CyberShake Study 22.12

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.

1 Status
2 Data Products
3 Science Goals
4 Technical Goals
5 Sites
6 Velocity Model
7 High-frequency codes
8 Verification
9 Updates and Enhancements
10 Output Data Products
11 Computational and Data Estimates
12 Lessons Learned
13 Stress Test
14 Performance Metrics
15 Production Checklist
- 15.1 Science to-dos
- 15.2 Technical to-dos
16 Presentations, Posters, and Papers

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:

{border="1"| ! 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