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| Titel |
Reproducing the scaling laws for Slow and Fast ruptures |
| VerfasserIn |
Pierre Romanet, Harsha Bhat, Raúl Madariaga |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250141648
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| Publikation (Nr.) |
 EGU/EGU2017-5181.pdf |
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| Zusammenfassung |
| Modelling long term behaviour of large, natural fault systems, that are geometrically
complex, is a challenging problem. This is why most of the research so far has concentrated
on modelling the long term response of single planar fault system. To overcome this
limitation, we appeal to a novel algorithm called the Fast Multipole Method which was
developed in the context of modelling gravitational N-body problems. This method allows us
to decrease the computational complexity of the calculation from O(N2) to O(N log N),
N being the number of discretised elements on the fault. We then adapted this
method to model the long term quasi-dynamic response of two faults, with step-over
like geometry, that are governed by rate and state friction laws. We assume the
faults have spatially uniform rate weakening friction. The results show that when
stress interaction between faults is accounted, a complex spectrum of slip (including
slow-slip events, dynamic ruptures and partial ruptures) emerges naturally. The
simulated slow-slip and dynamic events follow the scaling law inferred by Ide et al.
2007 i. e. M ∝ T for slow-slip events and M ∝ T2 (in 2D) for dynamic events. |
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