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| Titel |
Correlated earthquakes in a self-organized model |
| VerfasserIn |
M. Baiesi |
| 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 ; 16, no. 2 ; Nr. 16, no. 2 (2009-03-30), S.233-240 |
| Datensatznummer |
250013134
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| Publikation (Nr.) |
 copernicus.org/npg-16-233-2009.pdf |
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| Zusammenfassung |
| Motivated by the fact that empirical time series of earthquakes
exhibit long-range correlations in space and time and
the Gutenberg-Richter distribution of magnitudes, we propose a simple
fault model that can account for these types of scale-invariance.
It is an avalanching process that displays power-laws in the event sizes,
in the epicenter distances as well as in the waiting-time distributions,
and also aftershock rates obeying a generalized Omori law.
We thus confirm that there is a relation between temporal and
spatial clustering of the activity in this kind of models.
The fluctuating boundaries of possible slipping areas show that
the size of the largest possible earthquake is not always maximal, and the
average correlation length is a fraction of the system size.
This suggests that there is a concrete alternative to
the extreme interpretation of self-organized criticality as
a process in which every small event can cascade to an arbitrary large one:
the new picture includes fluctuating domains of coherent stress
field as part of the global self-organization. Moreover,
this picture can be more easily compared with other scenarios discussing
fluctuating correlations lengths in seismicity. |
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