Modelling fluid induced seismicity on a nearby active fault

S Murphy, GS O'Brien, J McCloskey, CJ Bean, S Nalbant

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    We present a numerical investigation of the effect that static stress perturbations due to fluid injection have on a nearby active fault where the fluid does not come in physical contact with the fault. Our modelling employs a lattice Boltzmann pore diffusion model coupled with a quasi-dynamic earthquake rupture model. As diffusivities and frictional parameters can be defined independently at individual nodes/cells this allows us to replicate complex 3-D geological media in our simulations. We demonstrate the effect an injection can have on an active nearby fault. Compared with our control catalogue (identical to the original simulation but without the injection), the injection not only altered the timing of the next earthquake sequence, it also changed its size, producing a Mw 6.7 event, the largest observed earthquake on the fault. This large event pushes the fault into a subcritical state from which it took roughly 200 yr of continuous tectonic loading for the fault to return to a critical state.
    LanguageEnglish
    Pages1613-1624
    JournalGeophysical Journal International
    Volume194
    Issue number3
    DOIs
    Publication statusPublished - Sep 2013

    Fingerprint

    induced seismicity
    active fault
    Earthquakes
    earthquakes
    injection
    Fluids
    fluid
    fluids
    fluid injection
    modeling
    Tectonics
    earthquake
    Contacts (fluid mechanics)
    earthquake rupture
    diffusivity
    catalogs
    critical state
    tectonics
    simulation
    time measurement

    Cite this

    Murphy, S., O'Brien, GS., McCloskey, J., Bean, CJ., & Nalbant, S. (2013). Modelling fluid induced seismicity on a nearby active fault. Geophysical Journal International, 194(3), 1613-1624. https://doi.org/10.1093/gji/ggt174
    Murphy, S ; O'Brien, GS ; McCloskey, J ; Bean, CJ ; Nalbant, S. / Modelling fluid induced seismicity on a nearby active fault. In: Geophysical Journal International. 2013 ; Vol. 194, No. 3. pp. 1613-1624.
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    Murphy, S, O'Brien, GS, McCloskey, J, Bean, CJ & Nalbant, S 2013, 'Modelling fluid induced seismicity on a nearby active fault', Geophysical Journal International, vol. 194, no. 3, pp. 1613-1624. https://doi.org/10.1093/gji/ggt174

    Modelling fluid induced seismicity on a nearby active fault. / Murphy, S; O'Brien, GS; McCloskey, J; Bean, CJ; Nalbant, S.

    In: Geophysical Journal International, Vol. 194, No. 3, 09.2013, p. 1613-1624.

    Research output: Contribution to journalArticle

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    Murphy S, O'Brien GS, McCloskey J, Bean CJ, Nalbant S. Modelling fluid induced seismicity on a nearby active fault. Geophysical Journal International. 2013 Sep;194(3):1613-1624. https://doi.org/10.1093/gji/ggt174