Abstract
On November 22, 2014, an earthquake (M6.7) occurred in the northern part of Nagano Prefecture, central Japan. The JMA seismic intensity of 6 lower was recorded in Nagano City, Otari and Ogawa Villages. Damage of the building is as follows: The number of completely destroyed was 81, half destroyed was 162 and partially destroyed was 1,818. Seismic damage has occurred in Nagano City, Iizuna Town, Shinano Town and Ogawa Village as well as Hakuba and Otari Villages around the epicenter.
We have begun investigating of the earthquake damage in Nagano City, Iizuna Town, Shinano Town and Ogawa Village from immediately after the earthquake. Distribution maps of the seismic damages were made on the basis of our research data and the seismic damages data that were provided by Nagano City Office, Iizuna Town Office and Ogawa Village Office. As a result, in east of the epicenter, remarkable damage by ground motion revealed that occurred in a wide region spanning 30 km. In the east side of the Hakoshimizu to Asakawa districts which is located on the west side of the edge of the Nagano Basin, it was also revealed that the earthquake damage is sharply reduced. In addition, by utilizing such existing geological maps and landslide distribution maps, it was also examined the relationship between earthquake damage and topographical-geological features.
