Analysis on the master event method and precise location of 1997 Jiashi strong earthquake swarm in western China

Master event location method was described in detail in this paper. Some problems in the application of master event method have been analyzed and some improvements of the method have been made. As compared the location results of M ^sub S^≥3.0 earthquakes of Jiashi swarm obtained by using this meth...

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Bibliographic Details
Published in:Acta seismologica sinica 1999-05, Vol.12 (3), p.285-291
Main Authors: Zhou, Shi-Yong, Xu, Zhong-Huai, Han, Jing, Xu, Hong-Xin, Nuernisha
Format: Article
Language:English
Subjects:
Alignment
Earthquakes
Plate tectonics
Position (location)
Relocation
Seismic activity
Seismic engineering
Seismic phenomena
Seismology
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Summary:Master event location method was described in detail in this paper. Some problems in the application of master event method have been analyzed and some improvements of the method have been made. As compared the location results of M ^sub S^≥3.0 earthquakes of Jiashi swarm obtained by using this method with that by the traditional absolute method, the result obtained by using the master event method shows more reasonable and more consistent with that from the focal mechanism solutions. After relocation, we can see, the epicenters of M≥5.0 earthquakes show an echelon-type alignment along NNW-SSE direction, and all earthquakes concentrate nearly in a volume region about 30 km (N-S)×15 km (E-W)×15 km (U-D). Earthquake focal depths are mainly in the range of 15-28 km.[PUBLICATION ABSTRACT]
ISSN:1000-9116
1674-4519
1993-1344
1867-8777
DOI:10.1007/s11589-999-0037-y