Science in China Series D: Earth Sciences

, Volume 46, Supplement 2, pp 75–81 | Cite as

Observations of remote coseismic stress step-changes



The study on stress triggering and stress shadow is a frontier subject of current seismologic research. One of the problems presently encountered is the lack of reliable observation of real coseismic stress changes at locations remote to the epicenter. At Changping Station near Beijing, coseismic step-changes were recorded for the Mw6.3 Zhangbei quake on 10 January, 1998 and the Mw5.8 Zhangbei quake on 11 March, 1999, by a RZB borehole component strainmeter. Based on analyses of these recordings, this paper shows observed coseismic step-changes of the horizontal component of strain tensor. The strain step-changes reach the order of 10−8 and, correspondingly, stress step-changes reach as high as 10−4 MPa. The results are significantly higher than linear elastic theoretical values. However, as self-checking can be carried out with the 4 groups of data recorded by the 4-component strainmeter, it has proved that the results are reliable.


stress triggering strain observation coseismic strain step-changes 


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Copyright information

© Science in China Press 2003

Authors and Affiliations

  1. 1.Graduate School of Chinese Academy of SciencesBeijingChina
  2. 2.Institute of Crustal DynamicsChina Seismological BureauBeijingChina

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