Observational evidence of anisotropic changes of apparent resistivity before strong earthquakes
Observational evidence of anisotropic changes of apparent resistivity before strong earthquakes
复制标题
强震前视电阻率各向异性变化的观测证据
DOI：
10.1093/gji/ggx235
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发表时间：
2017-09
影响因子：
2.8
通讯作者：
Mingxin Yue
中科院分区：
文献类型：
--
作者：
Jianguo Zhang;Xiaopng Wu;Xiaodong Yang;Wei Du;Mingxin Yue
采用归一化月变化率方法对我国两次历史强震前周边7个地电阻率站的观测数据进行了研究。分析了视电阻率各向异性变化与震源机制解对应的最大主应力方向之间的关系。结果表明，在接近垂直于最大压主应力方位角的方向上出现了显着的视电阻率变化，而在接近平行的方向上仅记录到了较小的波动。在第一种情况下，一年尺度的下降和视电阻率的短期增加是显而易见的。我们还认为，视电阻率的各向异性变化在地震断裂带（或附近）比在断层两侧更为显着。我们得出的结论是，估计地震震中最有效的方法是增加地震断裂带内观测网络的密度，并根据这种物理现象合理布置电极方向。
The observation data of seven circumjacent terrestrial resistivity stations before two strong historical earthquakes in China were studied through performing the method of normalized monthly variation rate. We analysed the relationship between anisotropic variations of apparent resistivity and the corresponding maximum principal stress’s direction of the focal mechanism solution. The results may demonstrate that significant apparent resistivity variation occurs in the direction nearly perpendicular to the azimuth of the maximum compressive principal stress, while only small fluctuations were recorded in nearly parallel direction. In the first case, a decrease in 1 yr scale and a short-impending increase of apparent resistivity were clear. We also suggest that anisotropic variation of apparent resistivity is more substantial in (or near) the seismic fracture zone than at two sides of the fault. We conclude that the most effective way to estimate the epicentre of an earthquake is to increase the density of observation networks within the earthquake fault zone and to reasonably dispose electrode orientations based on this physical phenomenon.
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固体-多孔界面上的震电转换产生的倏逝电磁波的存在
影响因子：
2.8
作者：
Ren Hengxin;Huang Qinghua;Chen Xiaofei
通讯作者：
Chen Xiaofei
DOI：
10.1073/pnas.1423684112
发表时间：
2015-01
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
Qinghua Huang
通讯作者：
Qinghua Huang
影响因子：
3
作者：
Huang, Qinghua;Ding, Xia
通讯作者：
Ding, Xia
影响因子：
--
作者：
Xuebin Du;A. Ruan;Shilong Fan;Z. Hao
通讯作者：
Xuebin Du;A. Ruan;Shilong Fan;Z. Hao
影响因子：
2.8
作者：
H. Ren;Qinghua Huang;Xiaofei Chen
通讯作者：
H. Ren;Qinghua Huang;Xiaofei Chen