�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 9-1Šª ”N�F 1994”N •Å�F 625-630•Å ’˜ŽÒ�i˜a�j�F ‘å–ì�@�W�C�@�‚‹´�@�Ž–ç ƒ^ƒCƒgƒ‹�i˜a�j�F •Ä�‘ƒJƒŠƒtƒHƒ‹ƒjƒA�B‹­�kŠÏ‘ª‹L˜^‚ð—p‚¢‚½’n�k“®ƒXƒyƒNƒgƒ‹•]‰¿ �´˜^�i˜a�j�F
- ƒL�[ƒ��[ƒh�i˜a�j�F - Œf�ÚŽGŽ��i‰p�j�F PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒ�i‰p�j�F Susumu OHONO, Katsuya TAKAHASHI ƒ^ƒCƒgƒ‹�i‰p�j�F EVALUATION OF STRONG-MOTION ATTENUATION RELATION USING NEAR-SOURCE DATA IN CALIFORNIA �´˜^�i‰p�j�F
For 496 horizontal components of 17 major earthquakes occurred in California, from 1940 to 1992, magnitudes from 5.0 to 7.5, a new attenuation relation of 5%-damping response spectrum is estimated by Joyner and Boore (1993) maximum likelihood 2-step regression analysis. the estimated attenuation relation for maximum acceleration (A�¡) is: logA�¡ = 0.318Mw -logXeq- 0.00164Xeq+1.597, where Mw is moment magnitude. Xeq is Equivalent Hypocentral Distance: a distance between site and virtual point source that radiates the same energy as does a finite-sized fault (Ohno et al., 1993). ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W