Characteristics of the AE Distribution and Triggering Mechanism of a Simulated Meter-Scale Fault after Stick-Slip Events

• 作者: HOU Jinxin REN Yaqiong WANG Baoshan XIE Fan
• 来源期刊: 中国地震研究（英文版）
• 年，卷（期）: 2020,（3）
• 所属期刊栏目: Regular Articles
• 页码范围: 452-464
• 页数: 13页
• 语种: 英文
• DOI: 10.19743/j.cnki.0891-4176.202003005

摘要

With the more complete acoustic emission ( AE) catalog improved by the multi-channel AE matched-filter technique ( MFT) , we study the spatiotemporal evolution of the AE activities after laboratory stick-slip events incorporate with the slip data recorded by displacement transducers on an ～ 1. 5 m granite fault. The results show that the number of the AE events identified by MFT is about 9 times larger than that of the traditional method. A logarithmic expansion of early AE events along the fault strike is observed as a function of time, whereas the fault does not slip in the same manner. Thus, we related the expansion of the early AE events along the fault to the stress transfer caused by the adjacent AE events. Moreover, there is a good correlation between the cumulative number of the later AE events and the amount of fault slip. It suggests that the stress change caused by the continuous slip of the simulated fault after the stick-slip events response for the later AE events near or on the simulated fault.