Earth Planets Space, Vol. 54 (No. 8), pp. 861-870, 2002
Koji Matsunami1, Takeshi Morii2, Yuka Okamoto2, and Teizo Fujiwara2
1Disaster Prevention Research Institute, Kyoto University, Kyoto 611-0011, Japan
2School of Environmental Science, University of Shiga Prefecture, Hikone 522-8533, Japan
(Received January 17, 2002; Revised July 26, 2002; Accepted July 29, 2002)
Abstract: The degree of damage to wooden houses in the vicinity of the source area of the 2000 Western Tottori Earthquake was very low compared to the 1995 Hyogo-ken Nanbu Earthquake. Shimoenoki in Hino Town, however, suffered remarkable damage compared to other villages, particularly to residential wooden houses. Furthermore, although Shimoenoki is a small area of only 300 400 m2, the damage varied markedly from the foot of the mountains through central Shimoenoki to the Hino River. From the damage distribution based on a survey of all wooden houses, the local site-amplification characteristics estimated from aftershock records, and the transfer functions of wooden houses evaluated using microtremors, the spatial variation of damage appears to be attributed to the variation in site-amplification factors at frequencies between 2 and 5 Hz, which is close to the first natural frequency of wooden houses.