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

Abstract

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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Document Details

Document Type
Technical Report
Publication Date
Sep 25, 1975
Accession Number
ADA027881

Entities

People

  • E. I. Sweetser
  • R. R. Blandford
  • T. J. Cohen

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Antarctica
  • Argentina
  • Australia
  • California
  • Caspian Sea
  • Central America
  • Computer Programs
  • Continents
  • Countermeasures
  • Detection
  • Frequency
  • Nuclear Energy
  • Schematic Diagrams
  • Seismic Waves
  • South America
  • United States
  • Waves

Fields of Study

  • Environmental science

Readers

  • Seismology
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.