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| Titel |
Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (MW= 7.1): implications for the earthquake hazard mitigation |
| VerfasserIn |
M. Utkucu, H. Durmuş, H. Yalçın, E. Budakoğlu, E. Işık |
| 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 ; 13, no. 7 ; Nr. 13, no. 7 (2013-07-31), S.1889-1902 |
| Datensatznummer |
250018561
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1889-2013.pdf |
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| Zusammenfassung |
| Coulomb stress changes before and after the 23 October 2011
Van, eastern Turkey, earthquake have been analysed using available data related to the
background and the aftershock seismicity and the source faults. The
coseismic stress changes of the background seismicity had slightly promoted
stress over the rupture plane of the 2011 Van earthquake, while it yielded a
stress shadow over the Gürpı nar Fault which has been argued to have
produced
the 7 April 1646 Van earthquake. The stress shadow over the Gürp\i nar
fault has become more pronounced following the occurrence of the 2011 Van
earthquake, meaning that the repetition of the 1646 Van earthquake has been
further suppressed. Spatial distribution and source mechanisms of the 2011
Van earthquake's aftershocks have been utilised to define four clusters
with regard to their relative location to the mainshock rupture. In addition, the
aftershock sequence covers a much broader area toward the northeast.
Correlations between the observed spatial patterns of the aftershocks and
the coseismic Coulomb stress changes caused by the mainshock are determined
by calculating the stress changes over both optimally oriented and
specified fault planes. It is shown here that there is an apparent
correlation between the mainshock stress changes and the observed spatial
pattern of the aftershock occurrence, demonstrating the usefulness of the
stress maps in constraining the likely locations of the upcoming aftershocks
and mitigating earthquake hazard. |
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