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Proceedings Paper

Stress-strain sensor for monitoring seismic precursors and fault activities in the sand
Author(s): Qiujiao Du; Wei Sun; Zuoxun Zeng
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Paper Abstract

In this paper, a sensor to monitor stress-strain signals in a granular medium is used to detect seismic precursory information. Compared with the widely used sensors of borehole stress in the rock, the sensor has more convenient operation, higher output sensitivity, compactness and farther propagation effect. The stress and strain changes before Pu’er Ms6.4 earthquake in China are recorded by Beijing and Xinmin stations, and its corresponding fault activities are analyzed. Study indicates anomalous amplitude of strain signal reaches 10 times higher than that of ordinary background, and compressive oscillation and extensional oscillation occurred constantly before the earthquake. The method and results presented in the paper provide a new way for investigating seismic precursors for shallow-source earthquakes.

Paper Details

Date Published: 20 April 2016
PDF: 7 pages
Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 980353 (20 April 2016); doi: 10.1117/12.2239334
Show Author Affiliations
Qiujiao Du, China of Univ. Geosciences (China)
Univ. of Missouri-Columbia (United States)
Wei Sun, Beijing Precision Technology Co. Ltd. (China)
Zuoxun Zeng, China Univ. of Geosciences (China)

Published in SPIE Proceedings Vol. 9803:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016
Jerome P. Lynch, Editor(s)

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