scec broadband platform development using usc hpcc philip maechling (maechlin@usc)
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SCEC Broadband Platform Development Using USC HPCC Philip Maechling ([email protected]) 12 Nov 2012. Presentation Topics. Studying Earthquakes In California Using Computer Simulations to Study Earthquakes Establishing the Value of Seismic Forecasts SCEC Broadband Platform Development. - PowerPoint PPT PresentationTRANSCRIPT
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SCEC Broadband Platform
Development Using USC HPCC
Philip Maechling ([email protected])
12 Nov 2012
Presentation Topics
1.Studying Earthquakes In California2.Using Computer Simulations to Study Earthquakes3.Establishing the Value of Seismic Forecasts4.SCEC Broadband Platform Development
Southern California in 1857
The most recent ‘big one’ in southern California
Southern California in 2012
• Over 23 million people
• Fastest growing areas are close to the San Andreas
SCEC: An NSF + USGS Research Center
M8 Science ImpactFor the purposes of this Act, an active fault is defined by the
State Mining and Geology Board as one which has “had surface displacement within Holocene time (about the last 11,000 years)” (see Appendix B, Section 3601).
SCEC: An NSF + USGS Research Center
M8 Science ImpactFor the purposes of this Act, an active fault is defined by the
State Mining and Geology Board as one which has “had surface displacement within Holocene time (about the last 11,000 years)” (see Appendix B, Section 3601).
SCEC: An NSF + USGS Research Center
M8 Science ImpactAlquist-Priolo Earthquake Fault-Zoning Act
Rupture Hazard Zones near Long Beach, CA.
SCEC: An NSF + USGS Research Center
M8 Science Impact Fault-Rupture Hazard Zones near Long Beach, CA.
SCEC: An NSF + USGS Research Center
M8 Science Impact Fault-Rupture Hazard Zones near Long Beach, CA.
SCEC: An NSF + USGS Research Center
M8 Science Impact Fault-Rupture Hazard Zones near Long Beach, CA.
SCEC: An NSF + USGS Research Center
M8 Science Impact Fault-Rupture Hazard Zones near Long Beach, CA.
I-405 and Long Beach
Airport
Signal Hill Town Center
Shopping Center
Long Beach City College
Signal Hill Oil Storage Facility
Community Hospital
of Long Beach
Long Beach State University
Stadium
Presentation Topics
1.Studying Earthquakes In California2.Using Computer Simulations to Study Earthquakes3.Establishing the Value of Seismic Forecasts4.SCEC Broadband Platform Development
Characteristics of Scientific Simulations
The reasons seismologists and earthquake engineers want to make better use of simulations are shared with other domains.
Types of Seismic Hazard Forecasts with Commercial or Governmental Market
SCEC research is improving each forecast type.
Seismic Hazard Forecast Types Forecast Users
Earthquake Early Warning Forecast Public, Press, City, State, National Governments
Scenario Earthquake Seismograms Forecasts
Engineering Companies, Insurance Companies, State, National Governments
Short-term earthquake Forecasts Public, Press, State and National Governments
Long-term Probabilistic Seismic Hazard Forecasts
Engineering Companies, Building Code Developers, Insurance companies,State and National Governments,
Presentation Topics
1.Studying Earthquakes In California2.Using Computer Simulations to Study Earthquakes3.Establishing the Value of Seismic Forecasts4.SCEC Broadband Platform Development
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Example Ground Motion Simulation Objectives
Goal:
Characterize the seismic vulnerability of nuclear power plants in the United States.
Approach:
Use computer simulations to determine how strong ground motions might affect existing structures.
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Topics
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Topics
EERI Seminar on Next Generation Attenuation Models
Introduction
Validation = comparison against observations
vs.
Verification = comparison against theoretical predictions
SCEC has established a Technical Activity Group (TAG) focused on GMSV in order to develop and implement testing/rating methodologies via collaboration between ground motion modelers and engineering users.
“SCEC Technical Activity Group on Ground Motion Simulation Validation,” N. Luco, USGS March 7, 2012
Southern California Earthquake Center (SCEC) Broadband Platform Meeting
EERI Seminar on Next Generation Attenuation Models
Initial Recommendations
“SCEC Technical Activity Group on Ground Motion Simulation Validation,” N. Luco, USGS March 7, 2012
Southern California Earthquake Center (SCEC) Broadband Platform Meeting
(2)
(1) (4) (3)Vs
InputRock Att.
G/GMax
D
Output
(From C. Goulet)(From F. Zareian)
Presentation Topics
1.Studying Earthquakes In California2.Using Computer Simulations to Study Earthquakes3.Establishing the Value of Seismic Forecasts4.SCEC Broadband Platform Development
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Broadband Platform Usage Modes
SCEC Broadband Platform Capabilities:
Use Case 1: Calculate Historical Seismograms– User selects a validation event and the platform calculates
broadband synthetic seismograms at selected locations and compares synthetic seismograms to observed data.
Use Case 2: Calculate Scenario Seismograms- User defines parameters for a scenario earthquake, selects
modules to use, and calculates broadband seismograms for the event.
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Broadband Platform Development History
2006 – Scripted and Pegasus Version Developed
2008 – Python Version Developed (First Hanging Wall Problem)
2010 – First Supported Software Release of Platform
2011 – Current Version Released (v11.2.2) (Second Hanging Wall Problem)
2012 – Planning next Broadband Platform version
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Broadband Platform Development Support
• PGE and SCE funding for 2012-2013– Improve scalability by prepare code to run on Cluster– Add new validation event data sets– Add new validation processing and GOF– Run large scale simulations– Add new modules
• SCEC NSF-SI2 project funding of ~2.5M over three years.– Prepare open-source scientific software distribution– Use modern software engineering development techniques– Add new modules– Increase scalability of scientific software
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Broadband Platform Users
• UCI• ETH• Stanford• PEER• UCB• University of Pavia• URS• Model Developer groups UCSB, SDSU, USGS
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Broadband Platform Overview
Broadband Platform Software Distributions:Source Codes and Input Config Files : 2G (increases as platform runs) Data Files (Greens Functions) : 11G (static input files)
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Increase Scale of Broadband Platform
We have developed a new version of SCEC Broadband platform configured to run on SCEC server and on USC Cluster, so that it is capable of running large ensembles of simulations.
Rupture Generation (optional)
• Converts user-provided simple earthquake description into SRF (extended rupture description) file
• Two implementations• Optional module (can supply SRF)
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MAGNITUDE = 6.67FAULT_LENGTH = 20.01DLEN = 0.2FAULT_WIDTH = 25.01DWID = 0.2DEPTH_TO_TOP = 5.0STRIKE = 122RAKE = 90DIP = 40LAT_TOP_CENTER = 34.344LON_TOP_CENTER = -118.515HYPO_ALONG_STK = 6.0HYPO_DOWN_DIP = 19.4DT = 0.01SEED = 3092096
Source Description Rupture with slip
Data Products
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SRF PlotsVelocity and acceleration
seismograms
Station and fault trace maps
Comparison Data Products
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Spectral response
comparison Seismogram comparison
Goodness-of-fit
Evaluation Criteria• Qualitative evaluation of velocity time series and Husid plot
based on Arias intensity
Spectral Acceleration Goodness of Fit
Ri = ln(Oi /Si)
Bias = (1/N) Ri
= [(1/N) (Ri – Bias)2]1/2
Supported Broadband PlatformSoftware Release
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Questions?
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