CyberShake 1.2

CyberShake 1.2 introduces the use of CyberShake hazard curves using CVM-H v11.2. This requires recalculation of the SGTs.

CyberShake 1.1 introduced a second generation rupture generator to the CyberShake calculation. Now, when we compare CyberShake hazard curves to one another, we must define both the CVM used (CVM-S4 or CVM-H), and which rupture set was used (CyberShake 1.0 or CyberShake 1.1).

The following curves compare CyberShake hazard curves that both use the CyberShake 1.1 rupture set. The differences between the curves are attributed to only the different CVM's used.

Dual Comparison Results

black = CVM-H curve

gray = CVM-4 comparison curve

blue = Campbell & Borzorgnia (2008)

green = Boore & Atkinson (2008)

yellow = Chiou & Youngs (2008)

cyan = Abrahamson & Silva (2008)

Site	Run ID	Rupture Variation	3s SA curve	Comparison curve with CVM-4
USC	778	4
WNGC	781	4
SBSM	782	4
MBRD	783	4
PACI	784	4
PAS	785	4
STNI	786	4

Quad Comparison Results

black with circles = CVM-4 curve, old rupture variations

gray with circles = CVM-4 curve, new rupture variations

gray with triangles = CVM-H curve, old rupture variations

gray line = CVM-H curve, new rupture variations

blue = Campbell & Borzorgnia (2008)

green = Boore & Atkinson (2008)

yellow = Chiou & Youngs (2008)

cyan = Abrahamson & Silva (2008)

Site	Run IDs	Comparison curve
s758 (near San Onofre)	576, 789, 795, 788