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| Titel |
The pecularities of shear crack pre-rupture evolution and distribution of seismicity before strong earthquakes |
| VerfasserIn |
D. Kiyashchenko, V. Troyan |
| 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 ; 1, no. 3 ; Nr. 1, no. 3, S.145-158 |
| Datensatznummer |
250000181
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| Publikation (Nr.) |
 copernicus.org/nhess-1-145-2001.pdf |
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| Zusammenfassung |
| Several
methods are presently suggested for investigating pre-earthquake evolution
of the regions of high tectonic activity based on analysis of the
seismicity spatial distribution. Some precursor signatures are detected
before strong earthquakes: decrease in fractal dimension of the continuum
of earthquake epicenters, cluster formation, concentration of seismic
events near one of the nodal planes of the future earthquake, and others.
In the present paper, it is shown that such peculiarities are typical of
the evolution of the shear crack network under external stresses in
elastic bodies with inhomogeneous distribution of strength. The results of
computer modeling of crack network evolution are presented. It is shown
that variations of the fractal dimension of the earthquake epicenters’
continuum and other precursor signatures contain information about the
evolution of the destruction process towards the main rupture. |
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