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PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Susumu OHONO, Katsuya TAKAHASHI
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EVALUATION OF STRONG-MOTION ATTENUATION RELATION USING NEAR-SOURCE DATA IN CALIFORNIA
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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).
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