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Title: Report on flood emergency : Madison River Slide : Madison River, Montana, Volume I : Main Report
Authors: United States. Army. Corps of Engineers. Garrison District.
Keywords: Earthquakes--Montana
Publisher: United States. Army. Corps of Engineers. Omaha District.
Abstract: On 17 August 1959, at about 11:38 p.m., one of the most severe earthquakes in the history of the United States struck the Rocky Mountain region in the vicinity of Yellowstone National Park. The shock was recorded st the University of California Seismological Station at Berkeley, California, with a magnitude of 7.5 to 7.75 on the Richter scale. Several aftershocks, ranging in magnitude from 5.5 to 6.75 on the Richter scale, were recorded at Berkeley in the next 24 hours. Many more shocks and tremors of lesser and decreasing magnitude were felt in the area for weeks afterward. The epicenter was estimated to be in the southwestern part of Yellowstone National Park. Damage was particularly heavy in the upper Madison River valley in Montana. Nine lives are known to have been lost and nineteen other persons known or thought to have been in the area have not been accounted for, and are presumed to have perished under the slide at the mouth of the Madison Canyon. This report covers the activities of the Corps of Engineers, under the authority of Public Law 99, 84th Congress, 1st Session, in appraising the situation and in removing the hazard to life and the threat of flood damage caused by the earthquake.
Description: Technical Report
Rights: Approved for Public Release; Distribution is Unlimited
Size: 80 pages/39.87 Mb
Appears in Collections:Technical Reports

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