Monitoring Contact State of Laboratory Fault with Coda Transmission Waves

作者：XIE Fan,REN Yaqiong,HOU Jinxin

摘要：We monitored the amplitude changes of coda transmission waves around 500 kHz across the frictional interface of a simulated 1. 5-meter-long fault during normal stress holding test.We find that the amplitude of coda transmission waves increases with the logarithm of stationary contact time. Localized increase amounted to a level ranging from 4% to 16%along the fault is observed during the 1-hour experiment. We discuss that the frictional strength at mesoscopic scale,which is related to the amplitude of coda transmission waves,is responsible for the phenomenon. Combining the reported method with other complementary approaches will enhance the understanding of fault mechanism either at laboratory or on-site applications.

发文机构：Institute of Geophysics

关键词：CODAtransmissionwavesLABORATORYFAULTFrictionalcontactarea

分类号： P31[天文地球—固体地球物理学][天文地球—地球物理学]