HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by PERRET, W. R. Search for Related Content GeoRef GeoRef Citation

Close-in ground motion from the MILROW and CANNIKIN events

UNDERGROUND PHYSICS DIVISION SANDIA LABORATORIES, ALBUQUERQUE, NEW MEXICO 87115

Abstract

Motion of the ground induced by the CANNIKIN and MILROW nuclear explosions beneath Amchitka Island was observed at vertical arrays of subsurface stations in borings offset 90 m from the shot holes and at surface stations at distances ranging from surface zero to about 10 km. Acceleration, particle velocity, and displacement time histories were obtained: vertical components only in the vertical arrays and three orthogonal components at surface stations.

MILROW results indicate Rayleigh waves in records from a horizontal range of one-half shot depth and beyond. Analysis showed the initial spall depth near 110 m, with later spallation below 150 m and between 30 and 90 m. Surface data indicate spallation extended laterally to four times shot depth. CANNIKIN data were trucated at about 1.8 sec by power circuit malfunction. Peak motion was recorded at all but the most remote CANNIKIN station before loss of power. Comparison of CANNIKIN data with those from MILROW indicate greater peak motions from the more energetic CANNIKIN explosion, but scaled peak motions from these events are similar.

This article has been cited by other articles:

				T. LAY, D. V. HELMBERGER, and D. G. HARKRIDER Source models and yield-scaling relations for underground nuclear explosions at Amchitka Island Bulletin of the Seismological Society of America, June 1, 1984; 74(3): 843 - 862. [Abstract] [PDF]

				R. P. MASSE Review of seismic source models for underground nuclear explosions Bulletin of the Seismological Society of America, August 1, 1981; 71(4): 1249 - 1268. [Abstract] [PDF]

				D. L. SPRINGER Secondary sources of seismic waves from underground nuclear explosions Bulletin of the Seismological Society of America, June 1, 1974; 64(3-1): 581 - 594. [Abstract] [PDF]