Study 16.9 Velocity Plots

s001

s001 is one of the overlapping sites, near Ventura. The volume is 2400 x 4400 x 288 grid points (420 x 770 x 50.4 km).

These plots were constructed using CCA, CVM-S4.26, and the 1D model.

Horizontal Plots

Horizontal cross-section, depth=0 km

Horizontal cross-section, depth=1.05 km

Horizontal cross-section, depth=9.975 km

Horizontal cross-section, depth=25.025 km

Horizontal cross-section, depth=50.225 km

Vertical Plots

Here's a plot showing where the cross sections come from:

Cross-sections parallel to the Y (long) axis:

50 Y vertical cross-section, NW/SE, 8.75 km from SW boundary

1200 Y vertical cross-section, NW/SE, 210 km from SW boundary

2350 Y vertical cross-section, NW/SE, 411.25 km from SW boundary

Cross-sections parallel to the X (short) axis:

475 X vertical cross-section, SW/NE, 83.125 km from NW boundary

1575 X vertical cross-section, SW/NE, 275.625 km from NW boundary

2725 X vertical cross-section, SW/NE, 476.875 km from NW boundary

3875 X vertical cross-section, SW/NE, 678.125 km from NW boundary

s1252

s1252 is a site in the mountains near the San Andreas and just far enough north to include northern San Andreas events within the 200 km cutoff.

These plots were generated using CCA, USGS Bay Area, and CVM-S4.26. We generated plots both without and with smoothing.

Horizontal Plots

No smoothing	Horizontal cross-section, depth=0 km	Horizontal cross-section, depth=1.05 km	Horizontal cross-section, depth=9.975 km	Horizontal cross-section, depth=25.025 km	Horizontal cross-section, depth=50.225 km
Smoothing	Horizontal cross-section, depth=0 km	Horizontal cross-section, depth=1.05 km	Horizontal cross-section, depth=9.975 km	Horizontal cross-section, depth=25.025 km	Horizontal cross-section, depth=50.225 km

Cutoff Plots

To verify that the cutoffs are being correctly applied (Vs=900 m/s, Vp=rho=3060), we created the following plots.

Vp, horizontal cross-section, depth=0 km

Vs, horizontal cross-section, depth=0 km

rho, horizontal cross-section, depth=0 km

Since rho is getting washed out, we produced the below series of plots at a variety of depths with a very low cutoff (Vs=100 m/s, Vp=rho=340), to see what the models look like without the above cutoffs.

Vp	Vs	Density
0 km depth	Vp, horizontal cross-section, depth=0 km	Vs, horizontal cross-section, depth=0 km	Rho, horizontal cross-section, depth=0 km
1.05 km depth	Vp, horizontal cross-section, depth=1.05 km	Vs, horizontal cross-section, depth=1.05 km	Rho, horizontal cross-section, depth=1.05 km
9.975 km depth	Vp, horizontal cross-section, depth=9.975 km	Vs, horizontal cross-section, depth=9.975 km	Rho, horizontal cross-section, depth=9.975 km
25.025 km depth	Vp, horizontal cross-section, depth=25.025 km	Vs, horizontal cross-section, depth=25.025 km	Rho, horizontal cross-section, depth=25.025 km
50.225 km depth	File:S1252 CCA06 depth247 nocutoff horiz slice vp.png Vp, horizontal cross-section, depth=50.225 km	File:S1252 CCA06 depth247 nocutoff horiz slice vs.png Vs, horizontal cross-section, depth=50.225 km	File:S1252 CCA06 depth247 nocutoff horiz slice rho.png Rho, horizontal cross-section, depth=50.225 km

Vertical Plots

Here's a plot showing where the cross sections come from:

Cross-sections parallel to the Y (long) axis:

No smoothing	50 Y vertical cross-section, NW/SE, 8.75 km from SW boundary	1200 Y vertical cross-section, NW/SE, 210 km from SW boundary	2350 Y vertical cross-section, NW/SE, 411.25 km from SW boundary
Smoothing	50 Y vertical cross-section, NW/SE, 8.75 km from SW boundary	1200 Y vertical cross-section, NW/SE, 210 km from SW boundary	2350 Y vertical cross-section, NW/SE, 411.25 km from SW boundary

Cross-sections parallel to the X (short) axis:

No smoothing	445 X vertical cross-section, SW/NE, 83.125 km from NW boundary	1595 X vertical cross-section, SW/NE, 275.625 km from NW boundary	2745 X vertical cross-section, SW/NE, 476.875 km from NW boundary	3895 X vertical cross-section, SW/NE, 678.125 km from NW boundary	5045 X vertical cross-section, SW/NE, 678.125 km from NW boundary	6195 X vertical cross-section, SW/NE, 678.125 km from NW boundary
Smoothing	445 X vertical cross-section, SW/NE, 83.125 km from NW boundary	1595 X vertical cross-section, SW/NE, 275.625 km from NW boundary	2745 X vertical cross-section, SW/NE, 476.875 km from NW boundary	3895 X vertical cross-section, SW/NE, 678.125 km from NW boundary	5045 X vertical cross-section, SW/NE, 678.125 km from NW boundary	6195 X vertical cross-section, SW/NE, 678.125 km from NW boundary