Some Simulation Studies on Seismic Magnitude Estimators,

Abstract

Conventional seismic magnitude estimates are frequently biased because of the absence of station readings resulting from poor signal to noise ratio on the seismograms. Several magnitude estimation techniques, designed to overcome this threshold bias problem, have been published and in this report some of their properties are described using simulation experiments. The presence of bias in thejoint least squares analysis method (LSMF), where both magnitudes and station terms for seaveral sources are computed simultaneously, is also investigated. A suggested joint maximum likelihood approach provides an attractive alternative. Keywords: Seismic waves; Underground explosions; Nuclear explosions; Simulation; Least squares method; Great Britain.

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1986
Accession Number
ADA176681

Entities

People

  • R. C. Lilwall

Organizations

  • Atomic Weapons Establishment

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Estimators
  • Explosions
  • Least Squares Method
  • Mathematics
  • Nuclear Explosions
  • Optimal Estimators
  • Seismic Waves
  • Simulations
  • Statistical Algorithms
  • Underground Explosions
  • Waves

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Regression Analysis.
  • Seismology