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| Titel |
Geological evidence for paleotsunamis along eastern Sicily (Italy): an overview |
| VerfasserIn |
P. M. Martini, M. S. Barbano, D. Pantosti, A. Smedile, C. Pirrotta, P. Carlo, S. Pinzi |
| 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. 8 ; Nr. 12, no. 8 (2012-08-14), S.2569-2580 |
| Datensatznummer |
250011049
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| Publikation (Nr.) |
 copernicus.org/nhess-12-2569-2012.pdf |
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| Zusammenfassung |
We present geological evidence for paleotsunamis along the ~230 km-long
coast of eastern Sicily (Italy); combining this information
with historical data, we reconstruct a unique history of tsunami inundations.
We integrate data on 38 paleotsunami deposits (from fine sand layers to
boulders) collected at 11 sites (one offshore). The geological data record
traces of large tsunamis which have occurred during the past 4 millennia. Chronological
constrains include 14C, 210Pb and 137Cs, OSL and
tephrochronology. When compatible, the age of the paleotsunami deposits is
associated to historical events, but it is also used to highlight unknown
tsunamis. Average tsunami recurrence interval (between 320 and 840 yr) and
minimum inland tsunami ingressions (often greater than the historical ones)
were estimated at several sites. On the basis of this work, the tsunami
catalogue is implemented by two unknown tsunamis which occurred during the first
millennium BC and by one unknown regional tsunami, which occurred in 650–770 AD.
By including this latter event in the eastern Sicily catalogue, we estimate
an average recurrence interval for strong tsunamis of ca. 385 yr.
Comparison and merging of historical and geological data can definitely
contribute to a better understanding of regional and local tsunami potential
and provides robust parameters to be used in tsunami hazard estimates. |
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