Abstract
Traces of paleo-earthquakes, were found out at many archaeological sites, in Japanese Archipelago. Especially, traces of liquefaction have frequently found out during the excavation of the alluvial lowland, and the formation age was estimated by archaeological features and remains. Most remarkable features are dykes composed sand and gravel in which grains become finer approaching the surface. These traces sometimes make good the loss of the historical records, and useful for investigation about the history of great earthquakes, supposed to have occurred periodically along the Nankai trough. The estimated age of traces is sometimes corresponded to the date of historical earthquake, such as “Fushimi earthquake” occurred in 1596, and we can get concrete evidences about the ground disaster caused by the earthquake.
