Abstract:
:Injection-induced earthquakes pose a serious seismic hazard but also offer an opportunity to gain insight into earthquake physics. Currently used models relating the maximum magnitude of injection-induced earthquakes to injection parameters do not incorporate rupture physics. We develop theoretical estimates, validated by simulations, of the size of ruptures induced by localized pore-pressure perturbations and propagating on prestressed faults. Our model accounts for ruptures growing beyond the perturbed area and distinguishes self-arrested from runaway ruptures. We develop a theoretical scaling relation between the largest magnitude of self-arrested earthquakes and the injected volume and find it consistent with observed maximum magnitudes of injection-induced earthquakes over a broad range of injected volumes, suggesting that, although runaway ruptures are possible, most injection-induced events so far have been self-arrested ruptures.
journal_name
Sci Advjournal_title
Science advancesauthors
Galis M,Ampuero JP,Mai PM,Cappa Fdoi
10.1126/sciadv.aap7528subject
Has Abstractpub_date
2017-12-20 00:00:00pages
eaap7528issue
12issn
2375-2548pii
aap7528journal_volume
3pub_type
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