Hadley-Kanamori
Hadley Kanamori 1D model is used for various purposes in SCEC research, and by seismic networks in California.
Contents
SCSN Hadley-Kanamori 1D Model
A text definition of the HK model is given below. SCSN uses a Vp/Vs ratio of 1.73
Top of Layer (km) P-Velocity (km/sec) 0.0 5.5 5.5 6.3 16.0 6.7 32.0 7.8
A recent paper that cites the model and defines the layers.
- Hutton, K., Woessner, J., Hauksson, E. (2010) Earthquake Monitoring in Southern California for Seventy-Seven Years (1932-2008) BSSA, Vol. 100, No. 2, pp423-446, April 2010
SCEC Hadley-Kanamori 1D Model Definition
SCEC uses a modified version of the HK model as a background model in their 3D velocity models. This means that if you query some of the Calfornia CVM's outside their defined coverage region, the CVM will return values from the HK model. In general, CVM tools will use linear interpolate between layers, so material properties returned vary gradually between model layers.
# 1D Velocity Model configuration # # Vp is interpolated between layer n to n+1. # Rho is derived from vp (./src/ucvm/ucvm_model_1d.c) # Vs is derived from Vp and Rho (./src/ucvm/ucvm_model_1d.c) # version=Hadley-Kanamori 1D (CVM-S) # Depth of model in layers num_z=9 # Depth to start of layer (km) depth_vals=1.0, 5.0, 6.0, 10.0, 15.5, 16.5, 22.0, 31.0, 33.0 # Vp at start of layer (km/s) vp_vals=5.0, 5.5, 6.3, 6.3, 6.4, 6.7, 6.75, 6.8, 7.8
The following plot shows the SCEC HK 1D model:
BBP Northridge/Whittier Narrows Model
SCEC provides an alternative LA Basin 1D model. This was defined by R. Graves using average Vp, Vs values for a number of sites in the LA Basin region. This model is often used as a 1D model for Los Angeles region ground motion simulations.
THICKNESS P-VEL S-VEL DENS QP QS 0.0020 1.7000 0.4500 2.0000 45.0000 22.5000 0.0040 1.8000 0.6500 2.1000 65.0000 32.5000 0.0060 1.8000 0.8500 2.1000 85.0000 42.5000 0.0080 1.9000 0.9500 2.1000 95.0000 47.5000 0.0100 2.0000 1.1500 2.2000 115.0000 57.5000 0.0700 2.4000 1.2000 2.2000 120.0000 60.0000 0.2000 2.8000 1.4000 2.3000 140.0000 70.0000 0.2000 3.1000 1.6000 2.4000 160.0000 80.0000 0.2000 3.4000 1.8000 2.4500 180.0000 90.0000 0.3000 3.7000 2.1000 2.5000 210.0000 105.0000 2.0000 4.4000 2.4000 2.6000 240.0000 120.0000 2.0000 5.1000 2.8000 2.7000 280.0000 140.0000 1.0000 5.6000 3.1500 2.7500 315.0000 157.5000 5.0000 6.1500 3.6000 2.8250 360.0000 180.0000 5.0000 6.3200 3.6500 2.8500 365.0000 182.5000 5.0000 6.5500 3.7000 2.9000 370.0000 185.0000 10.0000 6.8000 3.8000 2.9500 380.0000 190.0000 999.0000 7.8000 4.5000 3.2000 450.0000 225.0000
The non-interpolated (step) version of the model looks as follows:
The interpolated version of the model looks as follows:
