Transcript SCEC Broadband Platform Capabilities and Plans Philip Maechling Information Technology Architect Southern California Earthquake Center (SCEC) 28 January 2008 SCEC: An NSF + USGS Research Center.

SCEC Broadband Platform Capabilities and
Plans
Philip Maechling
Information Technology Architect
Southern California Earthquake Center (SCEC)
28 January 2008
SCEC: An NSF + USGS Research Center
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
Broadband Platform Workflow
Greens Functions
Rupture
Generator
Rupture
Config
Low Freq
Sim
Rupture
Variation
High Freq
Sim
Seismograms
Spectral
Amplitudes
Seismograms
Amps
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.
Number
Rupture Model
Generator
Low Frequency
Seismogram
High Frequency
Seismograms
1
URS
URS
URS
2
URS
UCSB
UCSB
3
URS
URS
SDSU
4
UCSB
UCSB
UCSB
5
UCSB
URS
URS
6
UCSB
URS
SDSU
Input a Rupture Description
Input a Station Location File
Input a Station 1D Velocity Model
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
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.
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.
BB Metadata File Structure
Broadband Platform “Hanging Wall”
Exercise
Broadband Platform Seismograms
Broadband Platform Station SA Amplitudes
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.
Rupture
Generator
Rupture
Config
Low Freq
Sim
Rupture
Variation
High Freq Spectral
Amplitudes
Sim
Seismograms Seismograms
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.
End