 |
| Titel |
Self-organization of spatio-temporal earthquake clusters |
| VerfasserIn |
S. Hainzl, G. Zöller, J. Kurths |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 7, no. 1/2 ; Nr. 7, no. 1/2, S.21-29 |
| Datensatznummer |
250004240
|
| Publikation (Nr.) |
 copernicus.org/npg-7-21-2000.pdf |
|
|
|
|
|
| Zusammenfassung |
| Cellular automaton versions of the
Burridge-Knopoff model have been shown to reproduce the power law distribution
of event sizes; that is, the Gutenberg-Richter law. However, they have failed to
reproduce the occurrence of foreshock and aftershock sequences correlated with
large earthquakes. We show that in the case of partial stress recovery due to
transient creep occurring subsequently to earthquakes in the crust, such
spring-block systems self-organize into a statistically stationary state
characterized by a power law distribution of fracture sizes as well as by
foreshocks and aftershocks accompanying large events. In particular, the
increase of foreshock and the decrease of aftershock activity can be described
by, aside from a prefactor, the same Omori law. The exponent of the Omori law
depends on the relaxation time and on the spatial scale of transient creep.
Further investigations concerning the number of aftershocks, the temporal
variation of aftershock magnitudes, and the waiting time distribution support
the conclusion that this model, even "more realistic" physics in
missed, captures in some ways the origin of the size distribution as well as
spatio-temporal clustering of earthquakes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|