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On Shaky Ground


Many centers of economic, financial and cultural interest are located in seismically active areas. One important example of such an area is Southern California. The southernmost part of the San Andreas Fault in this region has not produced a major earthquake for more than 300 years, and the next large event is expected in the near future. Seismologists are trying to understand the impact of such large earthquakes through scenario-based simulations by using the latest compute resources on TeraGrid. In this scenario, named ShakeOut-D, southern California experiences an earthquake of magnitude 7.8 on the San Andreas Fault. This image shows the horizontal velocity of seismic waves 100 seconds after the earthquake. The warmer, orange colors indicate ground moving toward the right, while the colder bluish colors indicate ground moving toward the left.
Credit: A. Chourasia, Y. Cui, SDSC/UCSD; K. Olsen, SCEC.
Source: San Diego Supercomputer Center, UC San Diego

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