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TitreThe 2004 Sumatra Earthquake and Tsunami: Lessons Learned in Subduction Zone Science and Emergency Management for the Cascadia Subduction Zone
AuteurCassidy, J F
SourcePure and Applied Geophysics vol. 172, issue 3-4, 2015 p. 835-847, https://doi.org/10.1007/s00024-014-1023-4
Année2015
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140339
ÉditeurSpringer
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1007/s00024-014-1023-4
Mediapapier; en ligne; numérique
Formatspdf
ProvinceColombie-Britannique; Région extracotière de l'ouest
SNRC103
Lat/Long OENS-133.0000 -118.0000 55.0000 39.0000
Lat/Long OENS 90.0000 101.0000 14.0000 -1.0000
Sujetssecousses séismiques; études séismiques; mécanismes de tremblement de terre; dégât causés par les tremblements de terre; tsunami; affaissement; subduction; zones de subduction; géophysique; tectonique
Illustrationslocation maps
ProgrammeOuest du Canada, risque géoscience, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
The 26 December 2004, Mw 9.3 Sumatra earthquake and tsunami was a pivotal turning point in our awareness of the dangers posed by subduction zone earthquakes and tsunamis. This earthquake was the world's largest in 40 years, and it produced the world's deadliest tsunami. This earthquake ruptured a subduction zone that has many similarities to the Cascadia Subduction Zone. In this article, I summarize lessons learned from this tragedy, and make comparisons with potential rupture characteristics, slip distribution, deformation patterns, and aftershock patterns for Cascadia using theoretical modeling and interseismic observations. Both subduction zones are approximately 1,100-1,300 km in length. Both have similar convergence rates and represent oblique subduction. Slip along the subduction fault during the 26 December earthquake is estimated at 15-25 m, similar to values estimated for Cascadia. The width of the rupture, *80-150 km estimated from modeling seismic and geodetic data, is similar to the width of the ''locked and transition zone'' estimated for Cascadia. Coseismic subsidence of up to 2 m along the Sumatra coast is also similar to that predicted for parts of northern Cascadia, based on paleoseismic evidence. In addition to scientific lessons learned, the 2004 tsunami provided many critical lessons for emergency management and preparedness. As a result of that tragedy, a number of preparedness initiatives are now underway to promote awareness of earthquake and tsunami hazards along the west coast of North America, and plans are underway to develop prototype tsunami and earthquake warning systems along Cascadia. Lessons learned from the great Sumatra earthquake and tsunami tragedy, both through scientific studies and through public education initiatives, will help to reduce losses during future earthquakes in Cascadia and other subduction zones of the world.
Résumé(Résumé en langage clair et simple, non publié)
Le tremblement de terre de Sumatra magnitude 9.3 de 2004 était le plus grand tremblement de terre de subduction le dans le monde dans plus de 40 années et a généré un tsunami dévastateur. Cet article, pour une rétrospective spéciale Volume 10 ans, résume les leçons tirées de cet événement, et des applications pour atténuer les risques dans la zone de subduction de Cascadia l'Amérique du Nord. Les sujets abordés comprennent la force et de l'étendue des secousses, tremblement de terre de déclenchement, les modèles de répliques, affaissement côtier et des leçons à tirer pour la gestion des urgences.
GEOSCAN ID295617