Hide-in-Earthquake Countermeasures using Earthquake P Shadow Zone and Explosion PKP Caustic Zone

Established distance-amplitude curves are used to illustrate the feasibility of a method to detect the presence of a seismic phase from an underground explosion in the coda of an earthquake. The advantage of the technique arises from the fact that the amplitude of an earthquake coda is reduced on re...

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Bibliographic Details
Main Authors: Blandford, R R, Sweetser, E I, Cohen, T J
Other Authors: TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA ANALYSIS CENTER
Format: Text
Language:English
Published: 1975
Subjects:
Seismology
Seismic Detection and Detectors
*EARTHQUAKES
*SEISMIC DETECTION
*UNDERGROUND EXPLOSIONS
CAUSTICS
COUNTERMEASURES
DISCRIMINATION
EARTH CORE
EVASION
KAMCHATKA PENINSULA
LONG RANGE(DISTANCE)
NEVADA
NUCLEAR EXPLOSIONS
SEISMIC ARRAYS
SEISMIC SIGNATURES
SEISMIC WAVES
SEISMOLOGICAL STATIONS
SHADOWS
SITE SELECTION
USSR
WAVE PROPAGATION
Aftershocks
Nuclear explosion detection
Kurile Islands
Hide in earthquake
HIE(Hide in earthquake)
Earthquake coda
Kamchatka Peninsula
Kamchatka
Online Access:http://www.dtic.mil/docs/citations/ADA027881
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA027881
Description
Summary:Established distance-amplitude curves are used to illustrate the feasibility of a method to detect the presence of a seismic phase from an underground explosion in the coda of an earthquake. The advantage of the technique arises from the fact that the amplitude of an earthquake coda is reduced on recordings taken in the core shadow zone while the amplitude of PKP from an explosion is enhanced in its caustic zone. Results of the study indicate that the method can be effective even if the explosion and earthquake are located only two to five degrees apart.

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