著者

都司 嘉宣 白 雲燮 秋 教昇 安 希洙

出版者

独立行政法人防災科学技術研究所

雑誌

防災科学技術研究資料

巻号頁・発行日

vol.90, pp.1-96, 1985-01-14

---

At 12h00m, 26th May 1983, a large earthquake with magnitude 7.7 broke out off the coast of the Akita Prefecture, the north-east part of the Honshu Island, Japan. Accompanying with the earthquake a huge tsunami with height of 14 meters in maximum hit the coasts of Japan. Just 100 persons were killed due to the tsunami in Japan. About 90 minutes after the outbreaking of the earthquake, the tsunami reached to the east coast of the Korean Peninsula. Tsunami with inundation height of 5 meters was observed on Ullung Is. Tsunami also seriously attacked the mainland of Korea after 14h. Two fishermen were lost, and two persons were injured at Imwon Port. Wondok Town, Kangwon-do, where tsunami height of 3.6-4.0m was recorded, fishing boats rushed into the residential area, and a gas oil tank with volume of 130, 000 litters was carried by about 10 meter. One person was killed at Tonghae City. The amount of damage in the Republic of Korea is about 400 milion won (about 500 thousand US dollars). The initial movement of the sea level was upwards on the tide gauge records at Pusan. Ulsan, Mukho (Tonghae City), Sokch'o, and Chodong (Ullung Island), but only at P'ohang port downwards initial movement was recorded. The Kamuizaki-Oki Earthquake Tsunami of 1940-VIII-2 (M=7.5) also traversed the Japan Sea, and weaker tsunami with height of 0.5-2.0m recorded on the east coasts of the Korean Peninsula. Witnesses of this tsunami were newly discovered at Uljin Town, Kyongsang-Pukdo, and on Ullung Island, and tsunami of about 2 meters hit these places. The record of the Tsunami of the Kampo Earthquake (1741-VIII-29, M=7.5), which occurred off the south-west coast of Hokkaido Island and about 1, 500 persons were killed in Japan, was also newly discovered in the diary of the Choson Dynasty, and it was clarified that the tsunami hit the whole coasts of Kangwondo, where houses were swept and boats were destroyed. It is suggested that Yamato Rise, which is located in the center region of the Japan Sea, took a role of a lens on the propagation of these tsunamis. In the present paper the detailed report edited by Baek (1983) and studies on tsunamis and sea level anomalies made by Chu (1983) are introduced in chapters 2 and 3, respectively. Articles of the Nihonkai-Chubu Earthquake Tsunami on the Korean papers, and of historical earthquake tsunamis in old documents are mentioned in chapter 4 and 5, respectively. In chapter 6 old records of tidal waves are introduced.