Event Size Distribution in Simple Multi-fault Systems

Langer, Sebastian, Finzi, Yaron and Weatherley, Dion (2010). Event Size Distribution in Simple Multi-fault Systems. In: 7th ACES International Workshop, Otaru, Japan, (). 3-8 October 2010.

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Author Langer, Sebastian
Finzi, Yaron
Weatherley, Dion
Title of paper Event Size Distribution in Simple Multi-fault Systems
Conference name 7th ACES International Workshop
Conference location Otaru, Japan
Conference dates 3-8 October 2010
Publication Year 2010
Year available 2010
Sub-type Poster
Abstract/Summary It has been noted that earthquakes rupture over step-overs. We model a non-overlapping fault-system with 2 dilational step-overs. Rupture is modelled dynamically using the Finite Element Method with elasto-plasticity along the interface and elasticity in the model region. We use the Mohr-Coulomb Failure Criterion to determine plastic displacement at the fault. We apply homogeneous friction, no cohesion and an initially homogeneous stress distribution throughout the model region. Preliminary results show that for wider step-overs system-size earthquakes are less frequent and fault-size earthquakes become more frequent. FOr step-over widths less than 5km, system-size ruptures comprise 15-20% of all large earthquakes. This decreases to 4-5% for step-over widths exceeding 5 km.
Subjects 260200 Geophysics
260000 Earth Sciences
04 Earth Sciences
260206 Earthquake Seismology
Keyword earthquake dynamics
Earthquake Rupture
Earthquake Faults
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Hosted by CREST Earthquake & Tsunami Predictive Simulation Project Team. -- Poster no. 16

Document type: Conference Paper
Collections: Non HERDC
Earth Systems Science Computational Centre Publications
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Created: Thu, 25 Nov 2010, 16:23:38 EST by Mr Sebastian Langer on behalf of Earth Systems Science Computational Centre