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Multichannel seismic-reflection data collected in 1980 in the eastern Chukchi Sea

Open-File Report 86-405

By:
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Abstract

The U.S. Geological Survey (USGS) collected approximately 2,652 km of 24-channel seismic-reflection data in early September, 1980, over the continental shelf in the eastern Chukchi Sea (Fig. 1). The profiles were collected on the USGS Research Vessel S.P. Lee. The seismic energy source consisted of a tuned array of five airguns with a total volume of 1213 cubic inches of air compressed to approximately 1900 psi. The recording system consisted of a 24-channel, 2400 meter long streamer with a group interval of 100 m, and a GUS (Global Universal Science) model 4200 digital recording instrument. Shots were fired every 50 meters. Navigational control for the survey was provided by a Magnavox integrated navigation system using transit satellites and doppler-sonar augmented by Loran C (Rho-Rho). A 2-millisecond sampling rate was used in the field; the data were later desampled to 4-milliseconds during the demultiplexing process. 8 seconds data length was recorded. Processing was done at the USGS Pacific Marine Geology Multichannel Processing Center in Menlo Park, California, in the sequence: editing-demultiplexing, velocity analysis, CDP stacking, deconvolution-filtering, and plotting on an electrostatic plotter. Plate 1 is a trackline chart showing shotpoint navigation.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Multichannel seismic-reflection data collected in 1980 in the eastern Chukchi Sea
Series title:
Open-File Report
Series number:
86-405
Year Published:
1986
Language:
English
Publisher:
U.S. Geological Survey
Description:
Report: 4 p.; Plate: 34.12 x 33.84 inches
Country:
United States
State:
Alaska
Other Geospatial:
Chukchi Sea