Difference between revisions of "CyberShake Study 22.12"

From SCECpedia
Jump to navigationJump to search
Line 14: Line 14:
  
 
== Velocity Model ==
 
== Velocity Model ==
 +
 +
== High-frequency codes ==
 +
 +
For this study, we will use the Graves & Pitarka high frequency module (hb_high) from the Broadband Platform v22.4, hb_high_v6.0.5.  We will use the following parameters:
 +
 +
{|
 +
! Parameter !! Value
 +
|-
 +
| stress_average || 50
 +
|-
 +
| rayset || 2,1,2
 +
|-
 +
| siteamp || 1
 +
|-
 +
| nbu || 4 (not used)
 +
|-
 +
| ifft || 0 (not used)
 +
|-
 +
| flol || 0.02 (not used)
 +
|-
 +
| fhil || 19.9 (not used)
 +
|-
 +
| irand || Seed used for generating SRF
 +
|-
 +
| tlen || Seismogram length, in sec
 +
|-
 +
| dt || 0.01
 +
|-
 +
| fmax || 10 (not used)
 +
|-
 +
| kappa || 0.04
 +
|-
 +
| qfexp || 0.6
 +
|-
 +
| mean_rvfac || 0.775
 +
|-
 +
| range_rvfac || 0.1
 +
|-
 +
| rvfac || Calculated using BBP hfsims_cfg.py code
 +
|-
 +
| shal_rvfac || 0.6
 +
|-
 +
| deep_rvfac || 0.6
 +
|-
 +
| czero || 2
 +
|-
 +
| c_alpha || -99
 +
|-
 +
| sm || -1
 +
|-
 +
| vr || -1
 +
|-
 +
| vsmoho || 999.9
 +
|-
 +
| nlskip || -99
 +
|-
 +
| vpsig || 0
 +
|-
 +
| vshsig || 0
 +
|-
 +
| rhosig || 0
 +
|-
 +
| qssig || 0
 +
|-
 +
| icflag || 1
 +
|-
 +
| velname || -1
 +
|-
 +
| fa_sig1 || 0
 +
|-
 +
| fa_sig2 || 0
 +
|-
 +
| rvsig1 || 0.1
 +
|-
 +
| ipdur_model || 11
 +
|-
 +
| ispar_adjust || 1
 +
|-
 +
| targ_mag || -1
 +
|-
 +
| fault_area || -1
 +
|-
 +
| default_c0 || 57
 +
|-
 +
| default_c1 || 34
 +
|}
  
 
== Verification ==
 
== Verification ==

Revision as of 22:11, 20 July 2022

CyberShake Study 22.10 is a proposed study in Southern California which will include deterministic low-frequency (0-1 Hz) and stochastic high-frequency (1-50 Hz) simulations. We will use the Graves & Pitarka (2019) rupture generator and the high frequency modules from the SCEC Broadband Platform v22.4.

Status

This study is in the planning phase. We estimate calculations will begin in October 2022.

Data Products

Science Goals

Technical Goals

Sites

Velocity Model

High-frequency codes

For this study, we will use the Graves & Pitarka high frequency module (hb_high) from the Broadband Platform v22.4, hb_high_v6.0.5. We will use the following parameters:

Parameter Value
stress_average 50
rayset 2,1,2
siteamp 1
nbu 4 (not used)
ifft 0 (not used)
flol 0.02 (not used)
fhil 19.9 (not used)
irand Seed used for generating SRF
tlen Seismogram length, in sec
dt 0.01
fmax 10 (not used)
kappa 0.04
qfexp 0.6
mean_rvfac 0.775
range_rvfac 0.1
rvfac Calculated using BBP hfsims_cfg.py code
shal_rvfac 0.6
deep_rvfac 0.6
czero 2
c_alpha -99
sm -1
vr -1
vsmoho 999.9
nlskip -99
vpsig 0
vshsig 0
rhosig 0
qssig 0
icflag 1
velname -1
fa_sig1 0
fa_sig2 0
rvsig1 0.1
ipdur_model 11
ispar_adjust 1
targ_mag -1
fault_area -1
default_c0 57
default_c1 34

Verification

Updates and Enhancements

Output Data Products

Computational and Data Estimates

Lessons Learned

Stress Test

Performance Metrics

Production Checklist

Science to-dos

  • Perform validation for Northridge, Chino Hills, Whittier, Landers, Hector Mine, and North Palm Springs
  • For each validation event, calculate BBP results, CS results, and CS results with BBP Vs30 values
  • Check for spectral discontinuities around 1 Hz
  • Decide if we should stick with rvfrac=0.8 or allow it to vary


  • Determine appropriate SGT, low-frequency, and high-frequency seismogram durations
  • Update high-frequency Vs30 to use released Thompson values

Technical to-dos

  • Integrate refactoring of BBP codes into latest BBP release
  • Switch to using github repo version of CyberShake on Summit
  • Update to latest UCVM (v22.7)
  • Switch to optimized version of rupture generator
  • Test DirectSynth code with fixed memory leak from Frontera
  • Switch to using Pegasus-supported interface to Globus transfers

Presentations, Posters, and Papers

Retrieved from "https://strike.scec.org/scecwiki/index.php?title=CyberShake_Study_22.12&oldid=26772"