SCEC Broadband Platform Capabilities and Plans

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SCEC Broadband Platform Capabilities and Plans
Philip MaechlingInformation Technology
ArchitectSouthern California Earthquake Center
(SCEC)28 January 2008
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Running a Simple BBP Example

• Purpose
• Calculate 10Hz seismograms (and spectral
  amplitudes) using a combinations of codes.
• Combine Results of Available Codes
• Rupture Generators URS and UCSB
• Low Frequency Codes URS and UCSB
• All codes use 1D velocity models for low
  frequency calculations.
• High Freq Codes URS and UCSB and SDSU/ETH

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Broadband Platform Workflow
Greens Functions
Amps
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Running a Simple BBP Example

• Select the collection of codes you would like to
  run and type in the number of that set of codes.

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Input a Rupture Description
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Input a Station Location File
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Input a Station 1D Velocity Model
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Running a Simple BBP Example

• Login into the SCEC computer (intensity.usc.edu)
• User account bband
• Pwd TBD
• Move to the configuration directory
• Type start
• This is an alias that will move you to the
  configuration directory
• Review the three input files
• Eq.src Earthquake Source Description
• Stations.ll Station Locations in Lat/lon
  (decimal degrees)
• BB01-01.vld velocity model
• Run the platform by typing
• Type run_bbp.py
• This is the name of the top level BB Platform
  script

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BB Platform Directory Structure

• Every simulation is assigned a simulation id
• This is basically a timestamp (epoch seconds)
• Will wrap in about 3 months
• Information about a simulation is keyed to this
  number
• Input, tmp, and output directories are created
  for a simulation and the files related to the
  simulation are stored in these directories
• The user should only need to look at the data
  directory, the output directory that contains the
  broadband seismograms and the metadata file.

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BB Platform Directory Structure

• To help keep track of how seismograms were
  created, a metadata.txt file is created for
  each simulation.
• This lists the programs and the parameters used
  to create the seismograms.

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BB Metadata File Structure
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Broadband Platform Hanging Wall Exercise
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Broadband Platform Seismograms
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Broadband Platform Station SA Amplitudes
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BB Platform Directory Structure

• Platform is designed by creating components
  that can be interchanged.
• A component is a python script that wraps all the
  executables and scripts needed to do that
  processing.

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BB Platform Directory Structure

• Next Steps
• Distribute programs so that we can run on
  supercomputers.
• Add new components by creating new components
  using new codes
• Integrate capability to run 3D low frequency
  simulations
• Integrate capability to just run HF part to add
  HF to low frequency seismograms.

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End