Publications
Educational Publications
Educational Publications
Selected publications about earthquakes In plain language.
Filter Total Items: 2785
A seismic refraction survey of the Imperial Valley Region, California A seismic refraction survey of the Imperial Valley Region, California
The U.S. Geological Survey conducted an extensive seismic refraction survey in the Imperial Valley region of California in 1979. The Imperial Valley is located in the Salton Trough, an active rift between the Pacific and North American plates. Forty shots fired at seven shot points were recorded by 100 portable seismic instruments at typical spacing of 0.5–1 km. More than 1300 recording...
Authors
Gary S. Fuis, Walter D. Mooney, J. H. Healy, G. A. McMechan, W. J. Lutter
Introduction and digest to the Special Issue on Chemical Effects of Water on the Deformation and Strengths of Rocks Introduction and digest to the Special Issue on Chemical Effects of Water on the Deformation and Strengths of Rocks
The important role of pore pressure in promoting such brittle processes as cataclasis, hydraulic fracturing, large‐scale faulting, and earthquakes within the crust is widely accepted in geology and geophysics [, 1957; , 1959; , 1958; ., 1963; , 1968; ., 1968; ., 1976; , 1973, 1980; , 1981]. Provided that fluid pressure is fully communicated with rock pore space, the effective normal...
Authors
Stephen H. Kirby
Experimental deformation of topaz crystals: Possible embrittlement by intracrystalline water Experimental deformation of topaz crystals: Possible embrittlement by intracrystalline water
Crystallographically oriented single‐crystal prisms of gem quality topaz (composition AlSiO (OH− F) where x = 0.04 ± 0.01) were deformed at a confining pressure of 1.50 GPa, a temperature of 800°C, and a strain rate of 2×10 s. Under nearly identical conditions, all crystals of anhydrous rock‐forming minerals that have been tested to date, such as olivine, quartz, feldspars, pyroxenes...
Authors
R. W. Lee, Stephen H. Kirby
Effects of compression direction on the plasticity and rheology of hydrolytically weakened synthetic quartz crystals at atmospheric pressure Effects of compression direction on the plasticity and rheology of hydrolytically weakened synthetic quartz crystals at atmospheric pressure
A hydrothermally grown synthetic quartz crystal with 370±60 ppm hydroxyl impurity was cut into right rectangular prisms in eight crystallographic orientations. We compressed the prisms under constant axial force corresponding to a uniaxial stress of 140.0±0.5 MPa, and temperatures of 510° and 750°C. All but one of the samples sustained permanent axial strains of 2–3%. We established the...
Authors
Mark F. Linker, Stephen H. Kirby, A. Ord, J.M. Christie
National planning considerations for the acquisition of strong ground-motion data National planning considerations for the acquisition of strong ground-motion data
No abstract available.
Authors
Roger D. Borcherdt
Summary geologic report for petroleum lease sale #100, Kodiak Shelf, Alaska Summary geologic report for petroleum lease sale #100, Kodiak Shelf, Alaska
No abstract available.
Authors
M. A. Fisher, Roland E. von Huene, M. A. Hampton
Proceedings of the 1980 workshop of the International Association of Seismology and Physics of the Earth's Interior on the seismic modeling of laterally varying structures: Contributions based on data from the 1978 Saudi Arabian refraction profile Proceedings of the 1980 workshop of the International Association of Seismology and Physics of the Earth's Interior on the seismic modeling of laterally varying structures: Contributions based on data from the 1978 Saudi Arabian refraction profile
No abstract available.
Authors
Walter D. Mooney, Claus Prodehl
Noise analysis of the seismic system employed in the northern and southern California seismic nets Noise analysis of the seismic system employed in the northern and southern California seismic nets
The seismic networks have been designed and operated to support recording on Develocorders (less than 40db dynamic range) and analog magnetic tape (about 50 db dynamic range). The principal analysis of the records has been based on Develocorder films; and background earth noise levels have been adjusted to be about 1 to 2 mm p-p on the film readers. Since the traces are separated by only...
Authors
J. P. Eaton
Preliminary geologic map of the Colville Indian Reservation, Ferry and Okanogan Counties, Washington, with a table of potassium-argon ages Preliminary geologic map of the Colville Indian Reservation, Ferry and Okanogan Counties, Washington, with a table of potassium-argon ages
No abstract available.
Authors
Brian F. Atwater, Robert J. Fleck
Data from the GEOS digital recorder Data from the GEOS digital recorder
No abstract available.
Authors
J. B. Fletcher, Roger D. Borcherdt, C. Mueller, E. Cranswick
A general earthquake observation system (GEOS) A general earthquake observation system (GEOS)
No abstract available.
Authors
Roger D. Borcherdt, Edward G. Jensen, G. Maxwell, J. B. Fletcher, R. McClearn, John R. Van Schaack, R. E. Warrick
Strain‐rate profile across the Elsinore, San Jacinto, and San Andreas Faults near Palm Springs, California, 1973‐81 Strain‐rate profile across the Elsinore, San Jacinto, and San Andreas Faults near Palm Springs, California, 1973‐81
A profile of the strain accumulation rate along a line trending N50°E across the subparallel Elsinore, San Jacinto, and San Andreas faults near Palm Springs, California, has been constructed from trilateration surveys in the 1973‐81 interval. The strain accumulation is principally right‐lateral shear across a vertical plane parallel to fault strike (N40°W). The strain rate profile for...
Authors
N.E. King, James C. Savage