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Modelling fluid induced seismicity on a nearby active fault
Date Issued
2013-09
Date Available
2014-02-28T09:17:16Z
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.
Type of Material
Journal Article
Publisher
Oxford University Press
Journal
Geophysical Journal International
Volume
194
Issue
3
Start Page
1613
End Page
1624
Copyright (Published Version)
2013, the Authors
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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