USGS OF 2004-1247, Lake Mohave Geophysical Survey 2002: Seismic

Lake Mohave Geophysical Survey 2002: GIS Data Release
OF 2004-1247

OF 2004-1247 HOME

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Introduction

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Metadata/Data Catalog

References Cited

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Seismic-Reflection:

The more than 410 km of seismic-reflection data were acquired with a Knudsen Chirp subbottom profiling system with a central frequency of 3.5 kHz. These data were logged to a PC laptop running Knudsen acquisition software. This particular system uses range, as opposed to fire-rate, to describe the data acquisition. The ranges used on this cruise were 50m, and 100m. This system is further described on the USGS Woods Hole Science Center SeaFloor Mapping web page. After the cruise, these seismic data were processed with SIOSEIS seismic processing software to rectify the data and convert it to "true" Chirp data containing instantaneous amplitude data. In addition, shot numbers for each file were renumbered to start at 1. These processed SEG-Y files were then run through Seismic Unix to generate images of each seismic-reflection profile.

The following three images indicate the tracklines along which seismic-reflection data were collected. The images progress from north to south. Clicking on any image will open a larger image of the same area.

For convenience, downsampled JPEG images are available below for viewing the data. Clicking on the thumbnail image of the seismic-reflection profile will link to a larger image of the seismic data for that particular file in a separate window. In each of the seismic profiles, the units of the x-axis are shot points, the y-axis is two-way travel time in milliseconds. The JPEG images can be downloaded in a variety of ways. To acquire an individual image, click on the thumbnail image which will link to a larger image. In Internet Explorer, right click on this image and select "Save image as...". The individual images can also be copied from the CD directly from the data/seisimages directory. To acquire a WinZip file of all the seismic images, go to the seismic section of the Metadata/Data Catalog page and save the "zipped" file to a preferred location and uncompress it.

What appears to be missing or skipped line numbers is a result of navigation or instrument difficulties during which no data was collected.

File L001
Start of file: SHOT=1 day=108 hour=18 minute=13 sec=25
End of file: SHOT=16280 day=108 hour=19 minute=34 sec=49

File L002
Start of file: SHOT=1 day=108 hour=19 minute=39 sec=35
End of file: SHOT=2462 day=108 hour=19 minute=51 sec=54

File L003
Start of file: SHOT=1 day=108 hour=20 minute=01 sec=31
End of file: SHOT=19778 day=108 hour=21 minute=40 sec=26

File L004
no navigation available - L005 is a rerun of this line

File L005
Start of file: SHOT=1 day=109 hour=23 minute=59 sec=11
End of file: SHOT=13971 day=110 hour=01 minute=09 sec=26

File L006
Start of file: SHOT=1 day=110 hour=14 minute=33 sec=38
End of file: SHOT=11041 day=110 hour=15 minute=28 sec=50

File L007
Start of file: SHOT=1 day=110 hour=15 minute=56 sec=24
End of file: SHOT=9939 day=110 hour=16 minute=46 sec=08

File L008
Start of file: SHOT=1 day=110 hour=17 minute=16 sec=13
End of file: SHOT=20091 day=110 hour=18 minute=56 sec=47

File L009
Start of file: SHOT=1 day=110 hour=18 minute=56 sec=55
End of file: SHOT=15856 day=110 hour=20 minute=16 sec=12

File L010
Start of file: SHOT=1 day=111 hour=15 minute=05 sec=47
End of file: SHOT=18722 day=111 hour=16 minute=39 sec=23

File L012
Start of file: SHOT=1 day=111 hour=16 minute=58 sec=14
End of file: SHOT=17667 day=111 hour=18 minute=26 sec=39

File L014
Start of file: SHOT=1 day=111 hour=19 minute=42 sec=29
End of file: SHOT=13557 day=111 hour=20 minute=50 sec=16

File L015
Start of file: SHOT=1 day=111 hour=21 minute=01 sec=57
End of file: SHOT=11289 day=111 hour=21 minute=58 sec=24

File L016
Start of file: SHOT=1 day=111 hour=22 minute=03 sec=45
End of file: SHOT=8846 day=111 hour=22 minute=47 sec=59

File L017
Start of file: SHOT=1 day=111 hour=22 minute=54 sec=48
End of file: SHOT=653 day=111 hour=22 minute=58 sec=03

File L019
Start of file: SHOT=1 day=111 hour=22 minute=58 sec=33
End of file: SHOT=5503 day=111 hour=23 minute=26 sec=04

File L020
Start of file: SHOT=1 day=112 hour=00 minute=33 sec=13
End of file: SHOT=2083 day=112 hour=00 minute=43 sec=38

File L021
Start of file: SHOT=1 day=112 hour=00 minute=46 sec=30
End of file: SHOT=5363 day=112 hour=01 minute=13 sec=19

File L022
Start of file: SHOT=1 day=112 hour=01 minute=16 sec=48
End of file: SHOT=3835 day=112 hour=01 minute=35 sec=58

File L023
Start of file: SHOT=1 day=112 hour=01 minute=39 sec=35
End of file: SHOT=3256 day=112 hour=01 minute=55 sec=51

File L024
Start of file: SHOT=1 day=112 hour=14 minute=52 sec=53
End of file: SHOT=16309 day=112 hour=16 minute=14 sec=26

File L025
Start of file: SHOT=1 day=112 hour=16 minute=27 sec=14
End of file: SHOT=11503 day=112 hour=17 minute=24 sec=45

File L026
Start of file: SHOT=1 day=112 hour=17 minute=33 sec=17
End of file: SHOT=10631 day=112 hour=18 minute=26 sec=26

File L027
Start of file: SHOT=1 day=112 hour=18 minute=26 sec=42
End of file: SHOT=11520 day=112 hour=19 minute=24 sec=17

File L028
Start of file: SHOT=1 day=112 hour=19 minute=29 sec=54
End of file: SHOT=10133 day=112 hour=20 minute=20 sec=34

File L029
Start of file: SHOT=1 day=112 hour=20 minute=23 sec=53
End of file: SHOT=6704 day=112 hour=20 minute=57 sec=24

File L030
Start of file: SHOT=1 day=112 hour=21 minute=03 sec=49
End of file: SHOT=7923 day=112 hour=21 minute=43 sec=26

File L031
Start of file: SHOT=1 day=112 hour=21 minute=59 sec=50
End of file: SHOT=5811 day=112 hour=22 minute=28 sec=53

File L032
Start of file: SHOT=1 day=113 hour=15 minute=37 sec=32
End of file: SHOT=5112 day=113 hour=16 minute=03 sec=06

File L033
Start of file: SHOT=1 day=113 hour=16 minute=14 sec=48
End of file: SHOT=6570 day=113 hour=16 minute=47 sec=39

File L034
Start of file: SHOT=1 day=113 hour=16 minute=49 sec=09
End of file: SHOT=7158 day=113 hour=17 minute=24 sec=56

File L035
Start of file: SHOT=1 day=113 hour=17 minute=31 sec=51
End of file: SHOT=28830 day=113 hour=19 minute=56 sec=00

File L036
Start of file: SHOT=1 day=113 hour=19 minute=56 sec=08
End of file: SHOT=28054 day=113 hour=22 minute=16 sec=24

File L037
Start of file: SHOT=1 day=113 hour=22 minute=18 sec=22
End of file: SHOT=13777 day=113 hour=23 minute=27 sec=16

File L038
Start of file: SHOT=1 day=114 hour=00 minute=06 sec=46
End of file: SHOT=9898 day=114 hour=00 minute=56 sec=16

File L039
Start of file: SHOT=1 day=114 hour=16 minute=14 sec=07
End of file: SHOT=9310 day=114 hour=17 minute=00 sec=40

File L040
Start of file: SHOT=1 day=114 hour=17 minute=42 sec=44
End of file: SHOT=2242 day=114 hour=17 minute=53 sec=56

File L041
Start of file: SHOT=1 day=114 hour=17 minute=56 sec=28
End of file: SHOT=2530 day=114 hour=18 minute=09 sec=06

File L042
Start of file: SHOT=1 day=114 hour=18 minute=11 sec=13
End of file: SHOT=2188 day=114 hour=18 minute=22 sec=09

File L043
Start of file: SHOT=1 day=114 hour=18 minute=25 sec=17
End of file: SHOT=955 day=114 hour=18 minute=30 sec=04

File L044
Start of file: SHOT=1 day=114 hour=18 minute=35 sec=13
End of file: SHOT=287 day=114 hour=18 minute=36 sec=38

File L046
Start of file: SHOT=1 day=114 hour=18 minute=55 sec=24
End of file: SHOT=16986 day=114 hour=20 minute=20 sec=20

File L047
Start of file: SHOT=1 day=114 hour=20 minute=29 sec=26
End of file: SHOT=9347 day=114 hour=21 minute=16 sec=10

File L048
Start of file: SHOT=1 day=114 hour=21 minute=18 sec=04
End of file: SHOT=2603 day=114 hour=21 minute=31 sec=05

File L049
Start of file: SHOT=1 day=114 hour=21 minute=32 sec=17
End of file: SHOT=8591 day=114 hour=22 minute=15 sec=15

File L050
Start of file: SHOT=1 day=114 hour=22 minute=19 sec=01
End of file: SHOT=20581 day=115 hour=00 minute=02 sec=19

File L051
Start of file: SHOT=1 day=115 hour=00 minute=02 sec=28
End of file: SHOT=9610 day=115 hour=00 minute=50 sec=31

File L052
Start of file: SHOT=1 day=115 hour=00 minute=51 sec=13
End of file: SHOT=5595 day=115 hour=01 minute=19 sec=11

File L053
Start of file: SHOT=1 day=115 hour=14 minute=52 sec=36
End of file: SHOT=12439 day=115 hour=15 minute=54 sec=47

File L054
Start of file: SHOT=1 day=115 hour=15 minute=55 sec=03
End of file: SHOT=4857 day=115 hour=16 minute=19 sec=20

File L055
Start of file: SHOT=1 day=115 hour=16 minute=19 sec=36
End of file: SHOT=30353 day=115 hour=18 minute=51 sec=22

File L056
Start of file: SHOT=1 day=115 hour=18 minute=51 sec=57
End of file: SHOT=20407 day=115 hour=20 minute=33 sec=59

File L057
Start of file: SHOT=1 day=118 hour=15 minute=20 sec=25
End of file: SHOT=4284 day=118 hour=15 minute=41 sec=50

File L058
Start of file: SHOT=1 day=118 hour=15 minute=48 sec=57
End of file: SHOT=5859 day=118 hour=16 minute=18 sec=14

File L059
Start of file: SHOT=1 day=118 hour=16 minute=27 sec=34
End of file: SHOT=7034 day=118 hour=17 minute=02 sec=44

File L060
Start of file: SHOT=1 day=118 hour=17 minute=10 sec=52
End of file: SHOT=6454 day=118 hour=17 minute=43 sec=08