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Crustal structure in Nevada and southern Idaho from nuclear explosions 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 (Δ) is in km. Assuming constant velocities and horizontal...
Authors
L. C. Pakiser, D.P. Hill

Fish kill from underwater explosions 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 experience, together with elimination of...
Authors
David J. Stuart

Landslide conditions along the Ferry County highway parallelling Lake Roosevelt from Kettle Falls to the mouth of the Spokane River, Washington Landslide conditions along the Ferry County highway parallelling Lake Roosevelt from Kettle Falls to the mouth of the Spokane River, Washington

As part of the program of the U.S. Geological Survey, landslides are being studied in several localities in the United States. These studies are directed toward assembling criteria for recognition of landslides, classification, and cataloging of remedial or control methods that have been effective. In the gorge of the Columbia Ricer in Washington, landslides of large magnitude have been...
Authors
Fred O. Jones

The landslide of Sainte-Adresse cliff The landslide of Sainte-Adresse cliff

The Sainte-Adresse Cliff in the neighborhood of Le Havre was subject in the past to repeated movements of greater of lesser scope which in 1944 have become markedly accentuated because of works on the "Atlantic Wall" and bomb and mine explosions. The situation became dangerous and required a complete study including geological and geotechnical surveys with borings and search of slip...
Authors
M. M. Buisson, Severine Britt

Landslides in shale at Rapid City, South Dakota Landslides in shale at Rapid City, South Dakota

In the past 5 years several landslides have originated in hillsides at Rapid City, South Dakota, with resulting damage both to city streets and to private dwellings. The present investigation is a contribution to the continuing study of landslides by the U. S. Geological Survey, although a formal project of landslide investigation in Rapid City has not been established.
Authors
Dwight R. Crandell
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