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| Titel |
Volcano collapse along the Aleutian Ridge (western Aleutian Arc) |
| VerfasserIn |
C. Montanaro, J. Beget |
| 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 ; 11, no. 3 ; Nr. 11, no. 3 (2011-03-08), S.715-730 |
| Datensatznummer |
250009253
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| Publikation (Nr.) |
 copernicus.org/nhess-11-715-2011.pdf |
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| Zusammenfassung |
| The Aleutian Ridge, in the western part of the Aleutian
Arc, consists of a chain of volcanic islands perched atop the crest of a
submarine ridge with most of the active Quaternary stratocones or
caldera-like volcanoes being located on the northern margins of the Aleutian
Islands. Integrated analysis of marine and terrestrial data resulted in the
identification and characterization of 17 extensive submarine debris
avalanche deposits from 11 volcanoes. Two morphological types of deposits
are recognizable, elongate and lobate, with primary controls on the size and
distribution of the volcanic debris being the volume and nature of material
involved, proportion of fine grained material, depth of emplacement and the
paleo-bathymetry. Volume calculations show the amount of material deposited
in debris avalanches is as much as three times larger than the amount of
material initially involved in the collapse, suggesting the incorporation of
large amounts of submarine material during transport. The orientation of the
collapse events is influenced by regional fault systems underling the
volcanoes. The western Aleutian Arc has a significant tsunamigenic potential
and communities within the Aleutian Islands and surrounding areas of the
North Pacific as well as shipping and fishing fleets that cross the North
Pacific may be at risk during future eruptions in this area. |
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