Difference between revisions of "Broadband Platform"
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*[[Broadband Development Version]] | *[[Broadband Development Version]] |
Revision as of 22:29, 19 March 2015
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.
Contents
- 1 Overview
- 2 Description
- 3 Current Release
- 4 Dependencies
- 5 Documentation
- 6 Downloads
- 7 Current Broadband Platform Release
- 8 Older Broadband Platform Releases
- 9 Supporting Materials
- 10 Development version
- 11 Help
- 12 License
- 13 Collaborators
- 14 Frequently Asked Questions (FAQ)
- 15 See Also
- 16 References
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
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.
Dependencies
Broadband has the following dependencies:
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 non-commercial account with Intel and downloading the compilers from the Intel website.
Documentation
User Guide Wiki (includes installation instructions):
Downloads
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.
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.
There are detailed installation instructions in the Broadband User Guide v14.3.0.
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:
- 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.
- 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.
- 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:
Version | Release Date | Files | User Guide | ||
---|---|---|---|---|---|
Source Code | Green's Functions Packages | Validations Packages | |||
14.3.0 | 03/31/2014 | Send email to software@scec.org to request a copy, | Central Japan, Central Japan.md5
Western Japan, Western Japan.md5 |
Loma Prieta, Loma Prieta.md5 | Broadband User Guide v14.3.0 |
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.
Supporting Materials
- Broadband Platform Presentation - SSA 2011 - Robert Graves (5MB pptx file)
- Broadband poster from AGU 2010 (PDF, 882 KB)
- Broadband overview talk from SC10 (PPT, 3.7 MB)
- Technical diagrams of Broadband module relationships (PPTX, 16 KB)
Development version
If you're interested in working with the latest development version of the platform, you can check it out from
svn co https://source.usc.edu/svn/broadband/trunk
Details about working with the development version are provided in the User Guide.
The next version of Broadband is expected to be released in Q1 of 2015.
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 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
- ETH Zurich - Swiss Federal Institute of Technology Zurich
- University of Nevada Reno
- University of Western Ontario
- Pacific Earthquake Engineering Research Center
- University of California, Berkeley
- San Diego State University Dept of Geological Sciences
- U.C. Santa Barbara Dept of Earth Sciences
- UCSB Institute for Crustal Studies
- URS Corporation
- SCEC
- SCEC/CME Project
Frequently Asked Questions (FAQ)
We post BBP user questions and our response to a Broadband Platform Frequently Asked Questions (FAQ) page:
See Also
- SWUS Project
- Broadband Platform 2007
- SCEC Software Downloads
- SCEC Wiki Main
- 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
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. 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. 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. link