令和5年奥能登地震 : 地場産業と寺社の被害

2023年5月5日に発生した奥能登地震の被害調査を実施した．特に，奥能登地方を代表する地場産業や寺社の被害に注目した．距離減衰式にて珠洲市周辺の最大加速度や計測震度の距離減衰特性を整理した．距離減衰式による推定値は観測値より大きめの値を与えるものの概ね妥当であることを確認した．地場製造業での調査では老朽化した建屋，窯，土壁など耐震性の低い構造物が損傷した．寺社の被害調査からは重心が高い鳥居や鐘楼堂などが強い揺れのために倒壊した．鳥居，鐘楼堂などはいずれも土台との接合部で断裂し，倒壊に至ったことがわかった．

We conducted a damage survey of the Okunoto earthquake that occurred on May 5, 2023. In particular, we focused on the damage to local industries that represent the Oku-Noto region and temples and shrines. We organized the distance attenuation characteristics of the maximum acceleration and measured seismic intensity around Suzu City using the distance attenuation formula. We confirmed that the estimate data by the distance attenuation equation are generally valid although they give larger values than the observed values. Surveys conducted by local manufacturing companies showed that aging buildings, kilns, and other structures with low earthquake resistance were damaged. Damage surveys of temples and shrines revealed that torii gates and bell towers, which have a high center of gravity, collapsed due to strong shaking.

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