Possible precursory anomalies in ground water level associated with the Wenchuan Ms 8.0 earthquake in 2008,Sichuan,China

作     者：Chenglong Liu Guangcai Wang Zheming Shi Dan Zhao Hui Zhang Chenglong Liu;Guangcai Wang;Zheming Shi;Dan Zhao;Hui Zhang

作者机构：Institute of GeologyChina Earthquake AdministrationBeijing100029China School of Water Resources and Environmental ScienceChina University of GeosciencesBeijing100083China China Aero Geophysical Survey and Remote Sensing Center for Natural ResourcesBeijing100083China 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2020年第11卷第2期

页      面：127-134页

学科分类：0709[理学-地质学] 070801[理学-固体地球物理学] 07[理学] 0707[理学-海洋科学] 0708[理学-地球物理学] 0705[理学-地理学] 0815[工学-水利工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(41572238,U1602233) Special Funds for Scientific Research of the Institute of Geology,China Earthquake Administration(IGCEA1205) Special Projects for Seismological Community(200808079) 

主　　题：Wenchuan earthquake Precursory anomalies Ground water level Temporal-spatial distribution Sichuan province 

摘      要：We have examined the water level data from 16 wells in Sichuan province,China,recorded before the Wenchuan Ms8.0 earthquake occurred in *** found that the data of 5 among these wells exhibit possible precursory anomalies,which are respectively named the Chuan No.08 well in Deyang,Chuan *** well in Pujiang,Chuan No.13 well in Luzhou,Chuan No.22 well in Qionglai and *** time durations,these anomalies are of long-,intermediate-and short-term signals which are primarily distributed on the northeast(NE)trending Longmenshan fault zone as well as the parallel Huayingshan fault *** seems that the variations of the well levels on the Huayingshan fault zone imply compression while those on the Longmenshan fault zone reflect *** anomalies occurred first in the areas outside the epicenter region of the Wenchuan Ms8.0 earthquake,then migrated to the seismogenic fault *** they migrated from southwest to northeast in agreement with the rupture process of the main shock.