摘要
讨论了均匀方位各向异性介质模型,运用电阻率变化的视各向异性与真各向异性的理论关系。研究了20个强震近震中区31个地电台的视电阻率变化各向异性与主应力的关系发现:与主压应力方位正交的测向(包括近于正交的测向)月速率变化幅度大于平行主压应力方位测向(包括近于平行的测向)的变化幅度;视各向异性变化与地震震级、震中距等均有一定的关系。
The homogeneous orientation anisotropy model is discussed in this paper, based on which the relation between apparent anisotropy and true anisotropy of resistivity variation have been derived, those 20 strong earthquakes data which recorded by 31 stations have been processed, and the results indicated that the variation ratio of apparent resistivity perpendicular（or near perpendicular） to the azimuth of maximum principal compression stress is greater than that in other azimuths. And the results proved that apparent resistivity anisotropy is related to the earthquake magnitude and epicentral distance in deed.
出处
《高原地震》
2006年第1期7-14,共8页
Plateau Earthquake Research
基金
中国地震局地震联合基金项目(102058)
兰州地震研究所青年基金(2005250)资助
关键词
均匀方位各向异性
主应力状态
EDA模型
Homogeneous orientation anisotropy
Principal stress state
EDA model
