Mildon, ZK;
Toda, S;
Faure Walker, JP;
Roberts, GP;
(2016)
Evaluating models of Coulomb stress transfer: Is variable fault geometry important?
Geophysical Research Letters
, 43
(24)
12,407-12,414.
10.1002/2016GL071128.
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Abstract
To determine the importance of receiver fault geometry in Coulomb stress calculations a new methodology is presented to model faults with variable geometry. Although most models use planar faults, it is known that these are inaccurate representations of faults observed in the field. The central Italian Apennines are chosen as a straightforward tectonic system with well-exposed normal faults to investigate the effect of variable geometry. It is shown that the static Coulomb stress transfer is most sensitive to changes in strike of the receiver faults, rather than changes in dip and rake. Therefore, a novel methodology to generate strike-variable faults composed of discrete rectangular patches is developed. Using the 2009 L'Aquila earthquake (Mw = 6.3) the calculated stress transferred to planar versus variable faults is assessed. The stress transferred to variable faults is sufficiently different when compared to planar cases to merit other earthquake sequences being reassessed with available fault geometry.
| Type: | Article |
|---|---|
| Title: | Evaluating models of Coulomb stress transfer: Is variable fault geometry important? |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/2016GL071128 |
| Publisher version: | http://dx.doi.org/10.1002/2016GL071128 |
| Language: | English |
| Additional information: | Copyright © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Coulomb stress transfer; normal faults; variable fault geometry |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Inst for Risk and Disaster Reduction |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1534621 |
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