Offshore evidence of large-scale lateral collapses on the eastern flank of Stromboli, Italy, due to structurally-controlled, bilateral flank instability

Romagnoli, Claudia; Casalbore, Daniele; Chiocci, Francesco Latino; Bosman, Alessandro

doi:10.1016/j.margeo.2009.02.004

Cited by 65 publications

(40 citation statements)

References 50 publications

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“…Prior studies have identified multiple giant submarine landslide deposits surrounding volcanic islands associCorrespondence to: C. Montanaro (cristianmontanaro@libero.it) ated with hot spot volcanism, such as the Hawaiian Islands (Moore et al, 1989(Moore et al, , 1994, Azores Islands (Holcomb and Searle, 1991), Canary Islands (Watts et al, 1995;Masson et al, 2002), Cape Verde Islands (Le Bas et al, 2007;Masson et al, 2008) and Society Islands (Clouard et al, 2001). Similar deposits have been found around volcanic islands and island arcs above subduction zones, including volcanoes in the Lesser Antilles Arc (Boudon et al, 2007), Japanese Arc (Satake and Kato, 2001), Tonga-Kermadec Arc (Wright et al, 2006), Bismark Island (Silver et al, 2009), Aeolian Island (Tibaldi, 2001;Romagnoli et al, 2009) and the Aleutian Island Arc (Coombs et al, 2007b).…”

Section: Introductionsupporting

confidence: 55%

Volcano collapse along the Aleutian Ridge (western Aleutian Arc)

Montanaro

Begét

2011

Nat. Hazards Earth Syst. Sci.

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Abstract. The Aleutian Ridge, in the western part of the Aleutian Arc, consists of a chain of volcanic islands perched atop the crest of a submarine ridge with most of the active Quaternary stratocones or caldera-like volcanoes being located on the northern margins of the Aleutian Islands. Integrated analysis of marine and terrestrial data resulted in the identification and characterization of 17 extensive submarine debris avalanche deposits from 11 volcanoes. Two morphological types of deposits are recognizable, elongate and lobate, with primary controls on the size and distribution of the volcanic debris being the volume and nature of material involved, proportion of fine grained material, depth of emplacement and the paleo-bathymetry. Volume calculations show the amount of material deposited in debris avalanches is as much as three times larger than the amount of material initially involved in the collapse, suggesting the incorporation of large amounts of submarine material during transport. The orientation of the collapse events is influenced by regional fault systems underling the volcanoes. The western Aleutian Arc has a significant tsunamigenic potential and communities within the Aleutian Islands and surrounding areas of the North Pacific as well as shipping and fishing fleets that cross the North Pacific may be at risk during future eruptions in this area.

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Section: Introductionsupporting

confidence: 55%

Volcano collapse along the Aleutian Ridge (western Aleutian Arc)

Montanaro

Begét

2011

Nat. Hazards Earth Syst. Sci.

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“…Four large-scale failures affected the northwestern flank of the volcano during the last 13 ka [40], thus contributing to the formation of a 12 km 3 debris fan offshore [41]. A similar debris avalancheturbidite system was evidenced on the eastern flanks of Stromboli [42]. It is worth noting that other Italian volcanoes such as Etna, Vesuvius and Ischia were the source of submarine debris avalanches that were likely tsunamigenic [43][44][45].…”

Section: Volcanic Earthquakesmentioning

confidence: 73%

Source mechanisms of volcanic tsunamis

Paris

2015

Phil. Trans. R. Soc. A.

111

104

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Volcanic tsunamis are generated by a variety of mechanisms, including volcano-tectonic earthquakes, slope instabilities, pyroclastic flows, underwater explosions, shock waves and caldera collapse. In this review, we focus on the lessons that can be learnt from past events and address the influence of parameters such as volume flux of mass flows, explosion energy or duration of caldera collapse on tsunami generation. The diversity of waves in terms of amplitude, period, form, dispersion, etc. poses difficulties for integration and harmonization of sources to be used for numerical models and probabilistic tsunami hazard maps. In many cases, monitoring and warning of volcanic tsunamis remain challenging (further technical and scientific developments being necessary) and must be coupled with policies of population preparedness.

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“…Conversely, while dismantling and large-scale mass-wasting processes are widely detected on the submarine flanks of other active volcanic islands (e.g. Boudon, Le Friant, Komorowski, Deplus, & Semet, 2007;Coombs, White, & Scholl, 2007;Mitchell, Masson, Watts, Gee, & Urgeles, 2002;Moore, Normark, & Holcomb, 1994;Oehler, Lénat, & Labazuy, 2007;Romagnoli, Casalbore, Chiocci, & Bosman, 2009a;Romagnoli, Kokelaar, Casalbore, & Chiocci, 2009b), these features are subordinate in the offshore areas. They are mainly represented by small and medium-scale slope failures affecting the outer edge of the insular shelf, similar to that observed on nearby Faial Island (Quartau et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Bathy-morphological setting of Terceira Island (Azores) after the FAIVI cruise

et al. 2013

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High-resolution morpho-bathymetric data at 1:200,000 scale obtained during the FAIVI cruise (2011) and the resulting geomorphologic map of the Terceira island offshore area (central Azores, Portugal) are presented for the first time. The uneven morphology around Terceira is primarily related to volcanic features, such as linear and cone-shaped eruptive centres and lava flows. Such features are mostly concentrated on volcanic ridges and are aligned along preferential axes, suggesting a strong interaction between tectonics and volcanic processes. The occurrence of active tectonics is also demonstrated by systems of faults cutting the seafloor to the north, east and south of the island. Mapped erosive-depositional features include an insular shelf located at , 150 m water depth (wd), small landslide headwalls, erosive scarps, channelized features and crescent-shaped bedforms. The presented map may represent the base for a first-order geo-hazard assessment.

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Offshore evidence of large-scale lateral collapses on the eastern flank of Stromboli, Italy, due to structurally-controlled, bilateral flank instability

Cited by 65 publications

References 50 publications

Volcano collapse along the Aleutian Ridge (western Aleutian Arc)

Volcano collapse along the Aleutian Ridge (western Aleutian Arc)

Source mechanisms of volcanic tsunamis

Bathy-morphological setting of Terceira Island (Azores) after the FAIVI cruise

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