气候变化领域集成服务门户(CCPortal): Combining 3D seismics; eyewitness accounts and numerical simulations to reconstruct the 1888 Ritter Island sector collapse and tsunami

CCPortal

DOI	10.1007/s00531-020-01854-4
	Combining 3D seismics; eyewitness accounts and numerical simulations to reconstruct the 1888 Ritter Island sector collapse and tsunami
	Karstens J.; Kelfoun K.; Watt S.F.L.; Berndt C.
发表日期	2020
ISSN	14373254
起始页码	2659
结束页码	2677
卷号	109 期号:8
英文摘要	The 1888 Ritter Island volcanic sector collapse triggered a regionally damaging tsunami. Historic eyewitness accounts allow the reconstruction of the arrival time, phase and height of the tsunami wave at multiple locations around the coast of New Guinea and New Britain. 3D seismic interpretations and sedimentological analyses indicate that the catastrophic collapse of Ritter Island was preceded by a phase of deep-seated gradual spreading within the volcanic edifice and accompanied by a submarine explosive eruption, as the volcanic conduit was cut beneath sea level. However, the potential impact of the deep-seated deformation and the explosive eruption on tsunami genesis is unclear. For the first time, it is possible to parameterise the different components of the Ritter Island collapse with 3D seismic data, and thereby test their relative contributions to the tsunami. The modelled tsunami arrival times and heights are in good agreement with the historic eyewitness accounts. Our simulations reveal that the tsunami was primarily controlled by the displacement of the water column by the collapsing cone at the subaerial-submarine boundary and that the submerged fraction of the slide mass and its mobility had only a minor effect on tsunami genesis. This indicates that the total slide volume, when incorporating the deep-seated deforming mass, is not directly scalable for the resulting tsunami height. Furthermore, the simulations show that the tsunamigenic impact of the explosive eruption energy during the Ritter Island collapse was only minor. However, this relationship may be different for other volcanogenic tsunami events with smaller slide volumes or larger magnitude eruptions, and should not be neglected in tsunami simulations and hazard assessment. © 2020, The Author(s).
英文关键词	Ritter Island; Tsunami simulations; Volcanic sector collapse; Volcanogenic tsunami genesis
语种	英语
scopus关键词	collapse; computer simulation; data interpretation; numerical model; sedimentology; seismicity; three-dimensional modeling; tsunami; volcanism; Bismarck Archipelago; New Britain; New Guinea; Papua New Guinea
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147611
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Laboratoire Magmas et Volcans, Université Blaise Pascal Clermont-Ferrand II, Clermont-Ferrand, France; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
推荐引用方式 GB/T 7714	Karstens J.,Kelfoun K.,Watt S.F.L.,et al. Combining 3D seismics; eyewitness accounts and numerical simulations to reconstruct the 1888 Ritter Island sector collapse and tsunami[J],2020,109(8).
APA	Karstens J.,Kelfoun K.,Watt S.F.L.,&Berndt C..(2020).Combining 3D seismics; eyewitness accounts and numerical simulations to reconstruct the 1888 Ritter Island sector collapse and tsunami.International Journal of Earth Sciences,109(8).
MLA	Karstens J.,et al."Combining 3D seismics; eyewitness accounts and numerical simulations to reconstruct the 1888 Ritter Island sector collapse and tsunami".International Journal of Earth Sciences 109.8(2020).