Damage Investigation of Surroundings of the Seismic Station at Miyagi in the 2011 off the Pacific coast of Tohoku 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 2011 off the Pacific Coast of Tohoku Earthquake and reported damage situation in Miyagi. We found some heavily damaged buildings around some stations, such as JMA Osaki-Shi-Furukawamikka-Machi, and some minor damage such as small damage to the wall or damaged roof tiles, but we found few heavy damage to buildings around most the seismic stations in spite of large JMA seismic scales. We investigated properties of strong ground motions and found very short period below 0.5 second was dominated in most strong ground motions and the 1-1.5 second response which has close relationship with heavy damage to buildings was low.