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Summary Information for Field Activity 1986-018-FA

Area of Operations: Lake Superior, Great Lakes, United States, Canada, North America

Dates: August 30, 1986 to September 05, 1986

Chief scientist: Anne Trehu

Objectives: This course was part of a large-scale effort by the U.S. Geological Survey and the Geological Survey of Canada to image the deep crustal structure of the Great Lakes region. This report covers the operations of the ocean bottom seismometers (OBSes), which were deployed along a line across Lake Superior to record large-offset seismic data from a series of shots generated by a commercial contract vessel.

Type of Activity: Seismic profiling;

Information to be derived: Seismic data recordings

Summary: During the first leg, instruments were deployed at each of five stations occupied and ranges were measured acoustically from 4-5 points around the deployment site. Instruments were retrieved during the second leg. Preliminary plots of record sections indicate that the data are of excellent quality. Good signal-to-noise ratios were obtained out to the largest offsets recorded (185 km).

Contact: Anne Trehu ()

InfoBank: uses the identifier K-1-86-LS. Visit this site for more information.

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Publications resulting from these data

Hutchinson, D.R., Morel-a-l'Huissier, P., Meyer, H., Asudeh, I., Ervin, P., Hajnal, Z., Karl, J., Mereu, R., Meyer, R., Sexton, J., Spencer, C., and Trehu, A.,1988, A description of GLIMPCE, 1986, large offset seismic experiment from the Great Lakes: U.S. Geological Survey Open-File Report 88-431, 91 p.. (Available as a PDF version). (Also available at

Miller, G. K., and Dodd, J. E.,1986, Magnetic tape format for the USGS ocean bottom seismometer: U.S. Geological Survey Open-File Report 86-256, 9 p.. (Available as a PDF version). (Also available at

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Script last modified Wednesday, 17th December, 2014 @ 10:53am