Determination of mislocation vectors to evaluate bias at GSETT-3 primary stations

Using the database provided by the Reviewed Event Bulletins (REBs) for the first 2.5 years of the Group of Scientific Experts Technical Test-3 (GSETT-3) experiment, we compiled mislocation vectors for both arrays and selected three-component stations of the primary network from the published slownes...

Full description

Saved in:
Bibliographic Details
Published in:Journal of seismology 1999-04, Vol.3 (2), p.139-151
Main Authors: KOCH, K, KRADOLFER, U
Format: Article
Language:English
Subjects:
Arrays
Bias
Earth sciences
Earth, ocean, space
Earthquakes, seismology
Exact sciences and technology
Inspection
Internal geophysics
Mathematical analysis
Nuclear tests
Phases
Position (location)
Seismology
Stations
Vectors (mathematics)
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using the database provided by the Reviewed Event Bulletins (REBs) for the first 2.5 years of the Group of Scientific Experts Technical Test-3 (GSETT-3) experiment, we compiled mislocation vectors for both arrays and selected three-component stations of the primary network from the published slowness and azimuth information gained through f-k- and polarization analysis. Imposing constraints such as a minimum signal-to-noise ratio (SNR) and number of defining phases, we aim at eliminating location bias as the hypocentral parameters are taken from the REBs. Results from 14 arrays with apertures from about 1 km to more than 20 km are presented as well as from 18 three-component stations, which indicate that the mislocation vectors in many cases can improve location accuracy considerably. If these mislocation vectors are compiled to provide coverage of a sufficient portion of the slowness domain these empirical corrections can easily be applied prior to location processing. In the context of the Comprehensive Nuclear Test-Ban Treaty (CTBT), these mislocation patterns could be essential for providing accurate event location of suspicious low-magnitude events, as these location parameters will be used to pinpoint the area where to conduct an on-site inspection.[PUBLICATION ABSTRACT]
ISSN:1383-4649
1573-157X
DOI:10.1023/A:1009823825899