National Centers for Environmental Information (NCEI)
MULTICHANNEL COMMON DEPTH POINT (CDP)
SEISMIC REFLECTION DATA
ADDITIONAL ATLANTIC SURVEY LINES
Data Announcement 1979N-N
The National Geophysical Data Center (now the National Centers for Environmental Information) is making available
additional CDP seismic reflection data (lines 7, 8, 11, 12, and
13). These data were collected as part of a program by the U.S.
Geological Survey (USGS) to survey the geological framework of
the United States coastal areas.
These data were collected by Digicon Geophysical Corporation in
1975 using a 48-channel streamer (3600 m long) and a 27.9-cubic
liter airgun array. The processing, which was performed by
William C. Patterson (USGS, Denver) on the Phoenix "I", included:
demultiplexing and resampling, geometry and common-depth point
definition, velocity analysis, noise muting, bandpass filtering,
time-variant filtering, time-variant deconvolution, and automatic
gain control (AGC) scaling. Sections are available in full scale
(2.5 inches/sec) only.
Lines 7, 8, 11, 12, and 13 are available on sepia and blackline.
The following documentation is provided with each line:
- location maps (sepia or blackline)
- velocity profiles (microfilm)
- shot point listings (microfilm)
- copies of supportive USGS Open File Reports:
OFR 78-474 - Mid-Atlantic Multichannel Seismic
Profiles 11, and 12A, B, C, and D,
OFR 78-685 - Mid-and North Atlantic Multichannel Seismic
Reflection Profiles 7, 8A, B, and C,
12E, F, G, H, I, and J, and
13A, B, C, D, E, F, G, and H.
Shot-point navigation is available on magnetic tape or CD-ROM.