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Structural constraints on the spatial distribution of aftershocks

McCloskey, J, Nalbant, SS, Steacy, S, Nostro, C, Scotti, O and Baumont, D (2003) Structural constraints on the spatial distribution of aftershocks. GEOPHYSICAL RESEARCH LETTERS, 30 (12). p. 1610. [Journal article]

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DOI: 10.1029/2003GL017225


[1] Calculations of static stress changes due to large earthquakes have shown that the spatial distribution of aftershocks is predictable to first order, with aftershocks primarily occurring in areas experiencing positive stress changes. Delineation of these areas relies on resolving the stress perturbation onto planes with known orientations; common practice is to use poorly constrained regional stress information to compute optimally oriented failure planes, assuming that they exist everywhere. Here we show that this assumption is not supported by observation but rather that aftershock failure planes are controlled by geological structure. We argue that useful aftershock hazard estimates are better made by replacing information on regional stress with statistical measures of structural orientations.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute
ID Code:421
Deposited By: Professor Sandy Steacy
Deposited On:05 Nov 2009 14:02
Last Modified:04 Oct 2017 16:12

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