Fault Slip Rates and Seismic Moment Deficits on Major Active Faults in Middle and South Parts of the Eastern Margin of the Tibetan Plateau

As the pathway for southeastward extrusion of the Tibetan Plateau, the middle and south parts of the eastern margin of the Tibetan Plateau are characterized by widespread active faults, and intensive and frequent seismic activity. In this paper, we use the spherical linear block theory constrained b...

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Bibliographic Details
Published in:Chinese journal of geophysics 2014-03, Vol.57 (2), p.177-194
Main Authors: Yu-Hang, LI, Ming, HAO, Ling-Yun, JI, Shan-Lan, QIN
Format: Article
Language:English
Subjects:
Blocking
Earthquakes
Fault lines
Fault slip rate
Faults
Geological faults
Geophysics
Global Positioning System
Global positioning systems
GPS
Historic
Mid and south part of the eastern margin of Tibetan Plateau
Seismic hazard
Seismic moment deficit
Slip
Spherical linear block theory
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Summary:As the pathway for southeastward extrusion of the Tibetan Plateau, the middle and south parts of the eastern margin of the Tibetan Plateau are characterized by widespread active faults, and intensive and frequent seismic activity. In this paper, we use the spherical linear block theory constrained by geodetic observations from Global Positioning System (GPS) stations to estimate fault slip rates of active faults in this area. A 3D geometric block model is established based on previous relevant studies of active blocks. Using these received slip rates and optimal locking depths of faults, the rates of moment accumulation on the major faults are estimated. And then we compare them with the seismic moment released on each fault using the historical earthquake catalog. The results show that there are six faults or fault segments with large moment deficits in the research area, which would be helpful for research of middle‐long term earthquake hazard.
ISSN:0898-9591
2326-0440
DOI:10.1002/cjg2.20095