Publications
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A C language implementation of the SRO (Murdock) detector/analyzer A C language implementation of the SRO (Murdock) detector/analyzer
A signal detector and analyzer algorithm was described by Murdock and Hutt in 1983. The algorithm emulates the performance of a human interpreter of seismograms. It estimates the signal onset, the direction of onset (positive or negative), the quality of these determinations, the period and amplitude of the signal, and the background noise at the time of the signal. The algorithm has...
Authors
James N. Murdock, Scott E. Halbert
Summary of Geotechnical and Hydrologic Data Collected From May 1, 1990 through April 30, 1991, for the Alani-Paty Landslide, Manoa Valley, Honolulu, Hawaii Summary of Geotechnical and Hydrologic Data Collected From May 1, 1990 through April 30, 1991, for the Alani-Paty Landslide, Manoa Valley, Honolulu, Hawaii
No abstract available.
Authors
Rex L. Baum, Mark E. Reid, Cynthia A. Wilburn, Jill D. Torikai
High-energy carbonate-sand accumulation, the Quicksands, southwest Florida Keys High-energy carbonate-sand accumulation, the Quicksands, southwest Florida Keys
High-resolution seismic-reflection profiles of the Quicksands, located along a broad ridge on the platform shelf west of Key West, Florida, indicate a significant deposit of non-oolitic carbonate sand occurs in a belt 47 km long by 28 km wide. The surface of the belt is ornamented by large (5 m), migrating tidal bars, oriented in a north-south direction, on which sand waves, oriented in...
Authors
Eugene A. Shinn, Barbara H. Lidz, Charles W. Holmes
Imaging the midcontinent rift beneath Lake Superior using large aperture seismic data Imaging the midcontinent rift beneath Lake Superior using large aperture seismic data
We present a detailed velocity model across the 1.1 billion year old Midcontinent Rift System (MRS) in central Lake Superior. The model was derived primarily from onshore-offshore large-aperture seismic and gravity data. High velocities obtained within a highly reflective half-graben that was imaged on coincident seismic reflection data demonstrate the dominantly mafic composition of the...
Authors
Anne M. Trehu, Patrick Morel-a-l’Huissier, R. Meyer, Z. Hajnal, J. Karl, R.F. Mereu, John L. Sexton, J. Shay, W. K. Chan, D. Epili, T. Jefferson, X. R. Shih, S. Wendling, Bernd Milkereit, A. Green, Deborah R. Hutchinson
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Publications of the Branch of Atlantic Marine Geology for Calendar Year 1990 Publications of the Branch of Atlantic Marine Geology for Calendar Year 1990
This U.S. Geological Survey Open-File Report [extract] contains a listing of publications authored or co-authored by members of the Branch of Atlantic Marine Geology and published in calendar year 1990. The Branch conducts a broad geologic and geophysical research and mapping program, primarily along the U.S. Atlantic Margin, in the Great Lakes, the Gulf of Mexico, the Caribbean and...
Authors
Margaret C. Mons-Wengler, Robert N. Oldale
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, November 1991 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, November 1991
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Geodetic estimate of coseismic slip during the 1989 Loma Prieta, California, Earthquake Geodetic estimate of coseismic slip during the 1989 Loma Prieta, California, Earthquake
Offsets in the relative positions of geodetic stations resulting from the Loma Prieta earthquake can be explained with a dislocation model that includes buried oblique slip on a rupture surface extending 37 km along the strike of the San Andreas fault, dipping 70° to the SW, and extending from a depth of about 5 to 17.5 km. Assuming uniform slip on a rectangular surface, the mean values...
Authors
Michael Lisowski, W.H. Prescott, James C. Savage, M. J. Johnson