CyberShake Background Seismicity: Difference between revisions
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'''Goal: determine the importance of background seismicity in different parts of CA to either validate it's exclusion in CyberShake or motivate an inclusion strategy.''' | '''Goal: determine the importance of background seismicity in different parts of CA to either validate it's exclusion in CyberShake or motivate an inclusion strategy.''' | ||
== UCERF2 == | |||
Calculation parameters: | Calculation parameters: | ||
| Line 5: | Line 7: | ||
* ERF: UCERF2, with and without background seismicity | * ERF: UCERF2, with and without background seismicity | ||
* Site Effects: Vs30 is from Wills (2015), no basin depth terms included | * Site Effects: Vs30 is from Wills (2015), no basin depth terms included | ||
* IMT | * IMT: 2 second SA. | ||
{| | {| | ||
| Line 27: | Line 29: | ||
| [[File:ratio_ngaw2_exclude_ngaw2_include_2p_in_50.png|400px|thumb|left]] | | [[File:ratio_ngaw2_exclude_ngaw2_include_2p_in_50.png|400px|thumb|left]] | ||
| [[File:ratio_ngaw2_exclude_ngaw2_include_1p_in_50.png|400px|thumb|left]] | | [[File:ratio_ngaw2_exclude_ngaw2_include_1p_in_50.png|400px|thumb|left]] | ||
|} | |||
== UCERF3 == | |||
Calculation parameters: | |||
* GMPE: NGA-West2 GMPE (average of 4 models) | |||
* ERF: UCERF3, with the following configurations | |||
** Supra-seismogenic ruptures only (only supra-seismogenic ruptures have finite fault surfaces in UCERF3, all others treated as gridded) | |||
** Supra and Sub-seismogenic ruptures only (this adds gridded ruptures that correspond to sub-seimogenic ruptures on known faults) | |||
** Supra, Sub-seismogenic, and off fault ruptures (complete model) | |||
* Site Effects: Vs30 is from Wills (2015), no basin depth terms included | |||
* IMT: 2 second SA. | |||
{| | |||
! Model | |||
! 10% in 50yr | |||
! 2% in 50yr | |||
! 1% in 50yr | |||
|- | |||
! Supra-Seismogenic On-Fault Only | |||
| [[File:ucerf3_supra_only_10p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_supra_only_2p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_supra_only_1p_in_50.png|400px|thumb|left]] | |||
|- | |||
! Sub+Supra-Seismogenic On-Fault Only | |||
| [[File:ucerf3_sub+supra_10p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_sub+supra_2p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_sub+supra_1p_in_50.png|400px|thumb|left]] | |||
|- | |||
! Complete Model (Supra+Sub+Off) | |||
| [[File:ucerf3_sub+supra+off_10p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_sub+supra+off_2p_in_50.png|400px|thumb|left]] | |||
| [[File:ucerf3_sub+supra+off_1p_in_50.png|400px|thumb|left]] | |||
|- | |||
! Ratio Supra-Only/Complete | |||
| [[File:ratio_ucerf3_supra_only_vs_sub+supra+off_10p_in_50.png|400px|thumb|left]] | |||
| [[File:ratio_ucerf3_supra_only_vs_sub+supra+off_2p_in_50.png|400px|thumb|left]] | |||
| [[File:ratio_ucerf3_supra_only_vs_sub+supra+off_1p_in_50.png|400px|thumb|left]] | |||
|- | |||
! Ratio Supra+Sub/Complete | |||
| [[File:ratio_ucerf3_sub+supra_vs_sub+supra+off_10p_in_50.png|400px|thumb|left]] | |||
| [[File:ratio_ucerf3_sub+supra_vs_sub+supra+off_2p_in_50.png|400px|thumb|left]] | |||
| [[File:ratio_ucerf3_sub+supra_vs_sub+supra+off_1p_in_50.png|400px|thumb|left]] | |||
|} | |} | ||
Revision as of 19:33, 19 January 2018
Goal: determine the importance of background seismicity in different parts of CA to either validate it's exclusion in CyberShake or motivate an inclusion strategy.
UCERF2
Calculation parameters:
- GMPE: NGA-West2 GMPE (average of 4 models)
- ERF: UCERF2, with and without background seismicity
- Site Effects: Vs30 is from Wills (2015), no basin depth terms included
- IMT: 2 second SA.
| Model | 10% in 50yr | 2% in 50yr | 1% in 50yr |
|---|---|---|---|
| Excluding Background |  |
 |
 |
| Including Background |  |
 |
 |
| Ratio Exclude/Include |  |
 |
 |
UCERF3
Calculation parameters:
- GMPE: NGA-West2 GMPE (average of 4 models)
- ERF: UCERF3, with the following configurations
- Supra-seismogenic ruptures only (only supra-seismogenic ruptures have finite fault surfaces in UCERF3, all others treated as gridded)
- Supra and Sub-seismogenic ruptures only (this adds gridded ruptures that correspond to sub-seimogenic ruptures on known faults)
- Supra, Sub-seismogenic, and off fault ruptures (complete model)
- Site Effects: Vs30 is from Wills (2015), no basin depth terms included
- IMT: 2 second SA.
| Model | 10% in 50yr | 2% in 50yr | 1% in 50yr |
|---|---|---|---|
| Supra-Seismogenic On-Fault Only |  |
 |
 |
| Sub+Supra-Seismogenic On-Fault Only |  |
 |
 |
| Complete Model (Supra+Sub+Off) |  |
 |
 |
| Ratio Supra-Only/Complete |  |
 |
 |
| Ratio Supra+Sub/Complete |  |
 |
 |
