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| Titel |
Dynamics of multifractal and correlation characteristics of the spatio-temporal distribution of regional seismicity before the strong earthquakes |
| VerfasserIn |
D. Kiyashchenko, N. Smirnova, V. Troyan, F. Vallianatos |
| 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 ; 3, no. 3/4 ; Nr. 3, no. 3/4, S.285-298 |
| Datensatznummer |
250000689
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| Publikation (Nr.) |
 copernicus.org/nhess-3-285-2003.pdf |
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| Zusammenfassung |
| Investigations of
the distribution of regional seismicity and the results of numerical
simulations of the seismic process show the increase of inhomogenity in
spatio-temporal distribution of the seismicity prior to large earthquakes
and formation of inhomogeneous clusters in a wide range of scales. Since
that, the multifractal approach is appropriate to investigate the details
of such dynamics. Here we analyze the dynamics of the seismicity
distribution before a number of strong earthquakes occurred in two
seismically active regions of the world: Japan and Southern California. In
order to study the evolution of spatial inhomogeneity of the seismicity
distribution, we consider variations of two multifractal characteristics:
information entropy of multifractal measure generation process and the
higher-order generalized fractal dimension of the continuum of the
earthquake epicenters. Also we studied the dynamics of the level of spatio-temporal
correlations in the seismicity distribution. It is found that two
aforementioned multifractal characteristics tend to decrease and the level
of spatio-temporal correlations tends to increase before the majority of
considered strong earthquakes. Such a tendency can be considered as an
earthquake precursory signature. Therefore, the results obtained show the
possibility to use multifractal and correlation characteristics of the
spatio-temporal distribution of regional seismicity for seismic hazard
risk evaluation. |
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