Reducing Systematic Errors for Seismic Event Locations Using a Model Incorporating Anisotropic Regional Structures

Abstract

We have utilized a mapping of the lateral and anisotropic variations in Pn velocities beneath continents across the globe (Smith & Ekstrom, 1999) to predict travel times of P-wave propagation at distances of 2 - 14 degrees. At such distances, the phase Pn is in the seismic phase that is most frequently reported and that thus controls the location accuracy. This is important in CTBT applications as many events of interest are only detected at these distances. We have thus worked on reducing the systematic errors in Pn travel-times and the resulting seismic event location at regional distances using our mapping.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2006
Accession Number
ADA456301

Entities

People

  • Douglas A. Wiens
  • Gideon P. Smith

Organizations

  • Washington University in St. Louis

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Continents
  • Contracts
  • Data Sets
  • Department Of Defense
  • Earth Models
  • Earthquakes
  • Errors
  • Geographic Regions
  • Models
  • Nuclear Explosions
  • Statistical Analysis
  • Three Dimensional
  • Travel Time
  • United States
  • Waves

Readers

  • Seismology
  • Systems Analysis and Design