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Undersea landslides: Extent and significance in the Pacific Ocean, an update

Natural Hazards and Earth System Science

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DOI: 10.5194/nhess-5-877-2005

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Abstract

Submarine landslides are known to occur disproportionately in a limited number of environments including fjords, deltas, canyons, volcanic islands and the open continental slope. An evaluation of the progress that has been made in understanding Pacific Ocean submarine landslides over the last 15 years shows that mapping technologies have improved greatly, allowing a better interpretation of landslide features. Some features previously identified as landslides are being reinterpreted by some as sediment waves. Previously underappreciated environments for landslides such as deep-sea trenches are being recognized and lava deltas are being found to be landslide prone. Landslides are also being recognized much more commonly as a potential source of tsunamis. Landslides that have produced tsunamis in the past are being mapped and in some cases modeled. The flow characteristics of turbidity currents produced by landslides in canyon heads have recently been monitored and the source of these failures has been identified using repeated multibeam mapping. Finally, some landslide deposits are being dated as part of assessing risk to coastal cities from landslide-tsunamis. European Geosciences Union ?? 2005 Author(s). This work is licensed under a Creative Commons License.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Undersea landslides: Extent and significance in the Pacific Ocean, an update
Series title:
Natural Hazards and Earth System Science
DOI:
10.5194/nhess-5-877-2005
Volume
5
Issue:
6
Year Published:
2005
Language:
English
Publisher:
European Geosciences Union
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Natural Hazards and Earth System Science
First page:
877
Last page:
892
Number of Pages:
16