NC1D

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This page documents the NC1D velocity model, created as part of the preparations for Study 24.6.

Summary

This model was created by creating a 1D representation of the (unmodified) Sierra gabbro region in SFCVM v22.1. It is intended for use in the northeastern parts of California, a region covered by few CVMs. It was created by extracting a 1D profile from the Sierra gabbro region and then manually creating a 1D model which closely approximates this profile. Note that the Sierra gabbro region as specified in SFCVM v22.1 has high near surface velocities (around 3500 m/s), so this is reflected in NC1D as well.

Contents

A UCVM-formatted configuration file specifying this model is available here. The layers specified in the model are:

Layer thickness (km) Vp (km/s) Vs(km/s) Density (gm/cm3) Qp Qs
8.8990 5.9000 3.5025 2.8797 350.2500 175.1250
0.0010 5.9000 3.5025 2.8797 350.2500 175.1250
5.4200 6.2024 3.6414 2.9335 364.1400 182.0700
9.5200 6.7352 3.8763 3.0381 387.6300 193.8150
6.1600 7.0800 4.0367 3.1116 403.6700 201.8350
9.6000 7.6173 4.3354 3.2327 433.5400 216.7700
0.2700 7.7511 4.4031 3.2840 440.3100 220.1550
0.2650 7.7791 4.4227 3.3000 442.2700 221.1350
4.8650 7.7796 4.4256 3.3000 442.5600 221.2800
0.0010 7.8257 4.4593 3.2153 445.9300 222.9650
0.9990 7.8255 4.4587 3.2150 445.8700 222.9350
3.0000 7.8326 4.4644 3.2180 446.4400 223.2200
999.00 7.9200 4.5740 3.1160 457.4000 228.7000

Plots

Vertical profile of NC1D model.

1D vertical profile from NC1D model.

Horizontal cross-sections. The NC1D model is used in the northeastern portion of the volume; you can see how it is similar to the Sierra gabbro region.

Horizontal cross-section, 0m depth.
Horizontal cross-section, 80m depth.
Horizontal cross-section, 800m depth.
Horizontal cross-section, 2000m depth.
Horizontal cross-section, 10000m depth.