Summary for Field Activity Number 1986-018-FA

Alternate Leg ID: GL86

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

Dates: August 30, 1986 to September 05, 1986

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).

USGS Project Number: GLIMPCE

Contact: Anne Trehu ()

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