ANSTO Publications Online >
Conference Publications >
Conference Publications >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/8557

Title: When is a Tsunami a Mega-Tsunami?
Authors: Chague-Goff, C
Goff, JR
Terry, JP
Goto, K
Keywords: SEAS
TSUNAMIS
GEOLOGY
IMPACT STRENGTH
JAPAN
GEOGRAPHY
Issue Date: 12-Jan-2014
Publisher: American Geophysical Union, Fall Meeting 2014
Citation: ChaguĂ©-Goff, C., Goff, J., Terry, J. P., & Goto, K. (15-19 December, 2014 ). When is a tsunami a megatsunami. Paper presented at the AGU Fall meeting, San Francisco, America.
Abstract: The 2004 Indian Ocean Tsunami is commonly called a mega-tsunami, and this attribute has also been linked to the 2011 Tohoku-oki tsunami. However, since this term was first coined in the early 1990's there have been very few attempts to define it. As such it has been applied in a rather arbitrary fashion to a number of tsunami characteristics, such as wave height or amplitude at both the source and at distant locations, run-up height, geographical extent and impact. The first use of the term is related to a tsunami generated by a large bolide impact and indeed it seems entirely appropriate that the term should be used for such rare events on geological timescales. However, probably as a result of media-driven hyperbole, scientists have used this term at least twice in the last decade, which is hardly a significant portion of the geological timescale. It therefore seems reasonable to suggest that these recent unexpectedly large events do not fall in the category of mega-tsunami but into a category of exceptional events within historical experience and local perspective. The use of the term mega-tsunami over the past 14 years is discussed and a definition is provided that marks the relative uniqueness of these events and a new term, appropriately Japanese in origin, namely that of souteigai-tsunami, is proposed. Examples of these tsunamis will be provided.
URI: http://adsabs.harvard.edu/abs/2014AGUFMNH21A3827C
http://apo.ansto.gov.au/dspace/handle/10238/8557
ISSN: #NH21A-3827
Appears in Collections:Conference Publications

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback