1986 年 39 巻 2 号 p. 277-287
The Tenmei Odawara Earthquake outbroke in early morning of 23th August, 1782, and damages of building and houses took place at the castle town of Odawara and its vicinity, 80km SW of Tokyo. USAMI et al. (1984) had newly found out several kind of old documents and had made clear that intensity V or more was felt within the circle with the radius of 45km around Odawara. No reliable record of tsunami had been found out, and it had been considered that no tsunami was accompanied. But in the recent few years two old documents with tsunami disaster records at the fishery harbor of Ajiro in Atami City, 100km SW of Tokyo, were newly found out, inundation height was surveyed as 4 meters, and tsunami magnitude was estimated as m=1. The magnitude of the earthquake was judged by comparison of magnitude of tsunami, and areas of intensities III-IV, V, and VI with the 1982 Urakawa-Oki Earthquake-Tsunami (M=7.1, tsunami magnitude m=0), and was estimated as M=7.2. The Location of the epicenter was suggested to be situated at (35.1°N, 139.2°E), about 10km in the offing of Atami City.