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Characteristics of coseismic water level changes at Tangshan well for the Wenchuan Ms8.0 earthquake and its larger aftershocks

Baojun Yin Li Ma Huizhong Chen Jianping Huang Chaojun Zhang Wuxing Wang

地震学报（英文版）2009，Vol.22Issue(2)：149-157,9.
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地震学报（英文版）2009，Vol.22Issue(2)：149-157,9.DOI:10.1007/s11589-009-0149-4

Characteristics of coseismic water level changes at Tangshan well for the Wenchuan Ms8.0 earthquake and its larger aftershocks

Characteristics of coseismic water level changes at Tangshan well for the Wenchuan Ms8.0 earthquake and its larger aftershocks

Baojun Yin 1Li Ma 2Huizhong Chen 3Jianping Huang 2Chaojun Zhang 2Wuxing Wang2

作者信息

  • 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
  • 2. Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China
  • 3. Earthquake Administration of Tangshan City, Tangshan 063000, China
  • 折叠

摘要

Abstract

Coseismic water level changes which may have been induced by the Wenchuan MS8.0 earthquake and its 15 larger aftershocks (MS≥5.4) have been observed at Tangshan well. We analyze the correlation between coseismic parameters (maximum amplitude, duration, coseismic step and the time when the coseismic reach its maximum amplitude) and earthquake parameters (magnitude, well-epicenter distance and depth), and then compare the time when the coseismic oscillation reaches its maximum amplitude with the seismogram from Douhe seismic station which is about 16.3 km away from Tangshan well. The analysis indicates that magnitude is the main factor influencing the induced coseismic water level changes, and that the well-epicenter distance and depth have less influence. MS magnitude has the strongest correlation with the coseismic water level changes comparing to MW and ML magnitudes. There exists strong correlation between the maximum amplitude, step size and the oscillation duration. The water level oscillation and step are both caused by dynamic strain sourcing from seismic waves. Most of the times when the oscillations reach their maximum amplitudes are between S and Rayleigh waves. The coseismic water level changes are due to the co-effect of seismic waves and hydro-geological environments.

关键词

Wenchuan MS8.0 earthquake/Tangshan well/coseismic water level variation/analog water level record

Key words

Wenchuan MS8.0 earthquake/Tangshan well/coseismic water level variation/analog water level record

分类

天文与地球科学

引用本文复制引用

Baojun Yin,Li Ma,Huizhong Chen,Jianping Huang,Chaojun Zhang,Wuxing Wang..Characteristics of coseismic water level changes at Tangshan well for the Wenchuan Ms8.0 earthquake and its larger aftershocks[J].地震学报（英文版）,2009,22(2):149-157,9.

基金项目

This study is supported by National Natural Science Foundation of China (No. 40574020) and Basic Research item of Institute of Earthquake Science, China Earthquake Administration (No. 0207690236). （No. 40574020）

地震学报（英文版）

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