| 講演要旨(和文) | | 一般に、Double-Difference法における拘束条件である相対走時の、絶対走時に対する重みの比率は、震源ペアの距離が近いほど大きく付けられる。本研究では、このDistance Weighting を補足するため、震源ペアを構成する波線の数と配置が逆問題の適切性に与える影響を考慮した重み付け方法を提案する。この方法は計算量が少ないので、震源の反復改良毎に再計算することで、動的な重み付けが行える。 |
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| | 講演要旨(英文) | | In a general approach in Double-Difference(DD) method, the pairs of hypocenters which are located nearer each other has higher weight as constraints of the relative travel time for the absolute travel time. We propose a method of weighting based on not only the distance between hypocenters but also the number and geometry of ray paths in a pair. The calculation cost of proposed method is low so that we can recalculate dynamically the weights in every relocation stage in a iterative method for non-linear solver. |
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