Estimation of Fault Strength: Reconstruction of Stress Before the 1995 Kobe Earthquake
Estimation of Fault Strength: Reconstruction of Stress Before the 1995 Kobe Earthquake
复制标题
断层强度估计：1995 年神户地震前应力重建
DOI：
10.1126/science.1101771
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发表时间：
2004
期刊：
影响因子：
56.9
通讯作者：
K. Omura
中科院分区：
文献类型：
--
作者：
F. Yamashita;E. Fukuyama;K. Omura
我们利用断层附近水力压裂实验获得的原位震后应力测量值，估算了 1995 年日本神户地震（震级 6.9 级）之前的应力场。我们使用从地震波形和大地变形反演的运动源模型重建了预震应力场。我们发现，在断层中心，震前断层面两侧完全耦合，摩擦系数为0.6，相当于坚固的地壳。在断层边缘，预计预震应力方向可能会发生地震滑移。
We have estimated the stress field before the 1995 Kobe, Japan, earthquake (moment magnitude 6.9) using in situ post-shock stress measurements obtained from hydraulic fracturing experiments near the fault. We reconstructed the pre-shock stress field using a kinematic source model inverted from seismic waveforms and geodetic deformations. We found that at the center of the fault, two sides of the fault surface coupled completely before the earthquake, with a coefficient of friction of 0.6, which is equivalent to strong crust. At the edge of the fault, a possible aseismic slip is expected to occur from the pre-shock stress orientation.
影响因子：
3
作者：
Y. Okada
通讯作者：
Y. Okada