Difference between revisions of "CyberShake Study 24.8"

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Historically, we have determined which ruptures to include in a CyberShake run by calculating the distance between the site and the closest part of the rupture surface.  If that distance is less than 200 km, we then include all ruptures which take place on that surface, including ruptures which may extend much farther away from the site than 200 km.
 
Historically, we have determined which ruptures to include in a CyberShake run by calculating the distance between the site and the closest part of the rupture surface.  If that distance is less than 200 km, we then include all ruptures which take place on that surface, including ruptures which may extend much farther away from the site than 200 km.
  
For Northern California sites, this means that sites around San Jose and south include southern San Andreas events (events which rupture the northernmost segment of the southern San Andreas) within 200 km.  Since there are some UCERF2 ruptures which extend from the Parkfield segment all the way down to Bombay Beach, the simulation volumes for some of these Northern California sites cover most of the state.  This was the case for Study 18.8 (sample volumes can be seen [[on this page|Study_18.5_Velocity_Model_Comparisons#Cross-sections_from_production_velocity_mesh]]).  This required tiling together 3 3D models and a background 1D model.
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For Northern California sites, this means that sites around San Jose and south include southern San Andreas events (events which rupture the northernmost segment of the southern San Andreas) within 200 km.  Since there are some UCERF2 ruptures which extend from the Parkfield segment all the way down to Bombay Beach, the simulation volumes for some of these Northern California sites cover most of the state.  This was the case for Study 18.8 (sample volumes can be seen [[Study_18.5_Velocity_Model_Comparisons#Cross-sections_from_production_velocity_mesh|on this page]]).  This required tiling together 3 3D models and a background 1D model.
  
 
To simplify the velocity model and reduce the volumes, we are investigating omitting southern San Andreas events from this study.
 
To simplify the velocity model and reduce the volumes, we are investigating omitting southern San Andreas events from this study.

Revision as of 13:12, 8 September 2023

CyberShake Study 24.1 is an upcoming study in Northern California which includes deterministic low-frequency (0-1 Hz) and stochastic high-frequency (1-50 Hz) simulations. We will use the Graves & Pitarka (2022) rupture generator and the high frequency modules from the SCEC Broadband Platform v22.4.

Status

This study is in the planning phase. We hope to begin this study in January 2024.

Data Products

Science Goals

Technical Goals

Sites

Ruptures to Include

Historically, we have determined which ruptures to include in a CyberShake run by calculating the distance between the site and the closest part of the rupture surface. If that distance is less than 200 km, we then include all ruptures which take place on that surface, including ruptures which may extend much farther away from the site than 200 km.

For Northern California sites, this means that sites around San Jose and south include southern San Andreas events (events which rupture the northernmost segment of the southern San Andreas) within 200 km. Since there are some UCERF2 ruptures which extend from the Parkfield segment all the way down to Bombay Beach, the simulation volumes for some of these Northern California sites cover most of the state. This was the case for Study 18.8 (sample volumes can be seen on this page). This required tiling together 3 3D models and a background 1D model.

To simplify the velocity model and reduce the volumes, we are investigating omitting southern San Andreas events from this study.

Velocity Model

Rupture Generator

High-frequency codes

Updates and Enhancements

Output Data Products

Computational and Data Estimates

Lessons Learned

Stress Test

Events During Study

Performance Metrics

Production Checklist

Presentations, Posters, and Papers

References