Difference between revisions of "Broadband Platform"

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[[File:Bbp.jpg|256px|thumb|right|Fig 1: Broadband Platform.]]
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[[File:SRL_Cover_v8.png|350px|thumb|right|Fig 1: Broadband Platform showing ground motion simulation methods (blue circles), and optional post-processing methods (green circles).]]
  
The SCEC Broadband Platform is a software system which generates 0-100 Hz seismograms for historical and scenario earthquakes in California, Eastern North America, and Japan.
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The Southern California Earthquake Center (SCEC) Broadband Platform (BBP) is a software system that can generate 0-20+ Hz seismograms for historical and scenario earthquakes in California, Eastern North America, and Japan using several alternative computational methods.
 
 
== Overview ==
 
 
 
The goal of the SCEC Broadband Simulation Platform is to generate broadband (0-100 Hz) ground motions for earthquakes. The SCEC Broadband Platform is a collaborative software development project involving SCEC researchers, research engineers, graduate students, and the SCEC/CME software development group. SCEC scientific groups have contributed modules to the Broadband Platform including rupture generation, low- and high-frequency seismogram synthesis, non-linear site effects, and visualization. These complex scientific codes have been integrated into a system that supports easy on-demand computation of broadband seismograms.  The SCEC Broadband Platform is designed to be used by both scientific and engineering researchers with some experience interpreting ground motion simulations.
 
 
 
Users may calculate broadband seismograms for both historical earthquakes (validation events including Northridge and Loma Prieta) and user-defined earthquakes. The platform produces a variety of data products, including broadband seismograms, rupture visualizations, and several goodness-of-fit plots.  Users can install the platform on their own machine, verify that it is installed correctly, and run their own simulations on demand without requiring knowledge of any of the code involved. Users may run a validation event, supply their own simple source description, or provide a rupture description in SRF format. Users may specify their own list of stations or use a provided list. Currently the platform supports stations and events in Southern California, the Bay Area, the Mojave Desert, Eastern United States, Eastern Canada, Central and Western Japan. Users may select among various method that include rupture generation, low-frequency synthesis, high-frequency synthesis, and incorporation of site effects, with the option of running a goodness-of-fit comparison against observed or simulated seismograms.  These codes have been validated against recorded ground motions from real events.
 
 
 
The Broadband Platform was implemented using software development best practices, including version control, user documentation, acceptance tests, and formal releases, with the aim of ease of installation and use.
 
 
 
== Description ==
 
The SCEC Broadband Platform (BBP) (Phase 1, June 2013 and March 2014) has been developed and released as open-source scientific software that can generate broadband (0-100Hz) ground motions for earthquakes, integrating complex scientific modules that implement rupture generation, low and high-frequency seismogram synthesis, non-linear site effects calculation, and visualization into a software system that supports easy on-demand computation of seismograms. The BBP has been developed by a scientific and engineering collaboration that involves geoscientists, civil engineers, graduate students, and scientific software developers. The SCEC BBP operates in two modes: validation simulations and scenario simulations. In validation mode, the BBP runs earthquake rupture and wave propagation modeling software to calculate seismograms of a historical earthquake for which observed strong ground motion data is available. Here, the BBP calculates a number of goodness of fit (GOF) measurements that quantify how well the model-based broadband seismograms match the observed seismograms. Based on these results, the BBP can be used to evaluate and validate different numerical ground motion modeling techniques. The BBP currently accommodates validation simulation inputs and observational data for 12 historical events from the eastern and western United States, eastern north America, and Japan. In scenario mode, the user specifies an earthquake description, a list of station names and locations, and a 1D velocity model for the region of interest simulations for hypothetical earthquakes, and the BBP software then calculates ground motions for the specified stations.
 
  
 
== Current Release ==
 
== Current Release ==
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The current release of the SCEC Broadband Platform software is available for download from:
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* [https://github.com/SCECcode/bbp Broadband Platform v22.4.0 Software Source Code Repository]
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* [https://github.com/SCECcode/bbp/wiki Broadband Platform Wiki-based Documentation]
  
The current official release of Broadband Platform is v14.3.0. This is a new version of the platform that includes a large number of new capabilities. It is the first major release of the Broadband Platform since version 13.9.0, released in September 2013. Details of the new features along with several bugs fixes are provided in the release notes and the "changes" section below. New, and old Broadband platform users should work with this version of the software, and we recommend current Broadband platform users migrate to this new version whenever possible.
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This version was released in May 2022. BBP v22.4 includes several new capabilities. Details of the new features and capabilities of BBP v22.4 are described in the [https://github.com/SCECcode/BBP/wiki/Release-Notes BBP v22.4 release notes]. We recommend that all new users work with BBP v22.4 because this version adds new capabilities and improvements to the methods provided in earlier releases of the Broadband Platform. We recommend existing Broadband platform users migrate to BBP v22.4 whenever possible. Previous versions of the Broadband Platform will remain available for users that want to reproduce results produced with earlier versions of the Platform. Please review the [https://github.com/SCECcode/BBP/wiki/Installation BBP installation instructions] for details on how to download and install BBP v22.4 on your local computer.
  
== Dependencies ==
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== Overview ==  
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The goal of the SCEC Broadband Simulation Platform is to generate broadband (0-20+ Hz) ground motions for earthquakes. The SCEC Broadband Platform is a collaborative software development project involving SCEC researchers, research engineers, graduate students, and the SCEC/CME software development group. SCEC scientific groups have contributed modules to the Broadband Platform including kinematic rupture generation, low- and high-frequency seismogram synthesis using 3D wave propagation through 1D layered velocity structures, non-linear site effects, ground motion intensity measure calculations, and visualization. These complex scientific codes have been integrated into a system that supports easy on-demand computation of broadband seismograms, providing user-defined, repeatable calculation of ground-motion seismograms, using alternative simulation methods, and software utilities to generate tables, plots, and maps. The SCEC Broadband Platform is designed to be used by both scientific and engineering researchers with some experience interpreting ground motion simulations.
  
Broadband has the following dependencies:
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Users may calculate broadband seismograms for both historical earthquakes (validation events including Northridge, Loma Prieta, etc.) and user-defined earthquakes. The platform produces a variety of data products, including broadband seismograms, rupture visualizations, and several goodness-of-fit plots. When running a validation event, users supply their own simple source description, or provide a rupture description in SRF format. Users may specify their own list of stations or use a provided list.
  
*[http://www.python.org/download/ Python 2.6+] with
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The SCEC BBP software can be compiled and run on recent Linux systems with GNU compilers. The Broadband Platform continues to evolve, and new versions of the BBP are released periodically on GitHub. The latest release includes seven simulation methods, eight simulation regions covering California, Japan, Eastern North America, and the ability to compare simulation results against empirical ground motion models. The newest features include the ability to simulate multi-segment ruptures using several simulation methods. And, in addition to a new simulation method, it now includes improvements to several existing ground motion simulation methods and revised Green’s functions for all simulation regions. In this release, the site response module is integrated with all simulation methods and can also be used for comparing simulated data against historical earthquakes
**[http://new.scipy.org/download.html NumPy 1.4.1]
 
**[http://new.scipy.org/download.html Scipy 0.7.2]
 
**[http://matplotlib.sourceforge.net/ matplotlib 1.0.1]
 
**[http://code.google.com/p/pyproj/ PyProj 1.8.9]
 
*[http://gcc.gnu.org GNU compilers (gcc, gfortran) v4.5.1]
 
*[http://software.intel.com/en-us/articles/non-commercial-software-download/ Intel compilers (64-bit) 12.0.4]
 
  
Please refer to the [[Broadband User Guide v14.3.0]] for more details about the specific versions required for each of the packages above. A non-commercial copy of Intel C and FORTRAN compilers can be obtained by registering for a [http://software.intel.com/en-us/articles/non-commercial-software-development/ non-commercial account with Intel] and downloading the compilers from the Intel website.
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The Broadband Platform is open-source software that is made available under the terms of the BSD-3 License. A copy of the License can be found with the software in the 'LICENSE' file in the GitHub repository.
  
== Documentation ==
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== Technical Support  ==
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For assistance with the Broadband Platform, you may
 +
* Email software @ scec.org with specific questions
 +
* Browse and submit new trouble tickets, or feature requests, at [https://github.com/SCECcode/bbp/issues Broadband Issues Page].
  
User Guide Wiki (includes installation instructions):  
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== Broadband Platform Developers and Collaborators ==
*[[Broadband User Guide v14.3.0]]
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*[http://www.scec.org SCEC]
*[[Broadband File Format Guide]]
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*[http://www.geology.sdsu.edu/ San Diego State University Dept of Geological Sciences]
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*[http://www.geol.ucsb.edu/ U.C. Santa Barbara Dept of Earth Sciences]
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*[http://www.crustal.ucsb.edu/ UCSB Institute for Crustal Studies]
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*[http://www.seismo.unr.edu University of Nevada Reno]
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*[http://www.uwo.ca/earth/ University of Western Ontario]
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*[http://www.erdw.ethz.ch/index_EN ETH Zurich - Swiss Federal Institute of Technology Zurich]
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*[http://earthquake.usgs.gov USGS Earthquake Hazards Program including Pasadena California]
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*[http://www.aecom.com AECOM]
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*[http://www.ce.berkeley.edu University of California, Berkeley]
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*[http://peer.berkeley.edu Pacific Earthquake Engineering Research Center]
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*[http://english.kigam.re.kr/html/en Korea Institute of Geoscience and Mineral Resources (KIGAM)]
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*[https://www.llnl.gov Lawrence Livermore National Laboratory]
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*[http://cidir.iii.u-tokyo.ac.jp/about_cidir_en.html Center for Integrated Disaster Information Research, University of Tokyo, Japan]
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*[http://www.ait.ac.jp/e/ Aichi Institute of Technology, Japan]
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*[http://www.bosai.go.jp/e/ National Research Institute for Earth Sciences and Disaster Resilience, Tsukuba, Japan]
  
== Downloads ==
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== Broadband Publications ==
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*[https://pubs.geoscienceworld.org/ssa/srl/article/88/6/1539-1552/353986 SRL Article]
  
To install and use the Broadband platform, you need the source code, one or more Green's Functions packages, and optionally one or more Validation packages. The Broadband Platform contains cumulative improvements to the geoscientific codes and software infrastructure. We recommend use of the most recent version of the Broadband Platform, unless you are trying to reproduce results generated with an earlier version of the platform.
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== Supporting Presentation Materials ==
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*[http://hypocenter.usc.edu/research/BBP/Goulet_BBP_20170920.pptx Broadband Platform Description - 2017 (pptx, 1.6 MB)]
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*[http://hypocenter.usc.edu/research/bbp/california_gfs_19_4.pdf California Map Showing Suggested Approximate Regions for GFs (PDF, 133KB)]
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*[http://hypocenter.usc.edu/research/SSA/Broadband-poster-SSA-2019.pdf Broadband Poster from SSA 2019 (PDF, 14MB)]
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*[http://hypocenter.usc.edu/research/bbp/bbp-16-5-release.pdf Broadband Platform 16.5.0 Release Overview (PDF, 1.9 MB)]
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*[http://hypocenter.usc.edu/research/BBP/Maechling_BBP_5May2015_v3.pptx Broadband Platform Description - 2015 (pptx, 3.9 MB)]
  
Users that are upgrading from previous version of the Broadband Platform will need to retrieve new versions of all the Broadband Platform packages as there have been significant changes in all the packages since the previous 13.9.0 release.
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== Frequently Asked Questions (FAQ) ==
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We post BBP user questions and our response to a Broadband Platform Frequently Asked Questions (FAQ) page:
 +
* [https://github.com/SCECcode/BBP/wiki/FAQ BBP FAQ]
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* [http://scec.usc.edu/scecpedia/Broadband_Product_Backlog Broadband Platform Backlog]
  
There are detailed installation instructions in the [[Broadband User Guide v14.3.0]].
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== Related Wiki Entries ==
 
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*[http://scec.usc.edu/scecpedia SCEC Wiki Main]
Detailed instructions to setup the Broadband Platform as a local installation on a Linux Machine are provided in the [[Broadband User Guide v14.3.0]]. Briefly, they can be summarized in the following steps:
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*[http://www.scec.org SCEC Home Page]
# The software can be installed in an account on a Linux computer with at least 10GB of disk storage and C, Fortran, and Python software installed.
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*[[SWUS Project]]
# From this Linux computer, start a web browser and point to this download page.  Alternatively, you can download the files to a different machine and use FTP or SFTP to copy them over.
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*[http://scec.usc.edu/scecpedia/software SCEC Software Downloads]
# Download each file into a directory and run the md5sum program to confirm you have an undamaged version of the distribution files by comparing the md5sum provided below against the one calculated at the local Linux computer.
 
# Uncompress the distribution (tar.gz) files into the proper directory structure as described in the [[Broadband User Guide v14.3.0]].
 
# Build the executables by running the top level makefile.
 
# Configure your environment by adding a few Broadband Platform variables to your shell's environment.
 
# Confirm the code is built correctly by running UnitTests.
 
# Confirm the code runs correctly on your system by running AcceptanceTests.
 
# Use the platform for research purposes.
 
 
 
== Current Broadband Platform Release ==
 
 
 
The current SCEC Broadband platform release is v14.3.0. Links to the source distribution and Green's Functions and Validation packages are listed in the table below:
 
 
 
{| class="wikitable" border="1" cellpadding="5" cellspacing="0"
 
|-
 
! rowspan="2"| Version
 
! rowspan="2"| Release Date
 
! colspan="3"| Files
 
! rowspan="2"| User Guide
 
|-
 
! Source Code
 
! Green's Functions Packages
 
! Validations Packages
 
|-
 
! scope="row" rowspan="1" | 14.3.0
 
| 03/31/2014
 
| Send email to software@scec.org to request a copy,
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/bbp-dist-14.3.0.tar.gz.md5 BBP 14.3.0.md5]
 
| [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/centraljapan-velocity-model-14.3.0.tar.gz Central Japan], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/centraljapan-velocity-model-14.3.0.tar.gz.md5 Central Japan.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/labasin-velocity-model-14.3.0.tar.gz LA Basin], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/labasin-velocity-model-14.3.0.tar.gz.md5 LA Basin.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/lomap-velocity-model-14.3.0.tar.gz LOMAP (NoCal)], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/lomap-velocity-model-14.3.0.tar.gz.md5 LOMAP.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/mojave-velocity-model-14.3.0.tar.gz Mojave], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/mojave-velocity-model-14.3.0.tar.gz.md5 Mojave.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/westernjapan-velocity-model-14.3.0.tar.gz Western Japan], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/westernjapan-velocity-model-14.3.0.tar.gz.md5 Western Japan.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/ceus1000-velocity-model-14.3.0.tar.gz Eastern United States], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/ceus1000-velocity-model-14.3.0.tar.gz.md5 Eastern United States.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/canada1000-velocity-model-14.3.0.tar.gz Eastern Canada], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/canada1000-velocity-model-14.3.0.tar.gz.md5 Eastern Canada.md5]
 
 
 
| [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/lomaprieta-validation-14.3.0.tar.gz Loma Prieta], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/lomaprieta-validation-14.3.0.tar.gz.md5 Loma Prieta.md5]
 
 
 
[http://hypocenter.usc.edu/research/bbp/versions/14.3.0/northridge-validation-14.3.0.tar.gz Northridge], [http://hypocenter.usc.edu/research/bbp/versions/14.3.0/northridge-validation-14.3.0.tar.gz.md5 Northridge.md5]
 
|[[Broadband User Guide v14.3.0]]
 
[[Broadband v14.3.0 Release Notes]]
 
|}
 
  
 
== Older Broadband Platform Releases ==
 
== Older Broadband Platform Releases ==
 
 
Earlier version of the broadband platform software and data distributions are provided to support existing Broadband platform users. However, we recommend all users upgrade to the most recent version at first opportunity. Earlier releases can be found in the [[Broadband Platform Previous Releases]] page.
 
Earlier version of the broadband platform software and data distributions are provided to support existing Broadband platform users. However, we recommend all users upgrade to the most recent version at first opportunity. Earlier releases can be found in the [[Broadband Platform Previous Releases]] page.
  
== Supporting Materials ==
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== Acknowledging ==
*[http://hypocenter.usc.edu/research/SSA/Broadband-poster-SSA-2014-final.pdf - Broadband Poster from SSA 2014 - Fabio Silva (PDF, 8.3MB)]
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Please support the Broadband Platform project by acknowledging the use of this software in your presentations and publications. Acknowledgements and citations help us obtain additional resources for continued development of the platform. If you use the Broadband Platform software for work resulting in an academic publication, we would appreciate it if one, or more, of the following paper is cited.
*[http://hypocenter.usc.edu/research/AGU14/Broadband-poster-AGU-2014.pdf Broadband poster from AGU 2014 (PDF, 13.8MB)]
 
*[http://hypocenter.usc.edu/research/broadband/documents/Broadband_overview.ppt Broadband overview talk from SC10 (PPT, 3.7 MB)]
 
*[http://hypocenter.usc.edu/research/broadband/documents/Broadband_module_schematics.pptx Technical diagrams of Broadband module relationships (PPTX, 16 KB)]
 
  
== Development version ==
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The primary reference for the Broadband Platform software system is:
 +
#Maechling, P. J., F. Silva, S. Callaghan, and T. H. Jordan (2015). SCEC Broadband Platform: System Architecture and Software Implementation, Seismol. Res. Lett., 86, no. 1, doi: 10.1785/0220140125.
  
If you're interested in working with the latest development version of the platform, you can check it out from
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References for specific computational methods included in the Broadband Platform and for the validation procedures developed by the Broadband Platform include:
svn co https://source.usc.edu/svn/broadband/trunk
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# Goulet, C.A., Abrahamson, N.A., Somerville, P.G. and K, E. Wooddell (2015) The SCEC Broadband Platform Validation Exercise: Methodology for Code Validation in the Context of Seismic-Hazard Analyses, Seismol. Res. Lett., 86, no. 1, doi: 10.1785/0220140104
 +
# Dreger, D. S., Beroza, G.C., Day, S. M., Goulet, C. A., Jordan, T. H., Spudich, P. A., and Stewart, J. P. (2015). Validation of the SCEC Broadband Platform V14.3 Simulation Methods Using Pseudospectral Acceleration Data, Seismol. Res. Lett., 86, no. 1, doi:10.1785/0220140118.
 +
# Anderson, J. G (2015) The Composite Source Model for Broadband Simulations of Strong Ground Motions Seismological Research Letters, January/February 2015, v. 86, p. 68-74, First published on December 17, 2014, doi:10.1785/0220140098
 +
# Atkinson, G. M., and Assatourians, K. (2015) Implementation and Validation of EXSIM (A Stochastic Finite‐Fault Ground‐Motion Simulation Algorithm) on the SCEC Broadband Platform Seismological Research Letters, January/February 2015, v. 86, p. 48-60, First published on December 17, 2014, doi:10.1785/0220140097
 +
# Crempien, J. G. F., and Archuleta, R. J. (2015) UCSB Method for Simulation of Broadband Ground Motion from Kinematic Earthquake Sources Seismological Research Letters, January/February 2015, v. 86, p. 61-67, First published on December 17, 2014, doi:10.1785/0220140103
 +
# Dreger, D. S., and Jordan, T. H. (2015) Introduction to the Focus Section on Validation of the SCEC Broadband Platform V14.3 Simulation Methods Seismological Research Letters, January/February 2015, v. 86, p. 15-16, doi:10.1785/0220140233
 +
# Graves, R., and Pitarka, A. (2015) Refinements to the Graves and Pitarka (2010) Broadband Ground‐Motion Simulation Method Seismological Research Letters, January/February 2015, v. 86, p. 75-80, First published on December 17, 2014, doi:10.1785/0220140101
 +
# Olsen, K. B., and Takedatsu, R. (2015) The SDSU Broadband Ground‐Motion Generation Module BBtoolbox Version 1.5 Seismological Research Letters, January/February 2015, v. 86, p. 81-88, First published on December 17, 2014, doi:10.1785/0220140102
 +
# Song, S.G. (2016) Developing a generalized pseudo-dynamic source model of Mw 6.5-7.0 to simulate strong ground motions, Geophysical Journal International, 204, 1254-1265. doi: 10.1093/gji/ggv521
 +
# Song, S.G., Dalguer, L.A. and Mai, P.M. (2014) Pseudo-dynamic source modeling with 1-point and 2-point statistics of earthquake source parameters, Geophysical Journal International, 196, 1770-1786. doi: 10.1093/gji/ggt479
  
Details about working with the development version are provided in the User Guide.
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The site response method written by RWGraves, included in the BBP, is based on this reference:
 +
#Stewart J.P., D.M. Boore, E. Seyhan, and G.M. Atkinson (2016). NGA-West2 equations for predicting vertical-component PGA, PGV, and 5%-damped PSA from shallow crustal earthquakes. Earthq. Spectra, 32 (2): 1005–1031.
  
The next version of Broadband is expected to be released in Q1 of 2015. <!--Here is our release schedule: [[Broadband_Platform_15_3_0]]. Here is a list of features and bugs that have been implemented and resolved since the last official release of the Broadband Platform: [[Broadband Trunk Release Notes]]
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== Related Entries ==
 
 
Additional details about this version is available here:
 
*[[Broadband Development Version]]
 
 
 
Details about an un-released development version of broadband are posted here:
 
*[[Broadband User Guide v11.7.0]]
 
-->
 
 
 
== Help ==
 
 
 
For assistance with the Broadband Platform, you may
 
* Email software @ scec.org with specific questions
 
* Browse and submit new trouble tickets, or feature requests, at [http://northridge.usc.edu/trac/broadband Broadband Trac site]. SCEC user login is required to submit trouble tickets this way.
 
 
 
== License ==
 
 
 
SCEC Broadband Platform software distributions are released under an Apache 2.0 open-source license as described here [[Broadband License]].
 
 
 
== Collaborators ==
 
 
 
*[http://www.erdw.ethz.ch/index_EN ETH Zurich - Swiss Federal Institute of Technology Zurich]
 
*[http://www.seismo.unr.edu University of Nevada Reno]
 
*[http://www.uwo.ca/earth/ University of Western Ontario]
 
*[http://peer.berkeley.edu Pacific Earthquake Engineering Research Center]
 
*[http://www.ce.berkeley.edu University of California, Berkeley]
 
*[http://www.geology.sdsu.edu/ San Diego State University Dept of Geological Sciences]
 
*[http://www.geol.ucsb.edu/ U.C. Santa Barbara Dept of Earth Sciences]
 
*[http://www.crustal.ucsb.edu/ UCSB Institute for Crustal Studies]
 
*[http://www.urscorp.com/ URS Corporation]
 
*[http://www.scec.org SCEC]
 
 
*[http://scec.usc.edu/scecpedia SCEC/CME Project]
 
*[http://scec.usc.edu/scecpedia SCEC/CME Project]
 
== Frequently Asked Questions (FAQ) ==
 
We post BBP user questions and our response to a Broadband Platform Frequently Asked Questions (FAQ) page:
 
* [[BBP FAQ]]
 
 
== See Also ==
 
*[[SWUS Project]]
 
*[[Broadband Platform 2007]]
 
*[http://scec.usc.edu/scecpedia/software SCEC Software Downloads]
 
*[http://scec.usc.edu/scecpedia SCEC Wiki Main]
 
*[http://www.scec.org SCEC Home Page]
 
*[[Broadband User Guide Current]]
 
*[[Broadband User Guide Development]]
 
*[[Broadband Server]]
 
*[[Broadband Hanging Wall Simulation]]
 
*[[Broadband Development]]
 
*[[Broadband Platform Installation Guide Current]]
 
*[[Broadband Platform User Guide Current]]
 
*[[BBP_14.10_Image]]
 
 
==References==
 
 
#Graves, R. W. and A. Pitarka (2010). “Broadband Ground-Motion Simulation Using a Hybrid Approach.” Bull. Seis. Soc. Am., 100(5A), pp. 2095-2123, doi: 10.1785/0120100057.  [http://hypocenter.usc.edu/research/broadband/documents/Graves_Pitarka_2010.pdf link]
 
#Mai, P.M., W. Imperatori, and K.B. Olsen (2010). “Hybrid broadband ground motion simulations: combining long-period deterministic synthetics with high frequency multiple S-to-S back-scattering.” Bull. Seis. Soc. Am., 100(5A), pp. 2124-2142, doi: 10.1785/0120080194. [http://hypocenter.usc.edu/research/broadband/documents/Mai_Imperatori_Olsen_2010.pdf link]
 
#Schmedes, J., R. J. Archuleta, and D. Lavallée (2010). “Correlation of earthquake source parameters inferred from dynamic rupture simulations.” J. Geophys. Res., 115, B03304, doi:10.1029/2009JB006689.  [http://hypocenter.usc.edu/research/broadband/documents/Schmedes_Archuleta_Lavallee_2010.pdf link]
 

Latest revision as of 18:43, 23 September 2022

Fig 1: Broadband Platform showing ground motion simulation methods (blue circles), and optional post-processing methods (green circles).

The Southern California Earthquake Center (SCEC) Broadband Platform (BBP) is a software system that can generate 0-20+ Hz seismograms for historical and scenario earthquakes in California, Eastern North America, and Japan using several alternative computational methods.

Current Release

The current release of the SCEC Broadband Platform software is available for download from:

This version was released in May 2022. BBP v22.4 includes several new capabilities. Details of the new features and capabilities of BBP v22.4 are described in the BBP v22.4 release notes. We recommend that all new users work with BBP v22.4 because this version adds new capabilities and improvements to the methods provided in earlier releases of the Broadband Platform. We recommend existing Broadband platform users migrate to BBP v22.4 whenever possible. Previous versions of the Broadband Platform will remain available for users that want to reproduce results produced with earlier versions of the Platform. Please review the BBP installation instructions for details on how to download and install BBP v22.4 on your local computer.

Overview

The goal of the SCEC Broadband Simulation Platform is to generate broadband (0-20+ Hz) ground motions for earthquakes. The SCEC Broadband Platform is a collaborative software development project involving SCEC researchers, research engineers, graduate students, and the SCEC/CME software development group. SCEC scientific groups have contributed modules to the Broadband Platform including kinematic rupture generation, low- and high-frequency seismogram synthesis using 3D wave propagation through 1D layered velocity structures, non-linear site effects, ground motion intensity measure calculations, and visualization. These complex scientific codes have been integrated into a system that supports easy on-demand computation of broadband seismograms, providing user-defined, repeatable calculation of ground-motion seismograms, using alternative simulation methods, and software utilities to generate tables, plots, and maps. The SCEC Broadband Platform is designed to be used by both scientific and engineering researchers with some experience interpreting ground motion simulations.

Users may calculate broadband seismograms for both historical earthquakes (validation events including Northridge, Loma Prieta, etc.) and user-defined earthquakes. The platform produces a variety of data products, including broadband seismograms, rupture visualizations, and several goodness-of-fit plots. When running a validation event, users supply their own simple source description, or provide a rupture description in SRF format. Users may specify their own list of stations or use a provided list.

The SCEC BBP software can be compiled and run on recent Linux systems with GNU compilers. The Broadband Platform continues to evolve, and new versions of the BBP are released periodically on GitHub. The latest release includes seven simulation methods, eight simulation regions covering California, Japan, Eastern North America, and the ability to compare simulation results against empirical ground motion models. The newest features include the ability to simulate multi-segment ruptures using several simulation methods. And, in addition to a new simulation method, it now includes improvements to several existing ground motion simulation methods and revised Green’s functions for all simulation regions. In this release, the site response module is integrated with all simulation methods and can also be used for comparing simulated data against historical earthquakes

The Broadband Platform is open-source software that is made available under the terms of the BSD-3 License. A copy of the License can be found with the software in the 'LICENSE' file in the GitHub repository.

Technical Support

For assistance with the Broadband Platform, you may

  • Email software @ scec.org with specific questions
  • Browse and submit new trouble tickets, or feature requests, at Broadband Issues Page.

Broadband Platform Developers and Collaborators

Broadband Publications

Supporting Presentation Materials

Frequently Asked Questions (FAQ)

We post BBP user questions and our response to a Broadband Platform Frequently Asked Questions (FAQ) page:

Related Wiki Entries

Older Broadband Platform Releases

Earlier version of the broadband platform software and data distributions are provided to support existing Broadband platform users. However, we recommend all users upgrade to the most recent version at first opportunity. Earlier releases can be found in the Broadband Platform Previous Releases page.

Acknowledging

Please support the Broadband Platform project by acknowledging the use of this software in your presentations and publications. Acknowledgements and citations help us obtain additional resources for continued development of the platform. If you use the Broadband Platform software for work resulting in an academic publication, we would appreciate it if one, or more, of the following paper is cited.

The primary reference for the Broadband Platform software system is:

  1. Maechling, P. J., F. Silva, S. Callaghan, and T. H. Jordan (2015). SCEC Broadband Platform: System Architecture and Software Implementation, Seismol. Res. Lett., 86, no. 1, doi: 10.1785/0220140125.

References for specific computational methods included in the Broadband Platform and for the validation procedures developed by the Broadband Platform include:

  1. Goulet, C.A., Abrahamson, N.A., Somerville, P.G. and K, E. Wooddell (2015) The SCEC Broadband Platform Validation Exercise: Methodology for Code Validation in the Context of Seismic-Hazard Analyses, Seismol. Res. Lett., 86, no. 1, doi: 10.1785/0220140104
  2. Dreger, D. S., Beroza, G.C., Day, S. M., Goulet, C. A., Jordan, T. H., Spudich, P. A., and Stewart, J. P. (2015). Validation of the SCEC Broadband Platform V14.3 Simulation Methods Using Pseudospectral Acceleration Data, Seismol. Res. Lett., 86, no. 1, doi:10.1785/0220140118.
  3. Anderson, J. G (2015) The Composite Source Model for Broadband Simulations of Strong Ground Motions Seismological Research Letters, January/February 2015, v. 86, p. 68-74, First published on December 17, 2014, doi:10.1785/0220140098
  4. Atkinson, G. M., and Assatourians, K. (2015) Implementation and Validation of EXSIM (A Stochastic Finite‐Fault Ground‐Motion Simulation Algorithm) on the SCEC Broadband Platform Seismological Research Letters, January/February 2015, v. 86, p. 48-60, First published on December 17, 2014, doi:10.1785/0220140097
  5. Crempien, J. G. F., and Archuleta, R. J. (2015) UCSB Method for Simulation of Broadband Ground Motion from Kinematic Earthquake Sources Seismological Research Letters, January/February 2015, v. 86, p. 61-67, First published on December 17, 2014, doi:10.1785/0220140103
  6. Dreger, D. S., and Jordan, T. H. (2015) Introduction to the Focus Section on Validation of the SCEC Broadband Platform V14.3 Simulation Methods Seismological Research Letters, January/February 2015, v. 86, p. 15-16, doi:10.1785/0220140233
  7. Graves, R., and Pitarka, A. (2015) Refinements to the Graves and Pitarka (2010) Broadband Ground‐Motion Simulation Method Seismological Research Letters, January/February 2015, v. 86, p. 75-80, First published on December 17, 2014, doi:10.1785/0220140101
  8. Olsen, K. B., and Takedatsu, R. (2015) The SDSU Broadband Ground‐Motion Generation Module BBtoolbox Version 1.5 Seismological Research Letters, January/February 2015, v. 86, p. 81-88, First published on December 17, 2014, doi:10.1785/0220140102
  9. Song, S.G. (2016) Developing a generalized pseudo-dynamic source model of Mw 6.5-7.0 to simulate strong ground motions, Geophysical Journal International, 204, 1254-1265. doi: 10.1093/gji/ggv521
  10. Song, S.G., Dalguer, L.A. and Mai, P.M. (2014) Pseudo-dynamic source modeling with 1-point and 2-point statistics of earthquake source parameters, Geophysical Journal International, 196, 1770-1786. doi: 10.1093/gji/ggt479

The site response method written by RWGraves, included in the BBP, is based on this reference:

  1. Stewart J.P., D.M. Boore, E. Seyhan, and G.M. Atkinson (2016). NGA-West2 equations for predicting vertical-component PGA, PGV, and 5%-damped PSA from shallow crustal earthquakes. Earthq. Spectra, 32 (2): 1005–1031.

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