| 講演要旨(和文) | | 浅部の基盤構造をイメージングすることを目的として，福岡市生の松原地区において表面波探査とS波反射法を実施した．九州大学演習林となっている松林の中とその外側海岸に沿ってのそれぞれ約600mの２測線のうち松林の中（測線１）ではS波反射法のみを実施した．両者を実施した測線２で両者の結果を比較した．反射法探査ではいくつかの反射面を捉えることができ，その最下位のものは基盤である古第三系姪浜層のトップからの反射面と考えられる．これと表面波探査結果の200m/sになる深さとの対応はかなり良い． |
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| | 講演要旨(英文) | | We conducted high-resolution shallow seismic reflection survey and surface-wave survey at Ikinomatsubara area, Fukuoka City to image shallow basement structure. Two about 600m-long S-wave seismic lines were set along the coastal line. One is in pine tree forest (Line 1) and the other is just outside the forest and about 20m from the coastal line(Line 2). The distance between the two lines is about 50m. The surface-wave survey was conducted only on Line2. We compared the result of two surveys on Line2. The reflection depth sections profile several continuous reflection events at the near surface. The velocity section by the surface-wave survey shows velocity change at the depth of 6-10m. This chage correspond to the reflection from the basement in the reflection survey. |
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