CyberShake 1D Model

The following plots show a 1D velocity model that we will use for our CyberShake 14.2 Production run. This is a layer model. We will linearly interpolate the layers with this rule: Vp,Vs, and rho values are linearly interpolated between layer n to n+1. We decided to linearly interpolate this model to avoid issues with the step function and to more closely match the average.

Linearly Interpolated BBP 1D model with 1km Moho Velocity Profiles

Below are plots showing Vp, Vs, and rho from the selected 1D model.

Linearly Interpolated Broadband Platform 1D model with 1km Moho to 60km Depth	Linearly Interpolated Broadband Platform 1D model to 5000m Depth

Linearly Interpolated BBP 1D model with 1km Moho Overlay Plots

Below are plots showing 1D profiles extracted from CVM-S4 for the 386 CyberShake sites in the study, with the selected 1D model plotted on top of this collection of profiles.

Z1.0 and Z2.5 Values

The Z1.0 depth is 22.5 meters.
The Z2.5 depth is 3500 meters.

Numerical Description of BBP LA Basin Model with 1km Moho Layers

*Layer Number - Depth to Bottom of Layer (km) - Layer Thickness (km) - Vp (km/s) - Vs(km/s) - rho() - Qp - Qs
# 0.002   0.0020   1.7000   0.4500   2.0000    45.00    22.50
# 0.006   0.0040   1.8000   0.6500   2.1000    65.00    32.50
# 0.012   0.0060   1.8000   0.8500   2.1000    85.00    42.50
# 0.020   0.0080   1.9000   0.9500   2.1000    95.00    47.50
# 0.030   0.0100   2.0000   1.1500   2.2000   115.00    57.50
# 0.100   0.0700   2.4000   1.2000   2.2000   120.00    60.00
# 0.300   0.2000   2.8000   1.4000   2.3000   140.00    70.00
# 0.500   0.2000   3.1000   1.6000   2.4000   160.00    80.00
# 0.700   0.2000   3.4000   1.8000   2.4500   180.00    90.00
# 1.000   0.3000   3.7000   2.1000   2.5000   210.00   105.00
# 3.000   2.0000   4.4000   2.4000   2.6000   240.00   120.00
# 5.000   2.0000   5.1000   2.8000   2.7000   280.00   140.00
# 6.000   1.0000   5.6000   3.1500   2.7500   315.00   157.50
#11.000   5.0000   6.1500   3.6000   2.8250   360.00   180.00
# 16.000   5.0000   6.3200   3.6500   2.8500   365.00   182.50
# 21.000   5.0000   6.5500   3.7000   2.9000   370.00   185.00
# 30.000   9.0000   6.8000   3.8000   2.9500   380.00   190.00
# 31.000   1.0000   7.8000   4.5000   3.2000   450.00   225.00
# 1030.000   999.0000   7.8000   4.5000   3.2000   450.00   225.00

Related Entries

• 1D Model Development Additional details on the various 1D models that were considered
• UCVM