Improved Location with Regional Events

Abstract

Three methods of locating events with regional phases were tested and compared for accuracy of hypocenter determination. A modified HYLO method was found to be slightly less accurate than a standard location algorithm using a Herrin 68 earth model. In addition, we found that the modified HYLO method requires a much more detailed knowledge of the earth's crust and upper mantle than is generally available. Two methods which do not require any previous knowledge of the crust in the area of interest, the methods of successive determinations and simultaneous inversions, were found to reduce location errors about 50%, as compared to the standard location algorithm with a Herrin 68 earth model.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1980
Accession Number
ADA105486

Entities

People

  • A. C. Chang
  • D. W. Rivers
  • J. A. Burnetti

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Computer Programs
  • Data Analysis
  • Databases
  • Earth Models
  • Errors
  • Grids
  • Inversion
  • Models
  • Mohorovicic Discontinuity
  • North America
  • Nuclear Explosions
  • Physical Properties
  • Standards
  • Travel Time
  • United States

Readers

  • Approximation Theory.
  • Seismology