Structural constraints on the spatial distribution of aftershocks

J McCloskey, SS Nalbant, S Steacy, C Nostro, O Scotti, D Baumont

    Research output: Contribution to journalArticle

    46 Citations (Scopus)

    Abstract

    [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.
    LanguageEnglish
    Pages1610
    JournalGeophysical Research Letters
    Volume30
    Issue number12
    DOIs
    Publication statusPublished - Jun 2003

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    aftershock
    spatial distribution
    stress change
    geological structure
    perturbation
    hazard
    earthquake

    Cite this

    McCloskey, J., Nalbant, SS., Steacy, S., Nostro, C., Scotti, O., & Baumont, D. (2003). Structural constraints on the spatial distribution of aftershocks. Geophysical Research Letters, 30(12), 1610. https://doi.org/10.1029/2003GL017225
    McCloskey, J ; Nalbant, SS ; Steacy, S ; Nostro, C ; Scotti, O ; Baumont, D. / Structural constraints on the spatial distribution of aftershocks. In: Geophysical Research Letters. 2003 ; Vol. 30, No. 12. pp. 1610.
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    McCloskey, J, Nalbant, SS, Steacy, S, Nostro, C, Scotti, O & Baumont, D 2003, 'Structural constraints on the spatial distribution of aftershocks', Geophysical Research Letters, vol. 30, no. 12, pp. 1610. https://doi.org/10.1029/2003GL017225

    Structural constraints on the spatial distribution of aftershocks. / McCloskey, J; Nalbant, SS; Steacy, S; Nostro, C; Scotti, O; Baumont, D.

    In: Geophysical Research Letters, Vol. 30, No. 12, 06.2003, p. 1610.

    Research output: Contribution to journalArticle

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    McCloskey J, Nalbant SS, Steacy S, Nostro C, Scotti O, Baumont D. Structural constraints on the spatial distribution of aftershocks. Geophysical Research Letters. 2003 Jun;30(12):1610. https://doi.org/10.1029/2003GL017225