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EARTHQUAKE ›› 2016, Vol. 36 ›› Issue (1): 78-86.

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Analysis of Cross-fault Deformation Data with Annual Sliding Velocity Ratio Method

LI Jie1, ZHU Cheng-lin1, FENG Zhi-jun1, Han Hai-hua1, JIA Yuan1, WANG Xue-ying2   

  1. 1. Earthquake Administration of Shandong Province, Shandong Jinan 250014, China;
    2. Earthquake Administration of Anhui Province, Anhui Hefei 340100, China
  • Received:2015-04-09 Published:2020-07-03

Abstract: We proposed an annual sliding velocity ratio to annalyse cross-fault deformation observation data. This can be used to eliminate gross error, normal annual dynamic observation and linear trend component, and to highlight the abnormal change information. We use the method to analyze fault activity level in a region by synthesis under a unified dimensionless datum. As an example, we calculated anomalies of annual sliding velocity ratio of the cross-fault deformation observation in Sichuan before the Lushan MS7.0 earthquake on April 20, 2013. The results show that the method has better feasibility and practicability in the study of earthquake analysis and prediction.

Key words: Annual sliding velocity ratio, Cross-fault deformation observation, The 2013 Lushan MS7.0 earthquake

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