| 講演要旨(和文) | | 2005年〜2009年の間、過去3度に渡って、愛知県新城市鳳来において、土岐ACROSS信号を観測した。1度目と2度目の観測の結果、ACROSS信号の安定性とアレイ観測の再現性が証明された。また、伝達関数に関して千分ランス解析を行い、土岐ACROSS信号の到来方向が決定された。Tsuruga et al.,2005 によって見積もられたACROSS理論走時と比較し、P波初動やプレート境界からの反射波などが推定された。これらの波群の到来方向はACROSS震源の方向と一致している。 |
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| | 講演要旨(英文) | | ACROSS signal from Toki was observed at Horai in Aichi Prefecture over three observation periods during 2005 ~ 2009. As the result of the first and second observation, we proved both the stability of ACROSS signal and repeatability of array observation. The arrival direction of ACROSS signal from Toki was determined using semblance analysis of the transfer function. The first arrival and several reflected waves such as that from the plate boundary were identified by comparing with the travel time information by Tsuruga et al.,2005. The arrival direction of those waves are coincide with the direction of the ACROSS source. |
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