DEPTH OF FOCUS DISCRIMINATION BY CRUSTAL PHASES FOR NTS NUCLEAR EXPLOSIONS

Abstract

Time residuals for Pg-Pn intervals as a function of epicentral distance and Sg-Pa intervals are examined for 'calibrated' source-to-recording station paths. At some stations, it is found that the residuals are reduced by about one half when true epicentral distance is used. Depths of foci for 16 nuclear explosions are estimated from Pg-Pn residuals. When the average is taken for depth estimates from three or more recording stations, the results are within 10 km of the surface. Depths computed from single stations may be as much as 30 km in error. The greatest source of error is in reading arrival times of the Pg phase with sufficient accuracy from LRSM three-component recordings.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0406082

Entities

People

  • John Denoyer

Organizations

  • Institute for Defense Analyses

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Calibration
  • Compression
  • Computer Programs
  • Computers
  • Discrimination
  • Engineering
  • Errors
  • Explosions
  • Intervals
  • New Mexico
  • Nuclear Explosions
  • Residuals
  • Secondary Waves
  • Standards
  • Time Intervals
  • Travel Time

Readers

  • Seismology