The space and time distribution characteristics of the shear stress field for the sequence of the Wuding earthquake

Follow Chen and Duda's model of spectral fall-off of ω^sup 3^, the dependence of peak parameters of ground motion, peak displacement d ^sub m^, peak velocity v ^sub m^ and peak acceleration a ^sub m^, upon the environment stress τ ^sub 0^-values are studied using near source seismic digital rec...

Full description

Saved in:
Bibliographic Details
Published in:Acta seismologica sinica 2000-01, Vol.13 (1), p.8-18
Main Authors: Qin, Jia-Zheng, Qian, Xiao-Dong, Zhang, Jun-Wei, Xie, Qing-Yin
Format: Article
Language:English
Subjects:
Earthquakes
Ground motion
Grounds
Mathematical models
Plate tectonics
Seismic activity
Seismic engineering
Seismic phenomena
Seismology
Shear stress
Spatial analysis
Spectra
Stress concentration
Stresses
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Follow Chen and Duda's model of spectral fall-off of ω^sup 3^, the dependence of peak parameters of ground motion, peak displacement d ^sub m^, peak velocity v ^sub m^ and peak acceleration a ^sub m^, upon the environment stress τ ^sub 0^-values are studied using near source seismic digital recordings for the sequence of the Wuding, Yunnan, M=6.5 earthquake, in which, as a new thought, the peak parameters are assumed to be related to the medium Q-value. Three formulae for estimating the environment stress τ ^sub 0^-values by the peak parameters of three types of ground motions are derived. Using these formulae, the environment stress τ ^sub 0^-values are calculated for the sequence of the Wuding earthquake. The result show that τ ^sub 0^-values calculated by the three formulae are constant largely, the averages of τ ^sub 0^ are in the range of 5.0-35 MPa for most earthquakes. It belongs to the high-stress earthquakes sequence: the high-stress values are restricted to the relatively small area closely near to the epicenter of the main shock. The fine distribution structure for the contours of the environment stress τ ^sub 0^-values is related closely to the strong aftershocks. The analysis of spatial and temporal feature of τ ^sub 0^-values suggests that the earthquakes sequence in a rupture process generated at the specific intersection zone of seismo-tectonics under high-stress background.[PUBLICATION ABSTRACT]
ISSN:1000-9116
1674-4519
1993-1344
1867-8777
DOI:10.1007/s11589-000-0077-9