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| Titel |
Investigation of the temporal fluctuations of the 1960–2010 seismicity of Caucasus |
| VerfasserIn |
L. Telesca, T. Matcharashvili, T. Chelidze |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 6 ; Nr. 12, no. 6 (2012-06-15), S.1905-1909 |
| Datensatznummer |
250010922
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1905-2012.pdf |
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| Zusammenfassung |
| The time-clustering behaviour of the seismicity of the Caucasus spanning
from 1960 to 2010 was investigated. The analysis was performed on the whole
and aftershock-depleted catalogues by means of the method of Allan Factor,
which permits the identification and quantification of time-clustering in
point processes. The whole sequence is featured by two scaling regimes with
the scaling exponent at intermediate timescales lower than that at high
timescales, and a crossover that could be probably linked with aftershock
time activiation. The aftershock-depleted sequence is characterized by
higher time-clustering degree and the presence of a periodicity probably
correlated with the cyclic earth surface load variations on regional and
local scales, e.g. with snow melting in Caucasian mountains and large Enguri
dam operations. The obtained results were corroborated by the application of
two surrogate methods: the random shuffling and the generation of Poissonian
sequences. |
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