文章基本信息

标题：Update of the tsunami catalogue of New Caledonia using a decision table based on seismic data and marigraphic records
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作者：Roger, Jean ; Pelletier, Bernard ; Aucan, Jérôme 等
期刊名称：Natural Hazards and Earth System Sciences
电子版ISSN：2195-9269
出版年度：2019
卷号：19
期号：7
页码：1471-1483
DOI：10.5194/nhess-19-1471-2019
语种：English
出版社：Copernicus Publications
摘要：Fourteen years ago, the 26 December 2004 Indian Ocean tsunami demonstrated the destructional capability of tsunamis to the entire world.Since then, many research programs have been initiated to try to understandthe phenomenon and its related hazards better and to improve the early warningsystems for exposed coastal populations. Pacific Islands Countries andTerritories (PICTs) are especially vulnerable to tsunamis. Amongst them, New Caledonia is a French overseas territory located in the SouthwestPacific and exposed to several tsunami sources. In 2010, a catalogue oftsunamis that were visually observed or measured in New Caledonia waspublished. Since this first study, several events occurred between 2009 and 2019, and an update of this catalogue was necessary within the framework of a tsunami hazard assessment project in New Caledonia (TSUCAL). To complete this catalogue, a decision table has been designed to select potential tsunamigenic events within the USGS earthquake database, using criteria on the distance to New Caledonia, the magnitude and the hypocenter depth. Then a cross-comparison between these earthquakes, the NOAA National Geophysical Data Center (NGDC) tsunami catalogue and local tide gauge records provided 25 events that were recorded in New Caledonia for the period from 30 September 2009 to10 January 2019. These events are added to the 12 events reported with certainty during previous studies, leading to a number of 37 tsunamis triggered by earthquakes reported or recorded in New Caledonia since 1875. Six of them have been identified only thanks to local tide gauges, supporting the fact that instrumental recording of tsunamis is paramount for tsunami hazard studies, from early warning to the validation of coastal models. In addition, unpublished tide gauge data are provided for the 1960 Chile tsunami.