National Geophysical Data Center
MULTICHANNEL SEISMIC-REFLECTION PROFILES Western Gulf of Alaska USGS Open File Report 84-7
Data Announcement 84-MGG-11
Approximately 2,382 line km of 24-channel seismic-reflection
profiles are now available from the western Gulf of Alaska. The
profiles were collected during the summer of 1977 on the U.S.
Geological Survey (USGS) Research Vessel S.P. LEE using a sound
source of five airguns with a volume of 1,326 cu. in. of air
compressed to approximately 1,900 psi. The recording system
consisted of a 24-group streamer, 2,400 m long and a GUS (Global
Universal Science) model 4200 recording instrument. Shots were
fired every 50 m and the group interval was 100 m. A 2-msec
sampling rate was used in the field and the data were later
desampled to 4 msec during the demultiplexing process.
Navigational control for the survey was by a Marconi integrated
satellite/doppler sonar navigation system. Record lengths vary
from 7 to 13 sec, depending on water depth with 6- to 7-sec
recorded penetration below the seafloor. The U.S. Geological
Survey, Dept. of Interior, has provided these data to NGDC for
Please contact NGDC for prices.