Abstract
Large amount of ground motion records has been accumulated at stations of existing K-NET, KiK-net and other observation network systems throughout Japan. They have been utilized in various ways such as deeper understanding of earthquake source and characteristics and wave propagation characteristics, establishment of more precise ground motion attenuation relationships, application to early warning systems, etc. The past attenuation relationships for PGA, PGV, or other intensity measures of ground motion have been established through regression analyses of observed records. They can be easily used for wide range of applications. Shortcomings of the traditional attenuation relationships, however, can only predict the attenuation property of a single intensity measures, not the whole attenuation property of ground motions. It is presented in this paper that a new and easy-to-use selection method of records from ample observed earthquake records inventory (Data-base) is proposed instead of establishing another attenuation relationship.
