Damage Situation Around the Seismic Stations in the 2018 Hokkaido Eastern Iburi Earthquake and Correspondence of Damage to Buildings with Strong Ground Motions

Abstract

We carried out damage investigation around the seismic stations where high JMA seismic intensity scales were recorded in the 2018 Hokkaido Eastern Iburi Earthquake. Heavily damaged buildings were found around K-NET Mukawa, but no heavily damaged buildings were found around the other seismic stations. We investigated the correspondence of the strong ground motions with damage to buildings. The strong ground motion that was observed in K-NET Mukawa has large 1-1.5 sec. response, the response in the period range of 1-1.5 s, which has close relationship with heavy damage to buildings. Short-period below 1 sec. was dominated and 1-1.5 sec. response was small in the other strong ground motions.