Postseismic deformation following the Mw 7.2, 23October 2011 Van earthquake (Turkey): Evidence for a seismic fault reactivation

Ugur Dogan, Deniz Demir, Ziyadin Cakir, Semih Ergintav, Haluk Ozener, Ahmet Akoglu, Suleyman S Nalbant, Robert Reilinger

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Geodetic measurements following the 23 October 2011, Mw = 7.2 Van (eastern Turkey)earthquake reveal that a fault splay on the footwall block of the coseismic thrust fault was reactivated and slipped aseismically for more than 1.5 years following the earthquake. Although long-lasting aseismic slip on coseismic ruptures has been documented following many large earthquakes, long-lasting, triggered slip on neighboring faults that did not rupture during the earthquake has not been reported previously. Elastic dislocation and Coulomb stress modeling indicate that the postseismic deformation can be adequately explained by shallow slip on both the coseismic and splay fault and is likely driven mostly by coseismic stress changes. Thus, the slip deficit on the shallow section of the coseismic fault indicated by interferometric synthetic aperture radar-based models has been partially filled by aseismic slip, suggesting a lower likelihood for a large earthquake on the shallow section of the Van fault than suggested by previous studies.
    LanguageEnglish
    Pages2334-2341
    JournalGeophysical Research Letters
    Volume41
    DOIs
    Publication statusPublished - 7 Apr 2014

    Fingerprint

    Turkey
    trucks
    reactivation
    slip
    earthquakes
    earthquake
    rupture
    stress change
    synthetic aperture radar
    footwall
    thrust fault
    dislocation
    modeling

    Keywords

    • 2011 Van earthquake
    • afterslip
    • coseismic stress change

    Cite this

    Dogan, Ugur ; Demir, Deniz ; Cakir, Ziyadin ; Ergintav, Semih ; Ozener, Haluk ; Akoglu, Ahmet ; Nalbant, Suleyman S ; Reilinger, Robert. / Postseismic deformation following the Mw 7.2, 23October 2011 Van earthquake (Turkey): Evidence for a seismic fault reactivation. In: Geophysical Research Letters. 2014 ; Vol. 41. pp. 2334-2341.
    @article{127de8f97094412fa0e85e33d853744c,
    title = "Postseismic deformation following the Mw 7.2, 23October 2011 Van earthquake (Turkey): Evidence for a seismic fault reactivation",
    abstract = "Geodetic measurements following the 23 October 2011, Mw = 7.2 Van (eastern Turkey)earthquake reveal that a fault splay on the footwall block of the coseismic thrust fault was reactivated and slipped aseismically for more than 1.5 years following the earthquake. Although long-lasting aseismic slip on coseismic ruptures has been documented following many large earthquakes, long-lasting, triggered slip on neighboring faults that did not rupture during the earthquake has not been reported previously. Elastic dislocation and Coulomb stress modeling indicate that the postseismic deformation can be adequately explained by shallow slip on both the coseismic and splay fault and is likely driven mostly by coseismic stress changes. Thus, the slip deficit on the shallow section of the coseismic fault indicated by interferometric synthetic aperture radar-based models has been partially filled by aseismic slip, suggesting a lower likelihood for a large earthquake on the shallow section of the Van fault than suggested by previous studies.",
    keywords = "2011 Van earthquake, afterslip, coseismic stress change",
    author = "Ugur Dogan and Deniz Demir and Ziyadin Cakir and Semih Ergintav and Haluk Ozener and Ahmet Akoglu and Nalbant, {Suleyman S} and Robert Reilinger",
    year = "2014",
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    Dogan, U, Demir, D, Cakir, Z, Ergintav, S, Ozener, H, Akoglu, A, Nalbant, SS & Reilinger, R 2014, 'Postseismic deformation following the Mw 7.2, 23October 2011 Van earthquake (Turkey): Evidence for a seismic fault reactivation', Geophysical Research Letters, vol. 41, pp. 2334-2341. https://doi.org/10.1002/2014GL059291

    Postseismic deformation following the Mw 7.2, 23October 2011 Van earthquake (Turkey): Evidence for a seismic fault reactivation. / Dogan, Ugur; Demir, Deniz; Cakir, Ziyadin; Ergintav, Semih; Ozener, Haluk; Akoglu, Ahmet; Nalbant, Suleyman S; Reilinger, Robert.

    In: Geophysical Research Letters, Vol. 41, 07.04.2014, p. 2334-2341.

    Research output: Contribution to journalArticle

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    AU - Dogan, Ugur

    AU - Demir, Deniz

    AU - Cakir, Ziyadin

    AU - Ergintav, Semih

    AU - Ozener, Haluk

    AU - Akoglu, Ahmet

    AU - Nalbant, Suleyman S

    AU - Reilinger, Robert

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    AB - Geodetic measurements following the 23 October 2011, Mw = 7.2 Van (eastern Turkey)earthquake reveal that a fault splay on the footwall block of the coseismic thrust fault was reactivated and slipped aseismically for more than 1.5 years following the earthquake. Although long-lasting aseismic slip on coseismic ruptures has been documented following many large earthquakes, long-lasting, triggered slip on neighboring faults that did not rupture during the earthquake has not been reported previously. Elastic dislocation and Coulomb stress modeling indicate that the postseismic deformation can be adequately explained by shallow slip on both the coseismic and splay fault and is likely driven mostly by coseismic stress changes. Thus, the slip deficit on the shallow section of the coseismic fault indicated by interferometric synthetic aperture radar-based models has been partially filled by aseismic slip, suggesting a lower likelihood for a large earthquake on the shallow section of the Van fault than suggested by previous studies.

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