Publications
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Integration of COCORP deep reflection and magnetic anomaly analysis in the southeastern United States: Implications for origin of the Brunswick and East Coast magnetic anomalies: Alternative interpretation and reply Integration of COCORP deep reflection and magnetic anomaly analysis in the southeastern United States: Implications for origin of the Brunswick and East Coast magnetic anomalies: Alternative interpretation and reply
Integration of magnetic anomaly analysis with COCORP deep reflection data from the southeastern United States provides three new constraints on the interpretation of the Brunswick and East Coast magnetic anomalies, as well as on the reflection data. These are as follows. (1) The source of the Brunswick anomaly lies within the deep crust. This anomaly is not caused by a Mesozoic rift...
Authors
Deborah R. Hutchinson, Kim D. Klitgord, Anne M. Trehu, John H. McBride, Kim Nelson
Origin of Florida Canyon and the role of spring sapping on the formation of submarine box canyons Origin of Florida Canyon and the role of spring sapping on the formation of submarine box canyons
Florida Canyon, one of a series of major submarine canyons on the southwestern edge of the Florida Platform, was surveyed using GLORIA, SeaBeam, and Deep-Tow technologies, and it was directly observed during three DSRV Alvin dives. Florida Canyon exhibits two distinct morphologies: a broad V-shaped upper canyon and a deeply entrenched, flat-floored, U-shaped lower canyon. The flat-...
Authors
Charles K. Paull, Fred N. Spiess, Joseph R. Curray, David C. Twichell
Impact assessment of exploratory wells offshore South Florida Impact assessment of exploratory wells offshore South Florida
No abstract available
Authors
Eugene A. Shinn, Barbara H. Lidz, Phillip A. Dustan
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: August 1990 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: August 1990
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1990 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1990
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: July 1990 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: July 1990
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1990 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1990
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1990 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1990
No abstract available.
Authors
John B. Townshend, Richard V. O’Connell, Carol Ann Varner
Source parameters and effects of bandwidth and local geology on high- frequency ground motions observed for aftershocks of the northeastern Ohio earthquake of 31 January 1986 Source parameters and effects of bandwidth and local geology on high- frequency ground motions observed for aftershocks of the northeastern Ohio earthquake of 31 January 1986
A 10-station array (GEOS) yielded recordings of exceptional bandwidth (400 sps) and resolution (up to 96 dB) for the aftershocks of the moderate (mb ≈ 4.9) earthquake that occurred on 31 January 1986 near Painesville, Ohio. Nine aftershocks were recorded with seismic moments ranging between 9 × 1016 and 3 × 1019 dyne-cm (Mw: 0.6 to 2.3). The two largest aftershocks (depth 5.3, 5.6 km...
Authors
G. Glassmoyer, R. D. Borcherdt
IGRFGRID : a program for creation of a total magnetic field (International Geomagnetic Reference Field) grid representing the earth's main magnetic field, Part B - Source code IGRFGRID : a program for creation of a total magnetic field (International Geomagnetic Reference Field) grid representing the earth's main magnetic field, Part B - Source code
No abstract available.
Authors
Ronald E. Sweeney
A numerical study of some potential sources of error in side-by-side seismometer evaluations A numerical study of some potential sources of error in side-by-side seismometer evaluations
This report presents the results of a series of computer simulations of potential errors in test data, which might be obtained when conducting side-by-side comparisons of seismometers. These results can be used as guides in estimating potential sources and magnitudes of errors one might expect when analyzing real test data. First, the derivation of a direct method for calculating the...
Authors
L. Gary Holcomb