Vertical CVM Profiles - Revision history

Maechlin at 17:51, 19 July 2016

2016-07-19T17:51:06Z

Maechlin: /* CVM */

2016-07-19T17:46:34Z

CVM

Maechlin at 17:24, 19 July 2016

2016-07-19T17:24:10Z

Maechlin at 00:56, 19 July 2016

2016-07-19T00:56:25Z

Maechlin at 00:21, 19 July 2016

2016-07-19T00:21:20Z

Maechlin at 23:45, 18 July 2016

2016-07-18T23:45:53Z

Maechlin at 23:43, 18 July 2016

2016-07-18T23:43:56Z

Maechlin at 23:37, 18 July 2016

2016-07-18T23:37:49Z

Maechlin: /* Results Table */

2016-07-18T23:35:25Z

Results Table

Maechlin at 23:34, 18 July 2016

2016-07-18T23:34:29Z

@@ Line 23: / Line 23: @@
 For the profiles below, we configured UCVM cvms5 model. We used cvms5 in default mode, which includes the addition of a Vs30-based geotechnical layer.  We queried the cvms5 model for material properties starting at the surface, and at 200m steps. This UCVM model will return low Vs values in some regions, based on geotechnical information derived from Vs30 information about the region. The GTL implementation defines low Vs value (less than 200m/s in some areas), and smoothly tapers those values in the top 300 meters to meet the Vs values provided by the tomography-defined velocity model.
-The UCVM software also provides an optional Vs30-based GTL. However, that Vs30-based GTL is not used for these plots.
+Details about the Ely-based GTL is posted [http://earth.usc.edu/~gely/vs30gtl/ here].
 *Common CVM Name: CVM-S4.26
@@ Line 65: / Line 65: @@
 == Related Entries ==
 *[[UCVM]]

@@ Line 21: / Line 21: @@
 The profiles below were extracted from a model registered into UCVM that we call CVM-S4.26. In UCVM terms, the user queries this model using model name cvms5.
-For the profiles below, we configured UCVM cvmsi model, and we queried the points at 200m steps. This UCVM model will return low Vs values in some reasons, based on geotechnical information encoded into the original CVM-S4 model. This model will provide Vs values down to Vs 200 m/s in some areas.
+For the profiles below, we configured UCVM cvms5 model. We used cvms5 in default mode, which includes the addition of a Vs30-based geotechnical layer.  We queried the cvms5 model for material properties starting at the surface, and at 200m steps. This UCVM model will return low Vs values in some regions, based on geotechnical information derived from Vs30 information about the region. The GTL implementation defines low Vs value (less than 200m/s in some areas), and smoothly tapers those values in the top 300 meters to meet the Vs values provided by the tomography-defined velocity model.
 The UCVM software also provides an optional Vs30-based GTL. However, that Vs30-based GTL is not used for these plots.
-*Common Name: CVM-S4.26-M01
+*Common CVM Name: CVM-S4.26
-*Model Name: cvmsi
+*UCVM Name for CVM: cvms5
-*UCVM Name: cvmsi
+*Description: This is a CVM produced by Po Chen and En-Jui Lee. The starting model was a slightly modified version of CVM-S4. One of the modifications made to create the starting model was to put a min Vs of 1000 m/s floor into their starting model because their simulations were at low frequencies. During the tomography iterations which improved the velocity models, they allowed the tomography to lower those min Vs, but the lowest values in the cvms tomography model are Min Vp: 1250.00, Min Vs: 825.00, Min Rho: 2000.00. This model is delivered on a coarse 3D grid of 1536 x 992 x 100 cells with a grid spacing of 500 m. UCVM returns values from this mesh using trilinear interpolation to provide intermediate values between mesh points. UCVM adds a Vs30-based GTL using the Ely method. You must turn off this GTL to access the actual tomography-derived model.
 == Results Table ==

@@ Line 17: / Line 17: @@
 == CVM ==
-The names of SCEC CVMs can be confusing to users. One reason is that the CVM names used by the scientists do not match the names used by the UCVM software.
+The names of SCEC CVMs can be confusing to users. One reason is that the CVM names used by SCEC scientists often do not match the names used by the UCVM software. The two groups may refer to the same velocity model using different names. For this reason, we often describe a CVM Common Name: (name often used by SCEC Scientists) and the CVM UCVM Name: (the name used by the UCVM software).
-The profiles below were extracted from a model registered into UCVM that we call CVM-S4.26-M01. In UCVM terms, the user queries this model using model name cvmsi.
+The profiles below were extracted from a model registered into UCVM that we call CVM-S4.26. In UCVM terms, the user queries this model using model name cvms5.
 For the profiles below, we configured UCVM cvmsi model, and we queried the points at 200m steps. This UCVM model will return low Vs values in some reasons, based on geotechnical information encoded into the original CVM-S4 model. This model will provide Vs values down to Vs 200 m/s in some areas.

@@ Line 17: / Line 17: @@
 == CVM ==
-There is a significant amount of confusion regarding the names of the SCEC CVMs. One of the issues is that the CVM names used by the scientists do not match the names used by the UCVM software.
+The names of SCEC CVMs can be confusing to users. One reason is that the CVM names used by the scientists do not match the names used by the UCVM software.
-The profiles below were extracted from a model registered into UCVM. In UCVM terms, the user queries this model using model name cvms5. For the profiles below, we configured UCVM cvms5 model with GTL off, and we queried the points at 200m steps. Since this is the tomography-based CVM, and the optional Vs30 derived GTL is off, we expect not Vs values below 900m/s at any site in the region.
+The profiles below were extracted from a model registered into UCVM that we call CVM-S4.26-M01. In UCVM terms, the user queries this model using model name cvmsi.
 *Common Name: CVM-S4.26-M01

@@ Line 21: / Line 21: @@
 The profiles below were extracted from a model registered into UCVM. In UCVM terms, the user queries this model using model name cvms5. For the profiles below, we configured UCVM cvms5 model with GTL off, and we queried the points at 200m steps. Since this is the tomography-based CVM, and the optional Vs30 derived GTL is off, we expect not Vs values below 900m/s at any site in the region.
-Common Name: CVM-S4.26
+*Common Name: CVM-S4.26-M01
-Model Name: cvms5
+*Model Name: cvmsi
-UCVM Name: cvms5
+*UCVM Name: cvmsi
-Description: This is a CVM produced by Po Chen and En-Jui Lee. The starting model was a modified version of CVM-S4. One of their modifications was to put a min Vs of 1000 m/s floor into their starting model because their simulations were at low frequencies. They allowed the tomography to lower those min Vs, but the lowest values in this model are Min Vp: 1250.00, Min Vs: 825.00, Min Rho: 2000.00. This model is delivered on a coarse 3D grid of 1536 x 992 x 100 cells with a grid spacing of 500 m. UCVM returns values from this mesh using trilinear interpolation to provide intermediate values between mesh points. UCVM adds a Vs30-based GTL using the Ely method. You must turn off this GTL to access the actual tomography-derived model.
+*Description: cvmsi is a model that combines Po Chen and En-Jui Lee’s tomography-based improvements to CVM-S4, and uses an SCEC developed algorithm to preserve some of the rule-based GTL that was in the original CVM-S4. This model has been used to run wave propagation simulations at higher frequencies, because it will return some low GTL velocities when queried for material properties in the top 300 meters. This model is delivered on a coarse 3D grid of 1536 x 992 x 100 cells with a grid spacing of 500 m. UCVM returns values from this mesh using trilinear interpolation to provide intermediate values between mesh points below 350 meters. Above 350 meters, UCVM will call the original CVM-S4 to get material properties, in some cases. The rules for the GTL layer in this model were defined by SCEC research group, and are documented in the UCVM software source code, and with some entries on a SCEC wiki.
 == Results Table ==

← Older revision		Revision as of 23:43, 18 July 2016
Line 17:		Line 17:

	== CVM ==		== CVM ==
		+	There is a significant amount of confusion regarding the names of the SCEC CVMs. One of the issues is that the CVM names used by the scientists do not match the names used by the UCVM software.

		+	The profiles below were extracted from a model registered into UCVM. In UCVM terms, the user queries this model using model name cvms5. For the profiles below, we configured UCVM cvms5 model with GTL off, and we queried the points at 200m steps. Since this is the tomography-based CVM, and the optional Vs30 derived GTL is off, we expect not Vs values below 900m/s at any site in the region.
		+
		+	Common Name: CVM-S4.26
		+	Model Name: cvms5
		+	UCVM Name: cvms5
		+	Description: This is a CVM produced by Po Chen and En-Jui Lee. The starting model was a modified version of CVM-S4. One of their modifications was to put a min Vs of 1000 m/s floor into their starting model because their simulations were at low frequencies. They allowed the tomography to lower those min Vs, but the lowest values in this model are Min Vp: 1250.00, Min Vs: 825.00, Min Rho: 2000.00. This model is delivered on a coarse 3D grid of 1536 x 992 x 100 cells with a grid spacing of 500 m. UCVM returns values from this mesh using trilinear interpolation to provide intermediate values between mesh points. UCVM adds a Vs30-based GTL using the Ely method. You must turn off this GTL to access the actual tomography-derived model.

	== Results Table ==		== Results Table ==

@@ Line 34: / Line 34: @@
 |-
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_vp.png Vp]
-I[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_vp.png Vp]
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_vp.png Vp]
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_vp.png Vp]
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_vp.png Vp]
@@ Line 43: / Line 43: @@
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_vs.png Vs]
 |-
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_density.png rho]
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_density.png rho]
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_density.png rho]
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_density.png rho]
 |}
 == Related Entries ==
 *[[UCVM]]
 *[[]]

@@ Line 20: / Line 20: @@
 == Results Table ==
 {| class="wikitable"
 |+ Southern California Velocity Profiles
@@ Line 44: / Line 42: @@
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_vs.png Vs]
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_vs.png Vs]
 |}
 == Lat/Long of Locations ==

@@ Line 40: / Line 40: @@
 |[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_vp.png Vp]
 |-
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_vs.png Vs]
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_vs.png Vs]
- |}
+|[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_vs.png Vs]
@@ Line 50: / Line 52: @@
+*
+*
-*[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_vs.png Vs]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_density.png rho]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-116.335_34.829_all.txt Txt Data]
@@ Line 56: / Line 58: @@
+*
+*
-*[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_vs.png Vs]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_density.png rho]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.68_33.998_all.txt Txt Data]
@@ Line 63: / Line 65: @@
+*
-*[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_vs.png Vs]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_density.png rho]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-117.316_34.093_all.txt Txt Data]
@@ Line 70: / Line 72: @@
+*
+*
-*[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_vs.png Vs]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_density.png rho]
 *[http://hypocenter.usc.edu/research/UCVM/depth_profiles/cvms426_-118.488_35.305_all.txt Txt Data]