CyberShake Study 15.12 - Revision history

Scottcal: /* Vs values v3.0 */

2020-07-14T13:45:46Z

Vs values v3.0

← Older revision		Revision as of 13:45, 14 July 2020
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	Vs5H = travel time averaged Vs computed from CVM in 1 meter increments down to a depth of 5*H		Vs5H = travel time averaged Vs computed from CVM in 1 meter increments down to a depth of 5*H

	VsD5H = discrete travel time averaged Vs computed from 3D velocity mesh used in the SGT calculation over the upper 5 grid points		VsD5H = discrete travel time averaged Vs computed from 3D velocity mesh used in the SGT calculation over the upper 5 grid points

Scottcal: /* Sample Seismogram */

2018-03-02T18:08:29Z

Sample Seismogram

← Older revision		Revision as of 18:08, 2 March 2018
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	[[File:PAS_s273_r66_rv34_3878v4266_acc.png]]		[[File:PAS_s273_r66_rv34_3878v4266_acc.png]]

			Here is a comparison of the spectral response results for the two above events, for the 10 Hz run.

			[[File:PAS_s273_r69v50_vs_r66v34_psa.png]]

	== Deterministic Site Amplification ==		== Deterministic Site Amplification ==

Scottcal: /* Sample Seismogram */

2018-02-25T05:27:17Z

Sample Seismogram

← Older revision		Revision as of 05:27, 25 February 2018
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	[[File:PAS_s273_r66_rv34_3878v4266.png]]		[[File:PAS_s273_r66_rv34_3878v4266.png]]

			[[File:PAS_s273_r66_rv34_3878v4266_acc.png]]

	== Deterministic Site Amplification ==		== Deterministic Site Amplification ==

Scottcal: /* Sample Seismogram */

2018-02-24T03:49:50Z

Sample Seismogram

← Older revision		Revision as of 03:49, 24 February 2018
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	[[File:PAS_s273_r69_rv50_3878v4266_accl.png]]		[[File:PAS_s273_r69_rv50_3878v4266_accl.png]]

			Below is a seismogram for PAS, source 273, rupture 66 (M7.25), rupture variation 34. The SRF is available [http://hypocenter.usc.edu/research/cybershake/study_15_12/273_66_34_uniform.srf here].

			[[File:PAS_s273_r66_rv34_3878v4266.png]]

	== Deterministic Site Amplification ==		== Deterministic Site Amplification ==

Scottcal: /* Sample Seismogram */

2018-02-23T22:54:01Z

Sample Seismogram

← Older revision		Revision as of 22:54, 23 February 2018
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	=== Sample Seismogram ===		=== Sample Seismogram ===

	Below is a seismogram for PAS, source 273, rupture 69, rupture variation 50, comparing the 1 Hz seismogram (blue) to the 10 Hz seismogram (green). Mostly, the 10 Hz seismogram looks sharper.		Below is a seismogram for PAS, source 273, rupture 69, rupture variation 50, comparing the 1 Hz seismogram (blue) to the 10 Hz seismogram (green). The SRF is available [http://hypocenter.usc.edu/research/cybershake/study_15_12/273_69_50_uniform.srf here].

			Mostly, the 10 Hz seismogram looks sharper.

	[[File:PAS_s273_r69_rv50_3878v4266.png]]		[[File:PAS_s273_r69_rv50_3878v4266.png]]

Scottcal at 16:55, 6 February 2018

2018-02-06T16:55:24Z

← Older revision		Revision as of 16:55, 6 February 2018
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	[[Study 15.12 Data Products]]		[[Study 15.12 Data Products]]

			Intensity measures and curves from this study are available both on the CyberShake database at focal.usc.edu, and via an SQLite database at /home/scec-04/tera3d/CyberShake/sqlite_studies/study_15_12/study_15_12.sqlite .

	Hazard curves calculated from Study 15.12 have dataset ID 61.		Hazard curves calculated from Study 15.12 have dataset ID 61.

Scottcal: /* Computational Details */

2017-03-09T17:05:24Z

Computational Details

← Older revision		Revision as of 17:05, 9 March 2017
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	Apply the modification to all sites without worrying about the specific Vs30. For sites that have Vs30 greater than about 600-700 the modification will be very minor. But the extra overhead in running the code for all sites is probably insignificant relative to the (equally trivial) overhead in checking the sites for an arbitrary Vs30 threshold and having different processing streams based on this.		Apply the modification to all sites without worrying about the specific Vs30. For sites that have Vs30 greater than about 600-700 the modification will be very minor. But the extra overhead in running the code for all sites is probably insignificant relative to the (equally trivial) overhead in checking the sites for an arbitrary Vs30 threshold and having different processing streams based on this.

	In 2011 we pulled the Vs30 values from Wills. Now we are querying CVM-S4.26, the model we used in CyberShake 15.4 deterministic, to determine Vs30, Vs5H, and VsD5H.		In 2011 we pulled the Vs30 values from Wills. Now we are querying CVM-S4.26, the model we used in CyberShake 15.4 deterministic, to determine Vs30, Vs5H, and VsD5H (H=100m).

	There are some concerns about the near-surface velocity values in the CVM used for the previous calcualtions, in particular, very high Vs for rock sites, and that is why we used Wills In CVM-S4.26, does it include the "geotechnical layer"? If so, then its probably best to use these values, so that the LF and HF portions are consistent.		There are some concerns about the near-surface velocity values in the CVM used for the previous calcualtions, in particular, very high Vs for rock sites, and that is why we used Wills In CVM-S4.26, does it include the "geotechnical layer"? If so, then its probably best to use these values, so that the LF and HF portions are consistent.

Scottcal: /* Computational Details */

2017-03-09T17:04:57Z

Computational Details

← Older revision		Revision as of 17:04, 9 March 2017
Line 58:		Line 58:
	Apply the modification to all sites without worrying about the specific Vs30. For sites that have Vs30 greater than about 600-700 the modification will be very minor. But the extra overhead in running the code for all sites is probably insignificant relative to the (equally trivial) overhead in checking the sites for an arbitrary Vs30 threshold and having different processing streams based on this.		Apply the modification to all sites without worrying about the specific Vs30. For sites that have Vs30 greater than about 600-700 the modification will be very minor. But the extra overhead in running the code for all sites is probably insignificant relative to the (equally trivial) overhead in checking the sites for an arbitrary Vs30 threshold and having different processing streams based on this.

	~~Related question - in~~ 2011 we pulled the Vs30 values from Wills. ~~Is that still correct~~, ~~or should we use Vs30 from~~ the ~~velocity~~ model we used ~~for the~~ CyberShake deterministic ~~(CVM-S4~~.~~26)?~~		In 2011 we pulled the Vs30 values from Wills. Now we are querying CVM-S4.26, the model we used in CyberShake 15.4 deterministic, to determine Vs30, Vs5H, and VsD5H.

	There are some concerns about the near-surface velocity values in the CVM used for the previous calcualtions, in particular, very high Vs for rock sites, and that is why we used Wills In CVM-S4.26, does it include the "geotechnical layer"? If so, then its probably best to use these values, so that the LF and HF portions are consistent.		There are some concerns about the near-surface velocity values in the CVM used for the previous calcualtions, in particular, very high Vs for rock sites, and that is why we used Wills In CVM-S4.26, does it include the "geotechnical layer"? If so, then its probably best to use these values, so that the LF and HF portions are consistent.

Scottcal at 19:13, 2 May 2016

2016-05-02T19:13:48Z

← Older revision		Revision as of 19:13, 2 May 2016
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	== Status ==		== Status ==

	Study 15.12 began production at 19:59:54 PST on December 3, 2015. ~~Estimated completion is February 29~~, 2016.		Study 15.12 began production at 19:59:54 PST on December 3, 2015. The study was completed at 18:32:22 PDT on April 28, 2016.

			== Data Products ==

			Hazard maps from Study 15.12 are posted:

			[[Study 15.12 Data Products]]

			Hazard curves calculated from Study 15.12 have dataset ID 61.

			Runs produced with Study 15.4 have SGT_Variation_ID=8, Rup_Var_Scenario_ID=6, ERF_ID=36, Low_Frequency_Cutoff=1.0, Max_Frequency=10.0, Velocity_Model_ID=5 in the CyberShake database.

	== Computational Goal ==		== Computational Goal ==

Scottcal: /* Sample Seismogram */

2016-02-08T18:49:14Z

Sample Seismogram

← Older revision		Revision as of 18:49, 8 February 2016
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	[[File:PAS_s273_r69_rv50_3878v4266.png]]		[[File:PAS_s273_r69_rv50_3878v4266.png]]

			[[File:PAS_s273_r69_rv50_3878v4266_accl.png]]

	== Deterministic Site Amplification ==		== Deterministic Site Amplification ==