Publications
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Magnetic fields over active tectonic zones in ocean
The aim of our work is to estimate the electromagnetic effects that can be detected in the submarine zones with hydrothermal activity. It is known that meso-scale flows appear in the regions over underwater volcanoes or hot rocks. Their origin is connected with heat flux and hot jets released from underwater volcanoes or faults in a sea bottom. Values of mean velocities and turbulent velocities in
Authors
Yu. A. Kopytenko, P.M. Serebrianaya, L.V. Nikitina, A.W. Green
Seismological evidence for a sub-volcanic arc mantle wedge beneath the Denali volcanic gap, Alaska
Arc volcanism in Alaska is strongly correlated with the 100 km depth contour of the western Aluetian Wadati-Benioff zone. Above the eastern portion of the Wadati-Benioff zone however, there is a distinct lack of volcanism (the Denali volcanic gap). We observe high Poisson's ratio values (0.29-0.33) over the entire length of the Alaskan subduction zone mantle wedge based on regional variations of P
Authors
D.E. McNamara, M.E. Pasyanos
Instrumental intensity distribution for the Hector Mine, California, and the Chi-Chi, Taiwan, earthquakes: Comparison of two methods
We compare two methods of seismic-intensity estimation from ground-motion records for the two recent strong earthquakes: the 1999 (M 7.1) Hector Mine, California, and the 1999 (M 7.6) Chi-Chi, Taiwan. The first technique utilizes the peak ground acceleration (PGA) and velocity (PGV), and it is used for rapid generation of the instrumental intensity map in California. The other method is based on t
Authors
V. Sokolov, D. J. Wald
Geomorphic studies of landslides in the Tully Valley, New York: Implications for public policy and planning
On April 27, 1993, a large landslide in the Tully Valley, Onondaga County, NY, destroyed three houses and resulted in the evacuation of four others; it also triggered a loss of potable drinking water for about 15 homes north of the slide area and affected a total of 20 ha of land. In the 7 years following this slide, several studies have been conducted by federal and state environmental agencies a
Authors
D. L. Pair, W. M. Kappel
Comparing landslide inventories: The map depends on the method
Landslide inventory maps are generally prepared by interpreting the geomorphic expression of landsliding on aerial photos, topographic maps, or on the ground. Distinctive landslide geomorphology allows the recognition and mapping of landslides, although there are always landslides that have very subtle expression and are not identified. The difficulties of mapping landslides based on their geomorp
Authors
C.J. Wills, T.P. McCrink
Revised ages for tuffs of the Yellowstone Plateau volcanic field: Assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event
40Ar/39Ar ages were determined on the three major ash-flow tuffs of the Yellowstone Plateau volcanic field in the region of Yellowstone National Park in order to improve the precision of previously determined ages. Total-fusion and incremental- heating ages of sanidine yielded the following mean ages: Huckleberry Ridge Tuff—2.059 ± 0.004 Ma; Mesa Falls Tuff— 1.285 ± 0.004 Ma; and Lava Creek Tuff—
Authors
M. A. Lanphere, D. E. Champion, R. L. Christiansen, G. A. Izett, J.D. Obradovich
Shallow seismic imaging of folds above the Puente Hills blind-thrust fault, Los Angeles, California
High-resolution seismic reflection profiles image discrete folds in the shallow subsurface (<600 m) above two segments of the Puente Hills blind-thrust fault system, Los Angeles basin, California. The profiles demonstrate late Quaternary activity at the fault tip, precisely locate the axial surfaces of folds within the upper 100 m, and constrain the geometry and kinematics of recent folding. The S
Authors
Thomas L. Pratt, John H. Shaw, James F. Dolan, Shari A. Christofferson, Robert Williams, Jack K. Odum, Andreas Plesch
Stability assessment of a Hurricane Mitch-induced landslide dam on the Rio La Lima, Sierra de Las Minas, eastern Guatemala
No abstract available.
Authors
Robert L. Schuster, Robert C. Bucknam, Manuel Antonio Mota
Socioeconomic and environmental impacts of landslides in the Western Hemisphere
In spite of improvements in recognition, prediction, mitigative measures, and warning systems, economic losses and casualties due to landslides in the Western Hemisphere appear to be growing as a result of increasing development of landslide-prone areas due to population pressures. This paper notes outstanding examples of socioeconomic losses in the Americas.
Landslides impact the following ele
Authors
Robert L. Schuster, Lynn M. Highland
Observations and recommendations regarding landslide hazards related to the January 13, 2001 M-7.6 El Salvador earthquake
The January 13, 2001 earthquake (M-7.6) off the coast of El Salvador triggered widespread damaging landslides in many parts of the El Salvador. In the aftermath of the earthquake, the Salvadoran government requested technical assistance through the U.S. Agency for International Development (USAID); USAID, in turn, requested help from technical experts in landslide hazards from the U.S. Geological
Authors
Randall W. Jibson, Anthony J. Crone
Flash-flood related hazards: landslides, with examples from the December 1999 disaster in Venezuela Chapter 24
No abstract available.
Authors
Matthew C. Larsen, Maria Teresa Vasquez-Conde, R.A. Clark
Assessment of landslide hazards resulting from the February 13, 2001, El Salvador earthquake; a report to the government of El Salvador and the U. S. Agency for International Development
On February 13, 2001, a
magnitude 6.5 earthquake
occurred about 40 km eastsoutheast
of the capital city of San
Salvador in central El Salvador and
triggered thousands of landslides in
the area east of Lago de Ilopango.
The landslides are concentrated in a
2,500-km2 area and are particularly
abundant in areas underlain by
thick deposits of poorly consolidated,
late Pleistocene and Holoce
Authors
Rex L. Baum, Anthony J. Crone, Demetreo Escobar, Edwin L. Harp, Jon J. Major, Mauricio Martinez, Carlos Pullinger, Mark E. Smith