Quantitative analysis on tectonic deformation of active rupture zones

Based on the regional GPS data of high spatial resolution, we present a method of quantitative analysis on the tectonic deformation of active rupture zones in order to predict the location of forthcoming major earthquakes. Firstly we divide the main fault area into certain deformation units, then de...

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Bibliographic Details
Published in:Earthquake science 2005-11, Vol.18 (6), p.656-665
Main Author: 江在森 牛安福 王敏 黎凯武 方颖 张希 张晓亮
Format: Article
Language:chi ; eng
Subjects:
active
deformation
Earthquakes
Global positioning systems
GPS
Plate tectonics
predi
rupture
Seismic activity
Shear strain
tectonic
zone
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Summary:Based on the regional GPS data of high spatial resolution, we present a method of quantitative analysis on the tectonic deformation of active rupture zones in order to predict the location of forthcoming major earthquakes. Firstly we divide the main fault area into certain deformation units, then derive the geometric deformation and relative dislocation parameters of each unit and finally estimate quantitatively the slip and strain rates in each segment of the rupture zone. Furthermore, by comparing the consistency of deformation in all segments of the whole rupture zone, we can determine the possible anomalous segments as well as their properties and amplitudes. In analyzing the eastern boundaries of Sichuan-Yunnan block with the GPS velocity data for the period of 1991-2001, we have discovered that the Mianning-Ningnan-Dongchuan segment on the Zemuhe-Xiaojiang fault zone is relatively locked and the left-lateral shear strain rate here is higher.[PUBLICATION ABSTRACT]
ISSN:1674-4519
1867-8777
DOI:10.1007/s11589-005-0093-x