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地震 ›› 2008, Vol. 28 ›› Issue (3): 69-78.

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宾川井对印尼大震的同震响应特征及其机理解释

孙小龙, 刘耀炜, 王博   

  1. 中国地震局地壳应力研究所, 北京 100085
  • 收稿日期:2007-10-29 修回日期:2007-11-29 出版日期:2008-07-31 发布日期:2021-10-29
  • 作者简介:孙小龙(1981-), 男, 甘肃临洮人, 2007年获硕士学位, 主要从事地震地下流体及地震预报等研究。
  • 基金资助:
    基本科研业务专项资金(ZDJ2007-21); “十一五”国家科技支撑计划(2006BAC01B03-03-01)

Feature and Mechanism of Co-seismic Response in Binchuan well to Indonesia Earthquakes

SUN Xiao-long, LIU Yao-wei, WANG Bo   

  1. Institute of Crustal Dynamics, CEA, Beijing 100085, China
  • Received:2007-10-29 Revised:2007-11-29 Online:2008-07-31 Published:2021-10-29

摘要: 系统统计分析了云南宾川井水位与水温对印尼苏门答腊4次大震的同震响应资料。 宾川井在这4次强震中的同震响应形态表现为水位振荡—水温下降和振荡停止(减弱)—水温恢复。 进一步的分析表明, 水位与水温的变化幅度与震中距、 震级有一定的统计关系。 分别探讨了水位振荡—水温下降和振荡停止—水温恢复现象产生的机理, 综合分析了前人所提出的同震响应机理, 并依据宾川井实际观测资料对机理进行了定量化的数值模拟。 模拟结果显示, 气体逸出、 热弥散及冷水下渗作用都可以导致井水温度下降, 而水温的恢复则主要是与围岩发生静态热传导所致。

关键词: 苏门答腊, 同震响应, 机理解释, 云南宾川

Abstract: Co-seismic response of water level and temperature in Binchuan well to 4 earthquakes in Sumatra-Andaman has been analyzed and co-seismic forms all represented water level oscillation with temperature decrease and water level oscillation stop with temperature resumes. Further analyses indicate that amplitude of water level and temperature variation is concerned with epicentral distance and magnitude. Mechanisms of water level oscillation with temperature decrease and water level oscillation stop with temperature resume is discussed. Previous co-seismic mechanism is analyzed and quantitative simulation has been carried. Result shows that gas emission, heat dispersion and cold water seeping could lead water temperature decreased, and temperature resume mostly resulted in heat exchange between well water and wall rock.

Key words: Sumatra-Andaman, Co-seismic responses, Mechanism explain, Binchuan

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