Multi Segment Fault Rupture Modeling and Strong Ground Motion Simulation Using Irikura, Japan Recipe: Implementation in the in SCEC BB Platform
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
The project had two main objectives. The first objective was to complete the implementation of an earthquake rupture generator based on the method proposed by Irikura and Miyake, also known as Irikura recipe (IM2011 method hereafter), in the BBP by extending its formulation to multi-segment rupture, and developing the software infrastructure. The second objective was to investigate the possibility of using the earthquake rupture generator as a standalone BBP rupture module that can be attached to other strong ground motion simulation methods already in use in the BBP. We successfully tested and validated the IM2011 multi-segment rupture generator in conjunction with Graves and Pitarka method (GP, hereafter) one of the BBP methods, and performed simulations of the M7.0 2016 Kumamoto, Japan earthquake. IM2011 is the most popular method in Japan that is used to simulate strong ground motion from Japanese crustal earthquakes. In response to technical requirements of the BBP, we made Irikura’s rupture generator procedure compatible with multi-segment rupture modeling approach, currently being adopted by BBP. The recipe is now fully functional on the BBP. This project benefited from the collaboration of the PI with professor Kojiro Irikura of Aichi Institute of Technology, Japan, assistant professor Hiroe Miyake of University of Tokyo, head of the Japanese side of collaboration with SCEC, and Dr.Iwaki and Dr. Morikawa, researchers at NIED, during which we identified rupture parameters that needed to be adjusted and investigated.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1544495
- Report Number(s):
- LLNL-TR-773235; 965424
- Country of Publication:
- United States
- Language:
- English
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