Statistical Properties of Seismicity of Fault Zones at Different Evolutionary Stages

Gregor Hillers, Paul M. Mai, Yehuda Ben-Zion, & Jean-Paul Ampuero

Published May 2007, SCEC Contribution #1045

We perform a systematic parameter space study of the seismic response of a large fault with different levels of heterogeneity, using a 3-D elastic framework within the continuum limit. The fault is governed by rate-and-state friction and simulations are performed for model realizations with frictional and large scale properties characterized by different ranges of size scales. We use a number of seismicity and stress functions to characterize different types of seismic responses and test the correlation between hypocenter locations and the employed distributions of model parameters. The simulated hypocenters are found to correlate significantly with small L values of the rate-and-state friction. The final sizes of earthquakes are correlated with physical properties at their nucleation sites. The obtained stacked scaling relations are overall self-similar and have good correspondence with properties of natural earthquakes.

Citation
Hillers, G., Mai, P. M., Ben-Zion, Y., & Ampuero, J. (2007). Statistical Properties of Seismicity of Fault Zones at Different Evolutionary Stages. Geophysical Journal International, 169(2), 515-533. doi: 10.1111/j.1365-246X.2006.03275.x.