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Bayesian historical earthquake relocation: an example from the 1909 Taipei earthquake

Geophysical Journal International

By:
,
DOI: 10.1093/gji/ggu201

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Abstract

Locating earthquakes from the beginning of the modern instrumental period is complicated by the fact that there are few good-quality seismograms and what traveltimes do exist may be corrupted by both large phase-pick errors and clock errors. Here, we outline a Bayesian approach to simultaneous inference of not only the hypocentre location but also the clock errors at each station and the origin time of the earthquake. This methodology improves the solution for the source location and also provides an uncertainty analysis on all of the parameters included in the inversion. As an example, we applied this Bayesian approach to the well-studied 1909 Mw 7 Taipei earthquake. While our epicentre location and origin time for the 1909 Taipei earthquake are consistent with earlier studies, our focal depth is significantly shallower suggesting a higher seismic hazard to the populous Taipei metropolitan area than previously supposed.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Bayesian historical earthquake relocation: an example from the 1909 Taipei earthquake
Series title:
Geophysical Journal International
DOI:
10.1093/gji/ggu201
Volume
198
Issue:
3
Year Published:
2014
Language:
English
Publisher:
Oxford University Press
Publisher location:
Oxford, United Kingdom
Contributing office(s):
Earthquake Science Center
Description:
12 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1419
Last page:
1430
Number of Pages:
12
Country:
Taiwan
City:
Taipei