2024-03-28T09:03:01Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00032048
2022-12-19T04:06:48Z
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The Izu-Hanto-oki Earthquake of 1974 and the Earthquake Faults, Especially, the Relationships Between the Earthquake Faults, the Active Faults, and the Fracture Systems in the Earthquake Area
1974年伊豆半島沖地震の地震断層、とくに活断層および小構造との関係
村井, 勇
71084
金子, 史朗
71085
051.1
The southern end of the Izu Peninsula was attacked by a fairly intensive earthquake, with a magnitude of 6.9 at 8:33 a.m. on May 9, 1974. The epicenter was located at 138°48'E, 34°34'N, off the southern end of the Peninsula. It was reported by the Shizuoka Prefecture that 29 persons were killed, 82 persons were injured (one person died later), 364 houses were intensively damaged. The villages of Irozaki, Nakagi, Iruma, Mera, Koura, Ochii, and Ihama in Minami-izu-machi suffered the most damage. The destruction was concentrated in a zone aligned in a NW-SE direction and situated along the major active faults in this earthquake area. Distinct earthquake faults appeared along the active faults and lineaments which lay in a NW-SE direction. Distinct fault planes jn the Tertiary rocks were observed at several spots. An echelon of fissures and cracks with a NW-SE trend occurred along the traces of the faults. The fault movement was composed of aright lateral displacement and vertical displacement of the subsidence of the north-eastern block. Maximum displacement of lateral slip were about 45cm and those of the vertical slip were about 25cm. Measurements were made along the fault planes in rocks as well as along the fissures and cracks in the ground.
1974年伊豆半島沖地震調査概報
departmental bulletin paper
東京大学地震研究所
1974-09
application/pdf
地震研究所研究速報
14
159
203
AN10165194
https://repository.dl.itc.u-tokyo.ac.jp/record/32048/files/jis0140017.pdf
jpn