Study 18.5 Velocity Model Comparisons - Revision history

Scottcal: /* Horizontal */

2018-10-11T15:11:20Z

Horizontal

← Older revision		Revision as of 15:11, 11 October 2018
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	{\|		{\|
	\| [[File:s4050_horiz_slice_0km_vs.png\|thumb\|400px\|surface slice]]		\| [[File:s4050_horiz_slice_0km_vs.png\|thumb\|400px\|surface slice]]
	\| [[File:s4050_horiz_slice_500m_vs.png\|thumb\|~~200px~~\|depth of 500m]]		\| [[File:s4050_horiz_slice_500m_vs.png\|thumb\|400px\|depth of 500m]]
	\|}		\|}

Scottcal: /* Cross-sections from production velocity mesh */

2018-10-11T15:04:37Z

Cross-sections from production velocity mesh

← Older revision		Revision as of 15:04, 11 October 2018
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	{\|		{\|
	\| [[File:~~s4050_vert_slice_parallelY_1674_vs~~.png\|thumb\|400px\|X=1680]]		\| [[File:s4050_vert_slice_parallelY_1680_vs.png\|thumb\|400px\|X=1680]]
	\|}		\|}

Scottcal: /* Cross-sections from production velocity mesh */

2018-10-11T15:04:23Z

Cross-sections from production velocity mesh

← Older revision		Revision as of 15:04, 11 October 2018
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	{\|		{\|
	\| [[File:s4050_vert_slice_parallelY_1674_vs.png\|thumb\|400px\|X=~~1674~~]]		\| [[File:s4050_vert_slice_parallelY_1674_vs.png\|thumb\|400px\|X=1680]]
	\|}		\|}

Scottcal: /* Cross-sections from production velocity mesh */

2018-10-10T20:46:38Z

Cross-sections from production velocity mesh

← Older revision		Revision as of 20:46, 10 October 2018
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	{\|		{\|
	\| [[File:s4050_vert_slice_parallelX_2800_vs.png\|thumb\|~~400px~~\|Y=2800]]		\| [[File:s4050_vert_slice_parallelX_2800_vs.png\|thumb\|200px\|Y=2800]]
	\| [[File:s4050_vert_slice_parallelX_3800_vs.png\|thumb\|~~400px~~\|Y=3800]]		\| [[File:s4050_vert_slice_parallelX_3800_vs.png\|thumb\|200px\|Y=3800]]
	\| [[File:s4050_vert_slice_parallelX_4800_vs.png\|thumb\|~~400px~~\|Y=4800]]		\| [[File:s4050_vert_slice_parallelX_4800_vs.png\|thumb\|200px\|Y=4800]]
	\| [[File:s4050_vert_slice_parallelX_5800_vs.png\|thumb\|~~400px~~\|Y=5800]]		\| [[File:s4050_vert_slice_parallelX_5800_vs.png\|thumb\|200px\|Y=5800]]
	\| [[File:s4050_vert_slice_parallelX_6800_vs.png\|thumb\|~~400px~~\|Y=6800]]		\| [[File:s4050_vert_slice_parallelX_6800_vs.png\|thumb\|200px\|Y=6800]]
	\| [[File:s4050_vert_slice_parallelX_7800_vs.png\|thumb\|~~400px~~\|Y=7800]]		\| [[File:s4050_vert_slice_parallelX_7800_vs.png\|thumb\|200px\|Y=7800]]
	\|}		\|}

Scottcal at 20:46, 10 October 2018

2018-10-10T20:46:16Z

@@ Line 234: / Line 234: @@
 | [[File:s975_vert_slice_1500y_vs.png|thumb|200px|y index=1500]]
 | [[File:s975_vert_slice_3000y_vs.png|thumb|200px|y index=3000]]
 |}

Scottcal: /* Original Vs cross-sections */

2018-10-10T20:37:28Z

Original Vs cross-sections

← Older revision		Revision as of 20:37, 10 October 2018
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	=== Original Vs cross-sections ===		=== Original Vs cross-sections (no GTL) ===

	We have extracted horizontal cross-sections at 0 km, 0.1 km, 1 km, and 10 km. The 0 km cross-section also indicates the vertical cross-section locations.		We have extracted horizontal cross-sections at 0 km, 0.1 km, 1 km, and 10 km. The 0 km cross-section also indicates the vertical cross-section locations.

Maechlin at 07:44, 24 May 2018

2018-05-24T07:44:44Z

@@ Line 83: / Line 83: @@
 </pre>
 == Initial CVM Version ==
 For Study 18.5, the first velocity model we examined used the following order of precedence:

Maechlin: /* Algorithm for calculating density */

2018-05-24T07:38:52Z

Algorithm for calculating density

← Older revision		Revision as of 07:38, 24 May 2018
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	Based on initial simulations and CVM plot evaluations, we expect to build the CyberShake NorCal Study 18.5 by tiling CVM's in this order USGS Bay Area model (cencal), CCA06 with Ely Geotechnical Layer (cca), CVM-S4.26.M01 (cvmsi). Smoothing will be done on the mesh along horizontal interfaces for a distance of 20km on each side. The smoothing is done using a method that will be described here. Plots of the resulting models are listed below:		Based on initial simulations and CVM plot evaluations, we expect to build the CyberShake NorCal Study 18.5 by tiling CVM's in this order USGS Bay Area model (cencal), CCA06 with Ely Geotechnical Layer (cca), CVM-S4.26.M01 (cvmsi). Smoothing will be done on the mesh along horizontal interfaces for a distance of 20km on each side. The smoothing is done using a method that will be described here. Plots of the resulting models are listed below:

	== Algorithm for calculating density ==		== CVM-S4.26 Algorithm for calculating density ==
	CVM-S4.26 returns density based on Vs values using the following relationship:		CVM-S4.26 returns density based on Vs values using the following relationship:
	<pre>		<pre>
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	p0 = 1.2948318548300342		p0 = 1.2948318548300342

	~~# Density scaling parameters~~
	~~p5 = -0.0024189659303912917~~
	~~p4 = 0.015600987888334450~~
	~~p3 = 0.051962399479341816~~
	~~p2 = -0.51231936640441489~~
	~~p1 = 1.2550758337054457~~
	~~p0 = 1.2948318548300342~~
	</pre>		</pre>

	in ucvm_utils		== Density Calculation for CCA ==
			Density is provided in a third data file (vp, vs, rho) but formula used to calculate is not known.
			Likely to be based on code in ucvm_utils.c, which is based on vp

	<pre>		<pre>
	/* Density derived from Vp via Nafe-Drake curve, Brocher (2005) eqn 1. */		/* Density derived from Vp via Nafe-Drake curve, Brocher (2005) eqn 1. */
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	}		}

			== Convert Vs to Vp ==
	/* Vp derived from Vs via Brocher (2005) eqn 9. */		/* Vp derived from Vs via Brocher (2005) eqn 9. */
	double ucvm_brocher_vp(double vs)		double ucvm_brocher_vp(double vs)

Maechlin: /* Algorithm for calculating density */

2018-05-24T07:35:09Z

Algorithm for calculating density

@@ Line 54: / Line 54: @@
 p1 = 1.2550758337054457
 p0 = 1.2948318548300342
 </pre>

Maechlin: /* Algorithm for calculating density */

2018-05-24T07:24:40Z

Algorithm for calculating density

← Older revision		Revision as of 07:24, 24 May 2018
Line 47:		Line 47:
	p0 = 1.2948318548300342		p0 = 1.2948318548300342

			# Density scaling parameters
			p5 = -0.0024189659303912917
			p4 = 0.015600987888334450
			p3 = 0.051962399479341816
			p2 = -0.51231936640441489
			p1 = 1.2550758337054457
			p0 = 1.2948318548300342
	</pre>		</pre>

← Older revision		Revision as of 20:46, 10 October 2018
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	{\|		{\|
	\| [[File:s4050_vert_slice_parallelX_2800_vs.png\|thumb\|~~400px~~\|Y=2800]]		\| [[File:s4050_vert_slice_parallelX_2800_vs.png\|thumb\|200px\|Y=2800]]
	\| [[File:s4050_vert_slice_parallelX_3800_vs.png\|thumb\|~~400px~~\|Y=3800]]		\| [[File:s4050_vert_slice_parallelX_3800_vs.png\|thumb\|200px\|Y=3800]]
	\| [[File:s4050_vert_slice_parallelX_4800_vs.png\|thumb\|~~400px~~\|Y=4800]]		\| [[File:s4050_vert_slice_parallelX_4800_vs.png\|thumb\|200px\|Y=4800]]
	\| [[File:s4050_vert_slice_parallelX_5800_vs.png\|thumb\|~~400px~~\|Y=5800]]		\| [[File:s4050_vert_slice_parallelX_5800_vs.png\|thumb\|200px\|Y=5800]]
	\| [[File:s4050_vert_slice_parallelX_6800_vs.png\|thumb\|~~400px~~\|Y=6800]]		\| [[File:s4050_vert_slice_parallelX_6800_vs.png\|thumb\|200px\|Y=6800]]
	\| [[File:s4050_vert_slice_parallelX_7800_vs.png\|thumb\|~~400px~~\|Y=7800]]		\| [[File:s4050_vert_slice_parallelX_7800_vs.png\|thumb\|200px\|Y=7800]]
	\|}		\|}