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| Titel |
The 2013 Sea of Okhotsk earthquake: evidence for tsunami generation by a deep earthquake |
| VerfasserIn |
Efim Pelinovsky, Emile Okal, Andrey Zaytsev |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087613
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| Publikation (Nr.) |
 EGU/EGU2014-1671.pdf |
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| Zusammenfassung |
| The Sea of Okhotsk earthquake of 24 May 2013 is the largest ever recorded
deep earthquake (h = 603 km; M sub w = 8.3).
Despite the generally accepted concept that such deep events do not
generate significant tsunamis, a long-period
signal with a tentative peak-to-peak amplitude of 3-4 mm is present on
the records of DART buoys 21402 and 21419, deployed seawards of the Kuril
Island arc. This interpretation is confirmed by numerical simulations,
using both a shallow-water approximation algorithm (based on surface
displacements calculated in the framework of Mansinha and Smylie [1971]
and/or Okada's [1985] formulae), and a normal mode summation, based on
the original work of Ward [1980].
Both approaches confirm tsunami amplitudes in the millimetric range
at the two DART sensors, and reaching 1-2 cm in the epicentral area.
More generally, the dependence of tsunami amplitude with focal depth
between 20 and 670 km is investigated theoretically
on the basis of numerical simulations. |
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