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GaoSYKMC CONSULTAM's <br />Dr. Hari 5hz=a. P.R. G.E. <br />22 January 2001 <br />Page 6 <br />to -fill„ the envelope between the median and ae percentile response spectra in the <br />all tbiee period range from' <br />0.0& seeands to 2 seconds, the accelero egmIns WMe <br />.were. scaled up. In particular, to represent the Mw 6.4' To <br />represent <br />scaled io a PHGA of 0.13 Z. rather than a m�ediin WE PHGA of 4.09 g' <br />the Mw 6.7 NICE, the accelerograwere scaled to a PHGA of 0.19 g rather than a <br />median MCE PHGA <br />of g. The aecelemtion response spectra of the time hist®=res <br />selected to represent the Mw 6..7 MCE event on the Gre3t'�latIey blind thrust system are <br />onse spectra of the time histories selected to <br />plotted iu Fig= 2. The acceleration resp sF are lotted in <br />represent the Mw 6.4 NIDE event on the Great Valley blind thrust system p <br />Figure 3. <br />The magnitude Si' synthetic accelemgmm was selected to reps a duration <br />nt e Mw <br />7.9 WE/MCE event on the San Andreas fault. To cotnpen�sat entile response <br />deficiency and to "felt" the envelope between them to 2 seconds, the <br />spectra in the period range from approximately 0 ® � <br />Magnitude 8+ synthetic accelerogram was scaled to a PHGA of 0.10 g raOW than the <br />ectrum of the' Magnitude $* <br />median 11WE PHGA of 0.05 g. sen g MPEIMCE M 4 eventon the San Ands <br />synthetic accelemgam rePre <br />fault syst= is plotted in Figure 4. <br />CONCLUSIONS <br />This <br />lemr report <br />presents <br />R_.1 SM&Unc <br />..1 <br />tu exposure evaluation for the Forward <br />sour= capable of generating strang Wound xpotions at the site were evaluaW based <br />upon the best available infor=tion on regional seismicity and. seismic geoloff- The <br />T+ <br />M=imumCredible- <br />rthqxu*e (MCE) and Uhxirnwn Probable Bathquake (E) <br />moment mapitudes and sitc.to-source distance pairs <br />were etublished on the basis of published -data- f <br />e Peak Horizontal Ground <br />shaking M <br />hypothetical bedrock outcrop sit the geometric.ce . nter of t�e site was establisbed for . each <br />p: wRrnca W?wMCAV1FWOFORWAPJ M-HAZDCC <br />0 <br />g•d 9QZL-TQ9-®TS §ui.reaut2u3 szrnal WHEE:6 1002 S1 sew <br />5T/L0 30Vd S31VI00SSV DIDOI039 ZELSEBES06 EO:ZT TOOZ/TE/L0 <br />