| Monitoring Contact State of Laboratory Fault with Coda Transmission Waves |
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| 作者姓名： | XIE Fan REN Yaqiong HOU Jinxin |
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| 作者单位： | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| 基金项目： | This project was sponsored by the National Natural Science Foundation of China (41874061). |
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| 摘 要： | We monitored the amplitude changes of coda transmission waves around 500kHz 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.
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| 关 键 词： | Coda transmission waves Laboratory fault Frictional contact area |
| 收稿时间： | 2019/4/15 0:00:00 |
| 修稿时间： | 2019/5/8 0:00:00 |
Monitoring Contact State of Laboratory Fault with Coda Transmission Waves |
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| XIE Fan,REN Yaqiong,HOU Jinxin.Monitoring Contact State of Laboratory Fault with Coda Transmission Waves[J].Earthquake Research in China,2019,33(3):431-436. |
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| Authors: | XIE Fan REN Yaqiong and HOU Jinxin |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China and Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | We monitored the amplitude changes of coda transmission waves around 500kHz 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. |
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| Keywords: | Coda transmission waves Laboratory fault Frictional contact area |
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