Evaluation of Seismometer Arrays for Earthquake Location
Lienert, Barry R.; Frazer, L. Neil; Rudman, Albert J.
Title:
Geophysical Computer Program 11
Keywords:
Seismic Array, Earthquake Location, Galapagos Location,Geophysical Computer Programs
Date:
1986
Publisher:
Indiana Geological Survey
Citation:
Lienert, B. R., Frazer, L. N., and Rudman, A. J., 1986, Evaluation of seismometer arrays for earthquake location: Indiana Geological Survey Occasional Paper 52, 53 p., 9 figs.
Series, #:
Occasional Paper;52
Rights:
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA.
Type:
Technical Report
Abstract:
Program HYPOERR evaluates the performance of a small network of arbitrary seismic
arrays in determining coordinates and times of seismic events. A linearized inversion
following the method of Uhrhammer (1980)is performed for a layered velocity structure
by determining the eigenvalues and eigenvectors of the partial derivatives of travel time
for P and/or S phases with respect to hypocenter position and origin time for each
station in the array. A series of covariance matrices is then obtained to evaluate statistical errors for a specified grid of hypocenter
locations at any given depth. Contour plots can then be made of the matrix elements by
using standard contouring software. Examples are given for ( 1) the case of a hypothetical quadrapartite array and (2) an actual
eight-station ocean-bottom seismometer array deployed around the 95.5° W. Galapagos propagating-rift zone.
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