|Effects of the Evaluation Variance of the Attenuation
Relationship on Seismic Hazards
|Yasuo UCHIYAMA *1 and
Shigehiro SAKAMOTO *2
|In the seismic hazard analysis, the exceedance
probability of specified earthquake ground motion intensity at the object site
in a given term is evaluated, where the ground motion intensity of specified
exceedance probability can also be predicted. In the analysis, attenuation
relations are often employed to predict ground motions. Recent studies to evaluate
long-term seismic hazard indicate that the standard error of attenuation relation
is an important parameter to predict ground motion of low exceedance probability.
The authors applied amplitude-dependent and distance-dependent variance of
attenuation relation to seismic hazard analysis. Evaluated peak velocities
in near source region are smaller than those evaluated with constant variance.
||seismic hazard, variance of attenuation
relationship, peak velocity