Publications
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Antarctica: Measuring glacier velocity from satellite images 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...
Authors
Baerbel K. Lucchitta, H.M. Ferguson
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
LANDSLIDE DAMMED LAKES AT MOUNT ST. HELENS, WASHINGTON. 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...
Authors
William Meyer, Martha A. Sabol, Robert Schuster
Alternate forms of the associated Legendre functions for use in geomagnetic modeling. 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 as Pmm+k(θ)=sinm(θ)∑ki...
Authors
L.R. Alldredge, E.R. Benton
Seismically induced landslides: current research by the US Geological Survey. 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. 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
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1986 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: September 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: September 1986
No abstract available.
Authors
John B. Townshend, 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
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: August 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: August 1986
No abstract available.
Authors
John B. Townshend, J.E. Papp, H.K. Rex, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1986
No abstract available.
Authors
John B. Townshend, J.E. Papp, H.K. Rex, L.Y. Torrence
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