CAJ | 학술논문

收集云南地区井水温数字化观测资料,对比分析了2011年3月11日日本9.0级和2008年5月12日汶川8.0级2次地震引起的云南地区井水温同震响应特征。结果表明,不同构造区域的观测井的井水温同震响应存在差异,主要与井孔本身的特征和区域构造环境有关;同一口观测井对不同地震引起的水温响应变化形态基本一致,不受地震方位和震源机制的影响,井水温同震下降或上升响应幅度随震级的增大而增大,随震中距的增大而减小;井水温同震响应的机理主要是在地震波的作用下,观测井孔中的水体受震荡激发而加速对流与掺混导致水温发生变化,当地震波逐渐平息,探头附近的井水温逐步恢复。
수집운남지구정수온수자화관측자료,대비분석료2011년3월11일일본9.0급화2008년5월12일문천8.0급2차지진인기적운남지구정수온동진향응특정。결과표명,불동구조구역적관측정적정수온동진향응존재차이,주요여정공본신적특정화구역구조배경유관;동일구관측정대불동지진인기적수온향응변화형태기본일치,불수지진방위화진원궤제적영향,정수온동진하강혹상승향응폭도수진급적증대이증대,수진중거적증대이감소;정수온동진향응적궤리주요시재지진파적작용하,관측정공중적수체수진탕격발이가속대류여참혼도치수온발생변화,당지진파축점평식,탐두부근적정수온축보회복。
Based on water temperature digital data of wells in Yunnan province,the characteristics of coseismic changes of water temperature caused by Japan M9.0 and Wenchuan M8.0 earthquakes are analyzed.The results show that the characteristics are different in the different structure areas,and this may be related with the conditions,local geological structures and tectonic environments;the characteristics are similar in the same well for the different earthquakes,and they are not related with the earthquake direction and mechanism,but the temperature will be increased with the earthquake magnitudes or decreased with the epicentral distances.Under the dynamic loading of seismic wave,the accelerated convection and mixing of different temperature water in virtue of seismic wave caused water temperature changes,when the fluctuation of seismic wave gradually is quiet down,the water temperature near the probe begins to normal.