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| Titel |
Historical and paleo-tsunami deposits on Kamchatka, Russia: long-term chronologies and long-distance correlations |
| VerfasserIn |
T. K. Pinegina, J. Bourgeois |
| 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. 4 ; Nr. 1, no. 4, S.177-185 |
| Datensatznummer |
250000222
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| Publikation (Nr.) |
 copernicus.org/nhess-1-177-2001.pdf |
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| Zusammenfassung |
| Along the
eastern coast of Kamchatka, at a number of localities, we have identified
and attempted to assign ages to deposits of both historic and prehistoric
(paleo-) tsunamis. These deposits are dated and correlated using
tephrochronology from Holocene marker tephra and local volcanic ash
layers. Because the historical record of earthquakes and tsunamis on
Kamchatka is so short, these investigations can make important
contributions to evaluating tsunami hazards. Moreover, because even the
historical record is spotty, our work helps add to and evaluate tsunami
catalogues for Kamchatka. Furthermore, tsunami deposits provide a proxy
record for large earthquakes and thus are important paleoseismological
tools. The combined, preserved record of tsunami deposits and of numerous
marker tephra on Kamchatka offers an unprecedented opportunity to study
tsunami frequency. Using combined stratigraphic sections, we can examine
both the average frequency of events for each locality, and also changes
in frequency through time. Moreover, using key marker tephra as time
lines, we can compare tsunami frequency and intensity records along the
Kamchatka subduction zone. Preliminary results suggest real variations in
frequency on a millennial time scale, with the period from about 0 to 1000
A.D. being particularly active at some localities. |
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