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Stress Shadows Determined from a Phase Dynamical Measure of Historic Seismicity

Kristy F. Tiampo, John B. Rundle, & William Klein

Published December 2006, SCEC Contribution #812

The Pattern Informatics (PI) technique (tiampo et al., 2002) is founded on the premise that changes in the seismicity rate are a proxy for changes in the underlying stress. These stress changes are correlated over large spatial regions, and can be quantified using a phase dynamical analysis of the changes in historic seismicity rates. This new approach to the study of seismicity quantifies its local and regional space-time patterns and identifies regions of local quiescence or activation. Here we study those local changes in an attempt to objectively quantify short-term stress shadow regions. We determine that, while persistent stress shadows are detectable with this method, they do not occur uniformly throughout the spatio-temporal region.

Tiampo, K. F., Rundle, J. B., & Klein, W. (2006). Stress Shadows Determined from a Phase Dynamical Measure of Historic Seismicity. Pure and Applied Geophysics, 163(11-12), 2407-2416. doi: 10.1007/s00024-006-0134-y.