Publications
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Fourier power spectra of the geomagnetic field for circular paths on the Earth's surface. Fourier power spectra of the geomagnetic field for circular paths on the Earth's surface.
The Fourier power spectra of geomagnetic component values, synthesized from spherical harmonic models, have been computed for circular paths on the Earth's surface. They are not found to be more useful than is the spectrum of magnetic energy outside the Earth for the purpose of separating core and crustal sources of the geomagnetic field. The Fourier power spectra of N and E geomagnetic...
Authors
L.R. Alldredge, E.R. Benton
Seismic measurements of the internal properties of fault zones Seismic measurements of the internal properties of fault zones
The internal properties within and adjacent to fault zones are reviewed, principally on the basis of laboratory, borehole, and seismic refraction and reflection data. The deformation of rocks by faulting ranges from intragrain microcracking to severe alteration. Saturated microcracked and mildly fractured rocks do not exhibit a significant reduction in velocity, but, from borehole...
Authors
Walter D. Mooney, A. Ginzburg
PERSPECTIVE ON LANDSLIDE DAMS. PERSPECTIVE ON LANDSLIDE DAMS.
The most common types of mass movements that form landslide dams are rock and soil slumps and slides; mud, debris, and earth flows: and rock and debris avalanches. The most common initiation mechanisms for dam-forming landslides are excessive rainfall and snow melt, and earthquakes. Most landslide dams are remarkable short-lived. In a sample of 63 documented cases, 22 percent of the...
Authors
Robert L. Schuster, John E. Costa
Book review of Slope Instability, D. Brunsden and D.B. Prior, eds., Wiley, New York, 620 p. Book review of Slope Instability, D. Brunsden and D.B. Prior, eds., Wiley, New York, 620 p.
No abstract available.
Authors
Richard M. Iverson
Signs of a northeastern earthquake? Signs of a northeastern earthquake?
No abstract available.
Authors
R.L. Kerr
Parkfield earthquake looks to be on schedule Parkfield earthquake looks to be on schedule
No abstract available.
Authors
R. A. Kerr
Maps of debris-flow features evident after the storms of December 1955 and January 1982, Montara Mountain area, California Maps of debris-flow features evident after the storms of December 1955 and January 1982, Montara Mountain area, California
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Landslides Landslides
The slopes above streams and rivers are subjected to a variety of processes that cause them to recede and retreat from the river or stream channel. These processes, collectively called mass wasting, can be classified according to rapidity of movement and according to the type of materials that are transported. Gravity is the force behind all such downslope movement. Factors that enable...
Authors
Europa: Characterization and interpretation of global spectral surface units Europa: Characterization and interpretation of global spectral surface units
The Voyager global multispectral mosaic of the Galilean satellite Europa (T. V. Johnson, L. A. Soderblom, J. A. Mosher, G. E. Danielson, A. F. Cook, and P. Kupferman, 1983, J. Geophys. Res. 88, 5789–5805) was analyzed to map surface units with similar optical properties (T. B. McCord, M. L. Nelson, R. N. Clark, A. Meloy, W. Harrison, T. V. Johnson, D. L. Matson, J. A. Mosher, and L...
Authors
M. L. Nelson, T. B. McCord, Roger N. Clark, T. V. Johnson, D. L. Matson, J. A. Mosher, Laurence A. Soderblom
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: May 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: May 1986
No abstract available.
Authors
John B. Townshend, J.E. Papp, H.K. Rex, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: November 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: November 1986
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, H.K. Rex, L.Y. Torrence