National Centers for Environmental Information (NCEI)

MULTICHANNEL SEISMIC REFLECTION DATA
North Bering Sea - Gulf of Anadyr

Data Announcement 83-MGG-02

Approximately 1,800 line km of 24-channel seismic-reflection data in the Gulf of Anadyr and across the Navarin Basin. The data were collected during 1980 from the U.S. Geological Survey (USGS) Research Ship (S.P. LEE using a sound source of 5 airguns totaling 1,325 cubic inches.*

The recording equipment consists of a 24-channel streamer, 2,400 m long, with a group interval of 100 m, and a Global Universal Science (GUS) Model 4200 digital recording system. Shot records were recorded at a 2-msec sample rate and were later processed at a 4-msec rate. Navigational control of the survey was by satellite fixes integrated with Loran C (Rho-Rho) and Doppler- sonar bottom-track navigation. The seismic-reflection records vary from 10 to 12 sec in length, depending upon water depth and geologic structure. The first 10 sec of the shot records were edited, stacked, deconvolved filtered, and displayed on an electrostatic plot. The USGS has provided these data to the National Geophysical Data Center (NGDC) (now the National Centers for Environmental Information (NCEI)) for public dissemination.

* Multichannel Seismic-Reflection Profiles Collected in 1980 in the North Bering Sea, by Michael S. Marlow, Alan K. Cooper, Gregory L. Smith, and Thomas E. Chase, USGS Open File Report 82- 1090, Geological Survey, U.S. Dept. of Interior.

DATA AVAILABLE

1. Multichannel Common Depth Point data for 14 sections from 14 lines are available in plastic sepia, paper sepia, blackline and 35-mm Microfilm.

2. Post-Plot Navigation Maps:
     a. OFR 82-1090 trackline available in plastic sepia, paper sepia, blackline and 35-mm Microfilm.

Please call for total package prices.

Digital Navigation is available separately on magnetic tape
    9-track, 1600 bpi, ASCII. This is also available on CD-ROM.

Digital Velocity - Time Pairs on magnetic tape
    9-track, 1600 bpi, ASCII (includes listing)

Also available as printout