HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Robinson, R. Articles by Zhou, S. Search for Related Content GeoRef GeoRef Citation

Stress Interactions within the Tangshan, China, Earthquake Sequence of 1976

¹ Institute of Geological & Nuclear Sciences
Box 30368
Lower Hutt, New Zealand
r.robinson{at}gns.cri.nz
 (R.R.)

² Department of Geophysics
Peking University
Beijing 100871, China
zsy{at}pku.edu.cn
 (S.Z.)

We have studied the static stress interactions between two mainshock subevents and the two largest aftershocks of the Tangshan, China, earthquake, M_s 7.8, 1976. Fault parameters were taken from previous studies based on inversion of geodetic and teleseismic waveform data. For each event in the sequence we calculated the static change in Coulomb failure stress (CFS), including changes in pore pressure, due to all preceding events. In all cases, for the preferred mechanical parameters, we found increased CFS over nearly the entire fault plane of concern. We think that stress interactions were important in determining where large aftershocks, away from the mainshock, might occur. Rapid determination of a mainshock’s location and mechanism, together with knowledge of nearby major faults, may be useful in postevent hazard estimates.