   day=84 hour=19  minute=16  sec=32
End of line:   08b07   SHOT=336   day=84 hour=19  minute=19  sec=20
08b07 thumbnail

Line: 08b08   415 traces:
Start of line:   08b08     SHOT=1   day=84 hour=19  minute=19  sec=20
End of line:   08b08   SHOT=415   day=84 hour=19  minute=22  sec=47
08b08 thumbnail

Line: 08b09   388 traces:
Start of line:   08b09     SHOT=1   day=84 hour=19  minute=22  sec=48
End of line:   08b09   SHOT=388   day=84 hour=19  minute=26   sec=1
08b09 thumbnail

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Page Last Modified: March 26, 2009 17:37 EST