TY - JOUR
T1 - An imaging technique for subsurface faults using teleseismic-wave records
T2 - SH case
AU - Takenaka, H.
AU - Murakoshi, T.
AU - Suetsugu, D.
AU - Furumura, T.
PY - 1996
Y1 - 1996
N2 - It is important for disaster prevention and public safety design to know whether subsurface faults exist, not only in Kobe, which was heavily damaged by the 1995 Hyogo-ken Nanbu earthquake, but also in any urban area which is tectonically active. However, there is still little information on subsurface faults. In this paper, we propose a new approach for sensing subsurface faults using teleseismic-wave array records. Our new method employs an imaging technique similar to the reflection method, but is much less expensive and can be used in urban areas. The target of our method is not the velocity structure itself, but rather the position and size of a subsurface fault. The method proposed in this paper consists of the following steps: 1) pre-processing observed records, 2) forward calculation, 3) calculation of the steepest descent direction of the model parameters, and 4) image analysis and identification of faults. The feasibility of the method is demonstrated using SH synthetic data.
AB - It is important for disaster prevention and public safety design to know whether subsurface faults exist, not only in Kobe, which was heavily damaged by the 1995 Hyogo-ken Nanbu earthquake, but also in any urban area which is tectonically active. However, there is still little information on subsurface faults. In this paper, we propose a new approach for sensing subsurface faults using teleseismic-wave array records. Our new method employs an imaging technique similar to the reflection method, but is much less expensive and can be used in urban areas. The target of our method is not the velocity structure itself, but rather the position and size of a subsurface fault. The method proposed in this paper consists of the following steps: 1) pre-processing observed records, 2) forward calculation, 3) calculation of the steepest descent direction of the model parameters, and 4) image analysis and identification of faults. The feasibility of the method is demonstrated using SH synthetic data.
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U2 - 10.4294/jpe1952.44.529
DO - 10.4294/jpe1952.44.529
M3 - Article
AN - SCOPUS:0030423126
VL - 44
SP - 529
EP - 541
JO - Journal of Physics of the Earth
JF - Journal of Physics of the Earth
SN - 0022-3743
IS - 5
ER -