La Habra Simulations on Titan
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Overview
A series of simulations modelling the La Habra 5.1 event will be performed on ORNL Titan with in order to address these scientific and computational goals:
- Demonstrate that Hercules-GPU software is in production status and evaluate its performance versus the CPU version
- Evaluate goodness of fit for synthetic waveforms versus observed at 1.0 Hz, using Po Chen's updated CVM-S4 velocity model as the material properties source for the simulation.
- [Optionally] Validate the simulation results generated by Hercules-GPU and AWP-GPU
Solver Parameters
| Parameter | Value | Notes |
|---|---|---|
| Frequency | 1.0 Hz | |
| Simulation Length | 100 s | |
| Delta T | 0.005 | |
| Plane Output Resolution | 250m | |
| I/O Print Rate | every 10 steps | |
| Station List | File:LH master.list | Merged from En-Jui's 0.2Hz station list and Ricardo's CH master list |
| Software Version | Hercules-GPU i3 | GPU codes, no frequency dependent Q |
Simulation Box / Velocity Model
| Parameter | Value | Notes |
|---|---|---|
| Dimensions (km) | 180 x 135 x 61.875 | |
| Bounding Box (LL) | -119.288842 34.120549, -118.354016 35.061096, -116.846030 34.025873, -117.780976 33.096503 | |
| UCVM Version | 13.9.0 | No heterogeneities |
| Velocity Model Versions | CVM-S4, CVM-S4 v26, CVM-S5 | |
| Miniumum Vs | 200 m/s | |
| Samples per wavelength | 8 | |
| Hercules Etree | ch-cvms400-100-4hz-200ms.e, ch-cvms426-223-4hz-200ms.e | CVM-S5 etree? |
Sources
The simulation will be repeated for two point sources and one extended source.
Point Source Parameters
| Parameter | Value | Notes |
|---|---|---|
| Event Name | La Habra | |
| Origin Time | 2014/03/29 04:09:42.97 | Source: En-Jui |
| Origin Location | -117.930; 33.922; 5.0km | Source: En-Jui |
| Strike/Dip/Rake 1 | 134/55/155 | Source: En-Jui, initial |
| Strike/Dip/Rake 2 | 239/70/38 | Source: En-Jui, based on review of aftershock sequence |
| Rise Time | 0.75 s |
SRC Format La Habra Source
- MAGNITUDE = 5.12
- FAULT_LENGTH = 5.0
- FAULT_WIDTH = 2.25
- DEPTH_TO_TOP = 4.7125
- STRIKE = 239
- RAKE = 38
- DIP = 79
- LAT_TOP_CENTER = 33.9119
- LON_TOP_CENTER = -117.940
- HYPO_ALONG_STK = 0.0
- HYPO_DOWN_DIP = 1.125
- DLEN = 0.1
- DWID = 0.1
BBP Run for La Habra
La Habra Earthquake Observations
La Habra References
References
- Bielak, J., H. Karaoglu, and R. Taborda, 2011. Memory-efficient displacement-based internal friction for wave propagation simulation, Geophysics, 76(6):T131-T145.
- Taborda, R., Lopez, J., Karaoglu, H., Urbanic, J., and Bielak, J. (2010). Speeding up finite element wave propagation for large-scale earthquake simulations. Technical Report CMU-PDL-10-109, Carnegie Mellon University, Parallel Data Lab.
- Tu, T., Yu, H., Ramírez-Guzmán, L., Bielak, J., Ghattas, O., Ma, K.-L., & O’Hallaron, D.R., 2006. From mesh generation to scientific visualization: an end-to-end approach to parallel supercomputing, in Proceedings of the 2006 ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis, p. 15, IEEE Computer Society, Tampa, Florida.
