Effect of Stress Perturbation on Acoustic Emission during Fault Friction: An Experimental Study
详细信息
- 责任者：Ma Shengli (State Key Laboratory of Earthquake Dynamics ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Miao A’li
- 刊名：Northwestern Seismological Journal
- 出版年：2011
- 卷期：33(1)
- 关键词：声发射 ; acoustical emissions ; 地震活动性 ; seismicity
- 页码：p.1-8，19
- 图表：6 illus., 19 refs.
- 分类号：0500
- issnNo：ISSN1000-0844
- isbnNo：CN62-1048/P
摘要
Effects of stress perturbation on acoustic emission (AE) during fault friction are studied by using medium-scale experiments of rock friction, and the characteristics of seismicity caused by coseismic stress change and its implication in earthquake forecasting are discussed. The experiments indicate that stress perturbation of square wave can obviously affect AE activity, it can trigger some AE events so that AE activity before stick-slip becomes stronger and occurs earlier. The results mean that whether the coseismic stress change caused by a strong earthquake can obviously affect strong seismic activity in its neighbour area, it is mainly depentent on if the absolute stress of faults comes close to instability strength.
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