National Geophysical Data Center
MULTICHANNEL COMMON DEPTH POINT (CDP)
SEISMIC REFLECTION DATA
ADDITIONAL ATLANTIC SURVEY LINES
Data Announcement 1979N-N
The National Geophysical Data Center 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.
Please contact NGDC for prices.