pure and applied geophysics

, Volume 163, Issue 11–12, pp 2407–2416 | Cite as

Stress Shadows Determined from a Phase Dynamical Measure of Historic Seismicity



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.


Seismicity stress shadows earthquake physics seismic hazard 


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Copyright information

© Birkhäuser Verlag, Basel, 2006

Authors and Affiliations

  1. 1.Department of Earth SciencesUniversity of Western OntarioLondonCanada
  2. 2.Center for Computational Science and Engineering and Department of PhysicsUniversity of CaliforniaDavisU.S.A
  3. 3.Department of PhysicsBoston UniversityBostonU.S.A

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