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

作者：HOU Jinxin,XIE Fan,REN Yaqiong,WANG Baoshan

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.

發文機構：Key Laboratory of Seismic Observation and Geophysical Imaging School of Earth and Space Sciences

關鍵詞：STICK-SLIPAcousticemissionmatched-filtertechniqueSpatiotemporalevolutionFaultslip

分類號： P31[天文地球—固體地球物理學]