Publications
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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 landslide dams
Authors
Robert L. Schuster, John E. Costa
Antarctica: Measuring glacier velocity from satellite images
Many Landsat images of Antarctica show distinctive flow and crevasse features in the floating part of ice streams and outlet glaciers immediately below their grounding zones. Some of the features, which move with the glacier or ice stream, remain visible over many years and thus allow time-lapse measurements of ice velocities. Measurements taken from Landsat images of features on Byrd Glacier agre
Authors
Baerbel K. Lucchitta, H.M. Ferguson
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. Soderblom, 198
Authors
M. L. Nelson, T. B. McCord, Roger N. Clark, T. V. Johnson, D. L. Matson, J. A. Mosher, Laurence A. Soderblom
Economic Losses and Fatalities Due to Landslides
Annual losses in the United States, Japan, Italy, and India have been estimated at 1 billion or more each. During the period 1971-74, nearly 600 people per year were killed by landslides worldwide; about 90 percent of these deaths occurred in the Circum-Pacific region. From 1967-82, 150 people per year died in Japan as a result of slope failures. In the United States, the number of landslide-relat
Authors
Robert L. Schuster, Robert W. Fleming
Some Techniques for Reducing Landslide Hazards
Many techniques are available for reducing landslide hazards; 27 are described in this paper. Prerequisites for the successful use of these techniques are hazard information understandable to nongeologists and adequate communication of this information to those who will, or are required to, use it. It is concluded that certain factors needed to ensure the lasting effectiveness of these techniques
Authors
William J. Kockelman
LANDSLIDE DAMMED LAKES AT MOUNT ST. HELENS, WASHINGTON.
The collapse of the north face of Mount St. Helens on May 18, 1980, and the debris avalanche that resulted blocked outflow from Spirit Lake and Coldwater and South Fork Castle Creeks. Spirit Lake began to increase in size and lakes began to form in the canyons of Coldwater and South Fork Castle Creeks. Coldwater and Castle Lakes would have overtopped their respective blockages in late 1981 or earl
Authors
William Meyer, Martha A. Sabol, Robert Schuster
Alternate forms of the associated Legendre functions for use in geomagnetic modeling.
An inconvenience attending traditional use of associated Legendre functions in global modeling is that the functions are not separable with respect to the two indices (order and degree). In 1973 Merilees suggested a way to avoid the problem by showing that associated Legendre functions of order m and degree m+k can be expressed in terms of elementary functions asPmm+k(θ)=sinm(θ)∑ki=0amkicos(iθ)whe
Authors
L.R. Alldredge, E.R. Benton
Seismically induced landslides: current research by the US Geological Survey.
We have produced a regional seismic slope-stability map and a probabilistic prediction of landslide distribution from a postulated earthquake. For liquefaction-induced landslides, in situ measurements of seismically induced pore-water pressures have been used to establish an elastic model of pore pressure generation. -from Authors
Authors
E. L. Harp, R. C. Wilson, D. K. Keefer, G. F. Wieczorek
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 components
Authors
L.R. Alldredge, E.R. Benton
Comments on 'Remarks on the secular change in the energy density spectrum of the geomagnetic field' by Joachim Meyer.
Meyer has discussed only the Rn aspect of the Alldredge (1984) paper he is criticising. He has ignored the pictorial demonstration of the need for higher harmonics to properly describe the secular variation field than the main field as demonstrated. This more or less independent demonstration supports the general conclusion of that paper.
Authors
L.R. Alldredge
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1986
No abstract available.
Authors
John B. Townshend, R. V. O'Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1986
No abstract available.
Authors
John B. Townshend, H.K. Rex, L.Y. Torrence