A discussion on the records of water level “precursors” in Well Shuozhou, Shanxi Province

• Published in: Acta seismologica sinica Vol. 15; no. 2; pp. 226 - 233
• Main Authors: Che, Yong-tai, Yu, Jin-zi, Zhang, Shu-liang, Fan, Xue-fang, Guo, Jun-jie, Zhang, Tian-yuan, Yang, Jin-lan
• Format: Journal Article
• Language: English
• Published: Beijing Springer Nature B.V 01.03.2002; Institute of Geology, China Seismological Bureau, Beijing 100029, China%Seismological Bureau of Shanxi Province, Taiyuan 030002, China%Seismological Office of Shuocheng District, Shuozhou, Shanxi Province, Shuozhou 038500, China
• Subjects: Earthquake prediction; Earthquakes; Fluctuation; Fluid dynamics; level; precursor; Precursors; Recording; Seismic activity; Seismic phenomena; Shuozhou; water; Water levels; well; Well water; Well waters; precursor; Well Shuozhou; well water level
• ISSN: 1000-9116; 1674-4519; 1993-1344; 1867-8777
• DOI: 10.1007/s11589-002-0012-3

A lot of slow fluctuations of water level have been observed in the original recording maps of subsurface fluid in Well Shuozhou, Shanxi Province. Some typical recording maps of the (precursors( are introduced in the paper and the features of the (precursors( recorded by the well are analyzed. The results show that 38% strong earthquakes possess this kind of record, which has a fluctuation period arranging from several to tens of minutes and appear mostly two days before the earthquakes. Moreover, the mechanism, transmission and responding conditions of well water level are discussed, as well as the scientific meaning and practical value of the (precursor( of the well water level in earthquake predictions.