Difference between revisions of "HighF 2018"
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Various models were run in 2016: | Various models were run in 2016: | ||
| − | *[https://scec.usc.edu/scecpedia/HighF_v14.12_Data_Comparison#Simulation_Results_-_22_May_2016] | + | *[https://scec.usc.edu/scecpedia/HighF_v14.12_Data_Comparison#Simulation_Results_-_22_May_2016 2016 runs with 2FF and 1 PS] |
Also ran various smoothed variations of the GP15 FF (need to find a reference for that) | Also ran various smoothed variations of the GP15 FF (need to find a reference for that) | ||
| + | Rob to follow-up with Wei (last communication was in April 201). | ||
| + | |||
| + | |||
| + | Proposed models for verification and validation: | ||
PS: | PS: | ||
FF: gp.5.3.02 in document below | FF: gp.5.3.02 in document below | ||
Revision as of 18:36, 19 March 2018
This page documents the High-F activities and decisions for the 2018 verification and validation runs for three groups: Olsen et al. (AWP), Graves (RWG) and Taborda et al. (Hercules).
Contents
Mesh generation rules and parameter constraints
Velocities
- 1. Set Min Vs=500 m/s
- 2. If Vs was lower than 500 m/s and adjusted, then adjust Vp with original Vp/Vs ratio (so that we don’t have the automatic Vs/Vp of 3). We may want to set a minimum value of Vp (Rob to check)
- 3. Then set Max Vp/Vs= 3, if lower Vp to maintain the max of 3 ratio
Lame parameters (mu and lambda)
Use mu and Lambda parameters to fix Vp/Vs issues in the CVM where necessary, as part of the mesh generation. Need to make sure that patches are physical and not only to make the codes run.
- Rob to check if raw model produces lambda of <=zero.
- Note: lambda of zero corresponds to Vp/Vs= sqrt(2)=1.45
- Note: typical Vp speeds are 330 m/s in air, 1450 m/s in water and about 5000 m/s in granite
Anelastic attenuation (Q)
Frequency-independent Q definition
- Qs=100*Vs(km/s)
- Qp=2*Qs
Upper frequency
- 5Hz: based on 500 m/s and 20 m spacing
- Kim and Rob have been low-pass filtering the slip function at 5 Hz
- Ricardo and Naeem don’t filter the source
Source Models
We discussed various sources, both point source (PS) and finite-fault (FF) in the past for our verifications and validation.
Various models were run in 2016:
Also ran various smoothed variations of the GP15 FF (need to find a reference for that)
Rob to follow-up with Wei (last communication was in April 201).
Proposed models for verification and validation:
PS:
FF: gp.5.3.02 in document below
[NEED TO UPLOAD Notes from Rob
Site Selection
Simulation results
Description: results for the small region from November 10 2017:
Description: small region simulations for Hercules, AWP (updated since November 2017) and RWG (medium size model to avoid boundary reflexions):
Description: results for the small region from November 10 2017:
Description: small region simulations for Hercules (updated to use simulations including Q), AWP (updated since November 2017) and RWG (medium size model to avoid boundary reflexions):
Related Pages
