十勝沖地震による地形災害
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概要
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On May 16th, 1968, at 09:49, an earthquake (Tokachi-oki Earthquake) with the magnitude of 7.8 occurred on the Pacific side of Tohoku and Hokkaido. Many of artificial embankments such as railroad basements, highway constructions and earth-fill dams were severely damaged. The connecting slopes to bridges were subsided in many cases, but the bridges were undamaged.<BR>On the alluvial lowlands, especially newly reclaimed or graded lands for factory areas around urban districts of Hakodate, Aomori, Mutsu and Hachinoho, there occurred many cracks, depressions and sand-jetting.<BR>It is characteristic of this earthquake that some steel-concrete buildings on the terrace surface collapsed.<BR>Land falls and landslides in the valleys dissecting the uplands to the west of Hachinohe City were the most disasterous accidents, in which the earthquake acted as a trigger after a heavy rain amounting 160mm in three days.
- 東北地理学会の論文
東北地理学会 | 論文
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