Abstract
We carried out damage investigation around the seismic stations where high JMA seismic intensity scales were recorded in the 2007 Noto-hanto Earthquake. We found heavily damaged wooden houses around all the stations with 6+JMA scale. The ratios of heavily damaged wooden houses were about 20% around the K-NET Anamizu and Monzenmachi, Wajima city Shindokei, but almost all the heavily damaged wooden houses were very old ones or stores with large openinngs in the first story. We found no heavily damaged wooden houses around the stations with 6-JMA scale exept for K-NET Wajima. We found no heavily damaged non-wooden buildings around all the stations. Strong ground motions which have various kind of period characteristics were observed in this earthquake. In particular, 1.5-2 sec. dominated recored was observed at JMA Wajima for the first time as the site with building damage data. Correspondence of strong ground motions with damage to buildings can be roughly explained by the 1-2sec. response which the author proposed as the index representing damageability of strong ground motions. However, in the case of JMA Wajima which had 1.5-2 sec. dominant period, we found some difficulty to explain the actual damage to buildings by the index.
