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| Titel |
Dynamical segmentation and rupture patterns in a "toy" slider-block model for earthquakes |
| VerfasserIn |
J. B. Rundle, W. Klein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 2, no. 2 ; Nr. 2, no. 2, S.61-79 |
| Datensatznummer |
250000475
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| Publikation (Nr.) |
 copernicus.org/npg-2-61-1995.pdf |
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| Zusammenfassung |
| Lattice models for earthquakes have been shown to capture some
of the dynamical properties possessed by natural fault systems. These properties include:
1) a scaling (power low) region in the curve representing event frequency as a function of
magnitude and area; and 2) space-time clustering of events. To understand the physical
origin of these and other effects, we examine the simplest kind of "toy" slider
block model. We obtain results indicating that this model displays several additional
kinds of phenomena seen in real earthquake faults, even though "realistic"
physics is missing from the model. Asperity-like slip distributions in this model arise
from strong elastic coupling, rather than the spatially heterogeneous frictional strength
often inferred for real faults. Simulation results indicate that
"characteristic" earthquakes can be produced as a consequence of the nonlinear
dynamics. Thus segmentation on faults may be a result of the nonlinear dynamics as well as
being due to geometric properties of fault systems. These conclusions may be modified when
more "realistic" physics is added to the model, although the presence of
dynamical effects in the toy model calculations similar to those observed in nature
demonstrates alternative possibilities for the origin of these effects. |
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