Publications
Filter Total Items: 2148
Preliminary study of methods for upgrading USGS Antarctic seismological capability
The purpose of this study is to evaluate potential methods for obtaining higher quality seismic data from Antarctica. Currently, USGS-sponsored WWSSN stations are located at Scott Base, Sanae Base, and at South Pole Station. Scott and Sanae Stations are located near the coast; data obtained from coastal installations are normally degraded by noise generated by ocean wave action on the coast. Opera
Authors
L. Gary Holcomb
Geomagnetic local and regional harmonic analyses.
Procedures are developed for using rectangular and cylindrical harmonic analyses in local and regional areas. Both the linear least squares analysis, applicable when component data are available, and the nonlinear least squares analysis, applicable when only total field data are available, are treated. When component data are available, it is advantageous to work with residual fields obtained by s
Authors
L.R. Alldredge
International geomagnetic reference field 1980: a report by IAGA Division I working group.
Describes the recommendations of the working group, which suggested additions to IGRF because of the cumulative effect of the inevitable uncertainties in the secular variation models which had led to unacceptable inaccuracies in the IGRF by the late 1970's. The recommendations were accepted by the International Association of Geomagnetism and Aeronomy on August 15, 1981 at the 4th Scientific Assem
Authors
N. W. Peddie
Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii
Piton de la Fournaise, on the island of La Réunion, and Kilauea volcano, on the island of Hawaii, are active, basaltic shield volcanoes growing on the flanks of much larger shield volcanoes in intraplate tectonic environments. Past studies have shown that the average rate of magma production and the chemistry of lavas are quite similar for both volcanoes. We propose a structural similarity — speci
Authors
Wendell A. Duffield, Laurent Stieltjes, Jacques Varet
Paleomagnetic data from the Coso Range, California and current status of the Cobb Mountain normal geomagnetic polarity event
Two basalt flows which erupted about 1.08 m.y. ago in the Coso Range, California, have normal magnetic polarity and thus provide additional evidence for the Cobb Mountain normal polarity event. A review of available data confirms that this event was of geomagnetic origin. A mean age of 1.10 ± 0.02 m.y. B.P. for the Cobb Mountain normal polarity event was found to best fit all available radiometric
Authors
Edward A. Mankinen, C. Sherman Grommé
Landslides and related features, Virginia, Kentucky, and Tennessee; part of the Johnson City 1 degree by two degrees sheet
No abstract available.
Authors
William F. Outerbridge
Landslides and related features, Tennessee — Columbia 1° by 2° sheet
No abstract available.
Authors
Roger E. Thomas
Landslides and related features, Kentucky, West Virginia, and Virginia -- Northern half of Jenkins 1° x 2° sheet
No abstract available.
Authors
William F. Outerbridge
Landslides and related features, Kentucky and Tennessee, Corbin 1° x 2° sheet
No abstract available.
Authors
Alfred R. Taylor, Roger E. Thomas
Landslides and related features, Alabama and Tennessee - Rome 1° x 2° sheet
No abstract available.
Authors
Roger E. Thomas
Landslides and related features, Alabama and Tennessee - Gadsden 1° x 2° sheet
No abstract available.
Authors
John S. Pomeroy