Plane-wave decomposition into P and S waves using dispersion relationship for three component and three dimensional reflection seismic data

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  • 3成分3次元反射法地震探査データにおける分散関係式を用いたP波とS波の平面波分解
  • 3 セイブン 3ジゲン ハンシャホウ ジシン タンサ データ ニ オケル ブンサン カンケイシキ オ モチイタ Pハ ト Sハ ノ ヘイメンハ ブンカイ

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Abstract

 We developed a method to separate P, SV and SH waves from three component (3C) and three dimensional (3D) reflection seismic data by a plane wave decomposition in frequency-wave number (kx, ky) domain. First, we applied the method to 3C-3D synthetic data and demonstrated to separate multi-mode mixed wave fields into P, SV and SH modes, respectively. Furthermore, we applied the method to an actual 3C-3D field data. As a result, the developed method improved the S/N ratio of P-wave signals and it extracted P-SV converted waves properly. These application results to the synthetic and actual data proof the validity and applicability of this method.<br>

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