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Journal: Tectonophysics  2013 No.63  Share to Sinaweibo  Share to QQweibo  Share to Facebook  Share to Twitter    clicks:1008   
Title:
Tide-factor anomalies from observations of well level in the Sichuan Province prior to the great Wenchuan earthquake of 2008
Author: Chenglong Liu, Guangcai Wang, Zheming Shi, Yinju Xu, Huina Fang, Jinwei Wang
Adress: Institute of Geology, China Earthquake Administration, Beijing 100029, China
Abstract: We systematically calculated the tide-factors of M2 and O1 waves of the earth tide using water level data from 16 wells in the Sichuan Province acquired 2 years prior to the great Wenchuan earthquake of 2008. Our purpose was to extract anomalies in the tide-factors and analyze their variations in time and space. The results indicate that these anomalies are related to the Wenchuan quake of 2008. The numbers of wells that exhibited anomalies of the O1 wave tide-factor increased gradually as time approached the occurrence of the quake. These anomalies were distributed in space in a discontinuous manner. In terms of such signals, it is possible to exclude the interferences from other factors such as rainfall and exploitation to some extent when we attempt to use anomalous well level variations to predict future earthquakes.
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