SEGJ Technical Conference


Ground type classification for strong motion evaluation based on the characteristics of Phase-Velocity Curves estimated by Microtremor Array Measurements


Abstract
In NIED, in order to create and improve ground model for Kanto, Tokai and Kumamoto, a total of about 25,000 points are formed at miniature arrays and irregular arrays Observations and large array observations have been carried out at about 1,000 places at about 5 km intervals. Amplification of earthquake ground motions, structure model of share wave velocity (S wave velocity, referenced to as Vs) in the shallow part underground which is greatly affected by building and human damage is made. From the dense data acquired, on new correlation between boring data on the correlation between the phase velocity and the geomorphological classification and geological composition of the ground, We were able to organize useful information for creating the ground model.