Methods and Modules

Methods

To perform a simulation, a user selects a method, including optional modules. Currently, the Broadband Platform supports the following methods:

• Graves & Pitarka (GP)
• SDSU
• UCSB
• Composite Source Model (CSM - Under development)
• EXSIM
• SONG

Modules

The Broadband Platform consists of a series of modules. There are two main types of modules, science modules and utility modules. Science modules are those for which the platform has multiple implementations, provided by different coding research groups. Utility modules only have 1 implementation and are used by all simulations. A schematic of the available modules and their flow relationships is shown below in the following sections.

Science Modules

All simulations must include a module that creates synthetic seismograms. In some methods, there are separate low-frequency and high-frequency modules, while in other methods, these two steps are done by a single module. Rupture generation and site response are optional science modules. Users may select the following different implementations of each of these modules:

• Rupture generation: GP, UCSB, SONG
• Low-frequency: GP, UCSB, CSM, EXSIM
• High-frequency: GP, UCSB, SDSU, CSM, EXSIM
• Site response: GP, UCSB, SDSU

Post-processing Modules

A spectral response post-processing module is automatically run after the seismogram synthesis is completed and the optional site response module. Additionally, users may select an optional goodness-of-fit (GoF) utility module to run at the conclusion of the simulation. The Broadband Platform currently supports both the GP and SDSU GoF modules and the users can select to run one, or both (or none) of these modules.