Publications
Filter Total Items: 7494
Investigating Climate Change of Western North America Investigating Climate Change of Western North America
No abstract available.
Authors
James V. Geological Survey Gardner
Proposal for worldwide landslide hazard maps Proposal for worldwide landslide hazard maps
No abstract available.
Authors
E. E. Brabb
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Geology and human activity in the Florida Keys Geology and human activity in the Florida Keys
No abstract available.
Authors
Eugene A. Shinn
Lake Baikal - A touchstone for global change and rift studies Lake Baikal - A touchstone for global change and rift studies
No abstract available.
Authors
Deborah R. Hutchinson, Steve M. Colman
Seismic evidence for active magmatic underplating beneath the Basin and Range Province, western United States Seismic evidence for active magmatic underplating beneath the Basin and Range Province, western United States
Near-vertical and wide-angle seismic reflection data provide evidence for the presence of a magma body at the base of the crust beneath Buena Vista Valley in northwestern Nevada. The seismic response of this hypothesized magma body is characterized by high-amplitude, near-vertical P wave reflections and a comparably strong P-to-S converted phase. The magma body, referred to here as the...
Authors
Craig M. Jarchow, George A. Thompson, Rufus D. Catchings, Walter D. Mooney
Deformation from 1973 to 1987 in the epicentral area of the 1959 Hebgen Lake, Montana, earthquake (Ms = 7.5) Deformation from 1973 to 1987 in the epicentral area of the 1959 Hebgen Lake, Montana, earthquake (Ms = 7.5)
A 40‐km aperture trilateration network centered on the 1959 Hebgen Lake earthquake epicenter has been surveyed in 1973, 1974, 1976, 1978, 1981, 1984, and 1987. The deformation inferred from those surveys is described roughly by a uniaxial, 0.266 ± 0.014 μstrain/yr, N15°E ± 1°extension that is uniform in both time and space. That extension is orthogonal to the strike (N78°W ± 5°) of the...
Authors
James C. Savage, Michael Lisowski, W.H. Prescott, A.D. Pitt
Deformation from 1973 through 1991 in the epicentral area of the 1992 Landers, California, Earthquake (Ms = 7.5) Deformation from 1973 through 1991 in the epicentral area of the 1992 Landers, California, Earthquake (Ms = 7.5)
Deformation of a 50 × 60 km trilateration network that spans the epicenter of the 1992 Landers earthquake(Ms = 7.5) was measured by seven surveys over the 19 years preceding the earthquake. Three moderate earthquakes (1979 Homestead Valley, Ms = 5.6; 1986 North Palm Springs, Ms = 6.0; and 1992 Joshua Tree, Ms = 6.1) occurred within the network during those 19 years. Here we use geodetic...
Authors
James C. Savage, Michael Lisowski, M. Murray
On the estimation of site-dependent response spectra On the estimation of site-dependent response spectra
No abstract available.
Authors
Roger D. Borcherdt
Klamath Falls earthquakes, September 20, 1993 — Including the strongest quake ever measured in Oregon Klamath Falls earthquakes, September 20, 1993 — Including the strongest quake ever measured in Oregon
Earthquakes struck the Klamath Falls area on Monday night, September 20, 1993, resulting in two deaths and extensive damage. The quakes were felt as far away as Coos Bay to the west, Eugene to the north, Lakeview to the east, and Chico, California, to the south. A foreshock recorded at 8:16 p.m. had a Richter magnitude of 3.9. The first of two main shocks, measuring 5.9 on the Richter...
Authors
T. J. Wiley, David R. Sherrod, David K. Keefer, Anthony Qamar, Robert L. Schuster, James W. Dewey, Matthew A. Mabey, Gerald L. Black, Ray E. Wells
Galileo observations of Post-Imbrium lunar craters during the first Earth-Moon flyby Galileo observations of Post-Imbrium lunar craters during the first Earth-Moon flyby
Copernican‐age craters are among the most conspicuous features seen on the far side and western limb of the Moon in the Galileo multispectral images acquired in December 1990. Among the new morphologic observations of far‐side craters are bright rays, continuous ejecta deposits, and dark rings associated with probable impact‐melt veneers. These observations suggest that the mapped age...
Authors
Alfred S. McEwen, Lisa R. Gaddis, Gerhard Neukum, Harald Hoffman, Carle M. Pieters, James W. Head
Site response estimates in Salt Lake Valley, Utah, from borehole seismic velocities Site response estimates in Salt Lake Valley, Utah, from borehole seismic velocities
The general correlation of Salt Lake Valley sites located on soft, saturated unconsolidated silty and clayey deposits (that is, deposits with low S-wave velocity) with high seismic amplification at the ground surface motivated our investigation of the relationship between the P- and S-wave seismic velocity (Vp and Vs) of these units and their corresponding observed site response. We...
Authors
R. A. Williams, K. W. King, John Tinsley
Landslides triggered by the storm of November 3-5, 1985, Wills Mountain Anticline, West Virginia and Virginia Landslides triggered by the storm of November 3-5, 1985, Wills Mountain Anticline, West Virginia and Virginia
More than 3,000 landslides were triggered by heavy rainfall in the central Appalachian Mountains of West Virginia and Virginia, November 3-5, 1985. These landslides provided the opportunity to study spatial controls on landslides, magnitude and frequency of triggering events, and the effects of landslides on flood-induced geomorphic change. The study area consists of parts of the Wills...
Authors
Robert B. Jacobson, John P. McGeehin, Elizabeth D. Cron, Carolyn E. Carr, John M. Harper, Alan D. Howard