Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; July 1960; v. 50; no. 3; p. 455-459
© 1960 Seismological Society of America
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Maximum vertical ground displacement of seismic waves generated by explosive blasts

DAVID E. WILLIS and JAMES T. WILSON

WILLOW RUN LABORATORIES, THE UNIVERSITY OF MICHIGAN
DEPARTMENT OF GEOLOGY, THE UNIVERSITY OF MICHIGAN

Abstract

An approximate first-power relationship was found between the maximum vertical component of ground displacement and the charge size from a number of quarry shots. The maximum vertical ground displacement, normalized to the Rainier (1.7 kt.) underground nuclear shot, is presented for a series of explosive shots ranging in size from 1 ton 19 kilotons and at distances of 1 to nearly 1,000 kilometers. The following empirical equations were found to fit the observed data:

Formula
where A is the maximum vertical component of ground displacement in centimeters and R is the distance in kilometers.




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