This validation mode allows modelers to develop, test, and calibrate their simulation methods and enables users to compare results across multiple simulation methods. The simulation results also include a comparison to empirical ground motion models.
The BBP then produces a variety of data products, including broadband seismograms, rupture plane visualizations, and several goodness-of-fit plots comparing simulations and recorded data by spectral period, distance, and on maps. When running a validation event, users can supply their own simple source description (basic geometry, rake, magnitude, dip, etc.), or provide a rupture description in SRF format if they have one. Right: The GP method (as example) includes a rupture generator, low and high-frequency modules, and site response module. Each simulation method is created by combining a specific set of scientific modules. Left: List of scientific methods available in the SCEC Broadband Platform. The SCEC Broadband Platform currently includes a collection of 21 historical events (13 in California, 4 in Japan, 3 in Eastern North America, and 1 in Italy), with readily available recordings at selected stations that can be used to validate simulation methods and/or input parameters. There are currently seven simulation methods implemented in the BBP and any of them can be run using the same set of text input files for the source and velocity models to be used. Users may use the SCEC BBP to calculate broadband seismograms for both historical earthquakes and user-defined scenario earthquakes. Sample slip distribution generated on the SCEC Broadband Platform for a three-segment simulation of the M7.2 1992 Landers earthquake. The SCEC BBP is designed to be used by both geophysicists and engineering researchers with some experience interpreting ground motion simulations.
#3D EARTHQUAKE SIMULATION SOFTWARE#
These complex scientific codes have been carefully 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 comparison tables, plots, and maps. The current boundary limit between low and high frequencies, for methods that use an hybrid approach is 1 Hz.
The BBP software modules implement 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 tools.
#3D EARTHQUAKE SIMULATION DOWNLOAD#
The latest Broadband Platform release, version 19.8.0, is available for download on GitHub. A team of SCEC researchers including scientists, engineers, and computer scientists develop, verify, and validate the scientific models and analysis codes in the platform and then release them as open-source software. The SCEC Broadband Platform (BBP) is a collection of open-source codes used to simulate broadband (0-20+ Hz) ground motions for historical and scenario earthquakes.