Earthquake Hazards

Publications

Filter Total Items: 1,475
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Year Published: 1963

Crustal structure from San Francisco, California, to Eureka, Nevada, from seismic-refraction measurements

Seismic-refraction measurements from chemical explosions near San Francisco, California, and Fallon and Eureka, Nevada, were made along a line extending nearly 700 km inland from San Francisco across the Coast Ranges, Great Valley, Sierra Nevada, and Basin and Range Province. The velocity of Pg in the Basin and Range Province was found to be 6.0...

Eaton, Jerry P.
Crustal structure from San Francisco, California, to Eureka, Nevada, from seismic-refraction measurements; 1963; USGS Unnumbered Series; 11; Eaton, Jerry P.

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Year Published: 1963

Traveltimes and amplitudes from nuclear explosions; Nevada Test Site to Ordway, Colorado

This paper treats the results of a study of seismic waves generated by eight nuclear explosions and recorded at 31 locations between the Nevada Test Site (NTS) and Ordway, Colorado. The line of recording stations crosses the eastern part of the Basin and Range Province, the Colorado Plateau, the southern Rocky Mountains, and extends into the Great...

Ryall, Alan; Stuart, David J.
Traveltimes and amplitudes from nuclear explosions; Nevada Test Site to Ordway, Colorado; 1963; USGS Unnumbered Series; 10; Ryall, Alan ; Stuart, David J.

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Year Published: 1963

Crustal structure in the western United States; study of seismic propagation paths and regional traveltimes in the California-Nevada region

The U.S. Geological Survey, with the assistance of United ElectroDynamics, Inc., completed ten weeks of seismic-refraction field work during the summer of 1962 in the southwestern part of the United States. This work was a continuation of a program initiated in 1961 to study traveltimes and seismic propagation paths in the earth?s crust and upper...

Roller, J.C.; Jackson, W.H.; Cooper, J.F.; Martina, B.A.
Crustal structure in the western United States; study of seismic propagation paths and regional traveltimes in the California-Nevada region; 1963; USGS Unnumbered Series; 9; Roller, J. C.; Jackson, W. H.; Cooper, J. F.; Martina, B. A.

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Year Published: 1963

Structure of the crust and upper mantle in the western United States

Seismic waves generated by underground nuclear and chemical explosions have been recorded in a network of nearly 2,000 stations in the western conterminous United States as a part of the VELA UNIFORM program. The network extends from eastern Colorado to the California coastline and from central Idaho to the border of the United States and Mexico....

Pakiser, L.C.
Structure of the crust and upper mantle in the western United States; 1963; USGS Unnumbered Series; 8; Pakiser, L. C.

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Year Published: 1963

Preliminary report on seismic-reflection studies of crustal structure in the western, central, and southern United States

During 1963 the U.S. Geological Survey, with the assistance of United ElectroDynamics, Inc., recorded five separate reversed seismic profiles. In addition to these profiles, the U.S. Geological Survey participated in a seismic-calibration program for the DRIBBLE experiment at Tatum Dome, Mississippi, a 20,000-pound shot near Dexter, Missouri, and...

Roller, J.C.; Strozier, O.P.; Jackson, W.H.; Healy, J.H.
Preliminary report on seismic-reflection studies of crustal structure in the western, central, and southern United States; 1963; USGS Unnumbered Series; 14; Roller, J.C.; Strozier, O.P.; Jackson, W.H.; Healy, J.H.

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Year Published: 1963

A progress report on seismic model studies

The value of seismic-model studies as an aid to understanding wave propagation in the Earth's crust was recognized by early investigators (Tatel and Tuve, 1955). Preliminary model results were very promising, but progress in model seismology has been restricted by two problems: (1) difficulties in the development of models with continuously...

Healy, J.H.; Mangan, G.B.
A progress report on seismic model studies; 1963; USGS Unnumbered Series; 15; Healy, J.H.; Mangan, G.B.,

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Year Published: 1962

Crustal structure in Nevada and southern Idaho from nuclear explosions

The time of first arrival of seismic waves generated by 4 underground nuclear explosions at the Nevada Test Site (NTS) and recorded along a line extending north into southern Idaho is expressed as T0 = 0. 00 + Δ/3.0 (assumed), T1 = 0 .40 + Δ/6.03, and T2 = 6.15 + Δ/7.84, where time is in seconds and the shot-detector distance (...

Pakiser, L.C.; Hill, D.P.
Crustal structure in Nevada and southern Idaho from nuclear explosions; 1962; USGS Unnumbered Series; 4; Pakiser, L.C. ; Hill, D.P.

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Year Published: 1962

Digital processing of array seismic recordings

This technical letter contains a brief review of the operations which are involved in digital processing of array seismic recordings by the methods of velocity filtering, summation, cross-multiplication and integration, and by combinations of these operations (the "UK Method" and multiple correlation). Examples are presented of analyses by the...

Ryall, Alan; Birtill, John
Digital processing of array seismic recordings; 1962; USGS Unnumbered Series; 2; Ryall, Alan; Birtill, John

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Year Published: 1962

Times and locations of explosions; U.S. Geological Survey 1962 field season

The U.S. Geological Survey detonated 86 large charges of chemical explosives in the western United States from 6 June to 9 August 1962, in a study of crustal structure in the western United States. This Technical Letter consists of two tables containing information about these explosions. Table I gives a brief geographical description of the...

Roller, John C.
Times and locations of explosions; U.S. Geological Survey 1962 field season; 1962; USGS Unnumbered Series; 3; Roller, John C.

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Year Published: 1962

Crustal structure along the coast of California from seismic-refraction measurements

Two reversed seismic-refraction profiles were recorded between Los Angeles and San Francisco in 1961. The three shotpoints were located in Santa Monica Bay, offshore near San Francisco, and at Camp Roberts, about halfway between Los Angeles and San Francisco. The velocity of Pg along these profiles is 6.1 ± 0.1 km/sec, with possible...

Healy, J.H.
Crustal structure along the coast of California from seismic-refraction measurements; 1962; USGS Unnumbered Series; 5; Healy, J. H.

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Year Published: 1962

Fish kill from underwater explosions

The U.S. Geological Survey has used 23 different shotpoints during two seasons of field work in our seismic study of crustal structure in western United States. Without exception, it has been found that under-water shotpoints result in a more efficient conversion of explosive energy into seismic energy than do drilled-hole shotpoints. This...

Stuart, David J.
Fish kill from underwater explosions; 1962; USGS Unnumbered Series; 6; Stuart, David J.