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| Titel |
Tsunami wave generation by the eruption of underwater volcano |
| VerfasserIn |
Y. Egorov |
| 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 ; 7, no. 1 ; Nr. 7, no. 1 (2007-01-19), S.65-69 |
| Datensatznummer |
250004328
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| Publikation (Nr.) |
 copernicus.org/nhess-7-65-2007.pdf |
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| Zusammenfassung |
| Eruption of volcanoes represents one of important origins of tsunami
waves and is responsible for most catastrophic tsunami (Krakatau, 1883;
Thira, BC). The products of volcano eruption include solids,
liquids (lava) and gases. The present article presents hydrodynamic
model of relatively slow process of eruption, with domination of
liquids. The process of underwater eruption of lava causes the
disturbance of ocean free surface. The standard formulation of
hydrodynamic problem for incompressible fluid in cylindrically
symmetric layer of with rigid bottom and free surface with local
hydrodynamic source (volcano) is used. This problem is solved by
constructing Green function using methodology of Sretenskij. The
solution is obtained in the form of an integral and depends on the
dynamics of eruption. Real data show that some volcanoes can erupt several
millions of tons of lava during several dozens of seconds (Bezimjannij,
Kamchatka). The
long waves are more efficiently generated by larger T: these tsunamis can
have smaller initial perturbations of free surface, but the waves are long
and can transmit their energy over longer distances. |
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