摘要
2008年汶川8.0级地震引起大范围流体观测同震和震后显著响应,本文通过对流体观测数据进行分析,确定了此次地震显著近场流体观测变化的台站。基于汶川8.0级地震永久形变引起的孔隙压力变化理论计算,讨论近场流体观测同震和震后变化的物理机制。为探讨强震引起的同震和震后流体影响空间特征,分别计算了不同机制类型不同震级所对应的流体响应,以期确定流体近场效应的空间特征,为强震同震和震后流体观测机理分析提供了有意义的参考。
The 2008 Wenchuan M8.0 earthquake caused a wide range of notable co-seismic and post-earthquake responses in fluid observation. We find the stations with notable change of near-field fluid observation by analysis of the data. Based on theoretical calculations of pore pressure changes caused by perpetual deformation with the earthquake, we discuss the physical mechanism of notable coseismic and post-earthquake changes in fluid observation. Then, in order to investigate the special characteristics of fluid effects caused by strong earthquakes, we separately calculate fluid response with different faulting styles and different magnitudes. It is expected that calculated near-field fluid effects can provide meaningful reference for mechanism analysis of fluid observation.
出处
《地震》
CSCD
北大核心
2012年第1期49-58,共10页
Earthquake
基金
2010年度中国地震局震情跟踪合同制任务(2010020801)资助
关键词
近场流体观测
孔隙压力
力学机制
汶川
8.0级地震
The 2008 Wenchuan M8.0 earthquake
Near-field fluid observation
Pore pressure
Physical mechanism
