Table 1 Information of the last four historical earthquakes and tsunamis
From: Geological record of prehistoric tsunamis in Mugi town, facing the Nankai Trough, western Japan
Name of earthquake | Date (CE) a | Moment magnitude (Mw) | Rupture zonea | Coastalb, d deformation | Number of tsunami monuments in Mugi Town | Other descriptions in Mugi Town |
|---|---|---|---|---|---|---|
Keicho | 3 February1605 | No data | Various interpretations suggested | No data | No data | Mantokuji temple was washed away.f (The temple sat at 3.5 m T.P.g) |
Hoei | 28 October1707 | 8.6b | Z + A + B + C + D (+E?) | No data | No data | Tsunami waves ran up three rivers.f More than 700 houses were washed away and more than 100 people died.f Mantokuji temple was washed away.f The tsunami ran up to about 1.5Â km on the Uchizuma River. f,h |
Ansei-Nankai | 24 December1854 | 8.4b | Z + A + B | Uplift in Cape Muroto (1.2Â m)Subsidence in Kochi City (1.1Â m) | 2 Playground and Teba Islande | 640 houses were carried away and 39 people died.f The tsunami ran up to the steps of the Mantokuji temple along the Mugi River.f |
Showa-Nankai | 21 December1946 | 8.0b–8.3c | A + B | Uplift in Cape Shionomisaki (0.6 m) Cape Muroto (0.5–0.9 m) Subsidence in Mugi Town (0.3 m or more) Shishikui (0.6 m) | 3 Two are in a playground, and the other is in an elementary school. | The whole study site was inundated.d 151 houses were washed away and 52 people died.f The western part of Mugi Bay was more strongly affected than the eastern part because the tsunami came from the east.f |