Regional-scale seafloor mapping and geohazard assessment. The experience from the Italian project MaGIC (Marine Geohazards along the Italian Coasts)

Chiocci, Francesco Latino; Ridente, Domenico

doi:10.1007/s11001-011-9120-6

Cited by 49 publications

(20 citation statements)

References 43 publications

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“…This research was funded by the National MaGIC Project (Marine Geohazards along the Italian Coasts, Chiocci & Ridente, 2011) and carried out in as part of the RITMARE (Ricerca ITaliana per il MARE) Project.…”

Section: Softwarementioning

confidence: 99%

Morphology of Lipari offshore (Southern Tyrrhenian Sea)

et al. 2014

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High-resolution multibeam bathymetry was recently collected around Lipari, the largest and most densely populated island of the Aeolian Archipelago (Southern Tyrrhenian Sea). The data were acquired within the context of marine geological studies performed in the area over the last 10 years. We present the first detailed morphological map of the Lipari offshore at 1:100,000 scale (Main Map). A rugged morphology characterizes the submarine portions of Lipari volcano, reflecting both volcanic and erosive-depositional processes. The volcanic features include cones, lava flows and bedrock outcrops. Erosive-depositional features include an insular shelf topped by submarine depositional terraces related to Late-Quaternary sea-level fluctuations, as well as landslide scars, channelized features, fanshaped deposits and wavy bedforms. The different distribution of volcanic and erosivedepositional features on the various sectors of Lipari is mainly related to the older age of the western flank with respect to the eastern one. The map also provides insights for a first marine geohazard assessment of this active volcanic area.

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Section: Softwarementioning

confidence: 99%

Morphology of Lipari offshore (Southern Tyrrhenian Sea)

et al. 2014

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“…Since earthquake and tsunami data were carefully scrutinized by the compilers of the two basic datasets of this study (i.e., the CPTI04 and the ITCver3), the latter hypothesis is to be preferred. Indeed invoking a submarine mass failure seems reasonable since it is known (1) that even small earthquakes can trigger landslides quite far from the source in areas prone to instability (Keefer, 2002;Delgado et al, 2011), (2) that such failures are quite hard or impossible to detect in the ocean without adequate means of high-resolution bathymetric surveying and, hence, it is not surprising that they remained unnoticed, (3) that recent programmes of extensive bathymetric investigations in the margins surrounding Italy have revealed a large number of submarine landslides previously unknown, which is suggestive of a strong susceptibility to fail for Italian margin slopes (Chiocci and Ridente, 2011). Whatever the cause of the tsunami, it is clear that DM is unable to capture these events, which will remain unalarmed.…”

Section: Nat Hazards Earthmentioning

confidence: 99%

Applicability of the Decision Matrix of North Eastern Atlantic, Mediterranean and connected seas Tsunami Warning System to the Italian tsunamis

Tinti

Graziani

Brizuela

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract.After the 2004 Indian Ocean tsunami catastrophe, UNESCO through the IOC (Intergovernmental Oceanographic Commission) sponsored the establishment of Intergovernmental Coordination Groups (ICG) with the aim to devise and implement Tsunami Warning Systems (TWSs) in all the oceans exposed to tsunamis, in addition to the one already in operation in the Pacific (PTWS). In this context, since 2005, efforts have begun for the establishment of TWSs in the Indian Ocean (IOTWS), in the Caribbean area (CARIBE EWS) and in the North Eastern Atlantic, the Mediterranean and Connected Seas (NEAMTWS).In this paper, we focus on a specific tool that was first introduced in the PTWS routine operations, i.e., the Decision Matrix (DM). This is an easy-to-use table establishing a link between the main parameters of an earthquake and the possible ensuing tsunami in order to make quick decision on the type of alert bulletins that a Tsunami Warning Center launches to its recipients. In the process of implementation of a regional TWS for the NEAM area, two distinct DMs were recently proposed by the ICG/NEAMTWS, one for the Atlantic and the other for the entire Mediterranean area.This work applies the Mediterranean NEAMTWS DM to the earthquakes recorded in Italy and compares the action predicted by the DM vs. the action that should be appropriate in view of the observed tsunami characteristics with the aim to establish how good the performance of the Italian TWS will be when it uses the DM for future events. To this purpose, we make use of the parametric catalogue of the Italian earthquakes (CPTI04) compiled in 2004 and the most recent compilation of the Italian tsunami, based on the Italian Tsunami Catalogue of 2004 and the subsequent revisions. In order to better compare the TWS actions, we have identified four different kinds of action coding them from 0 to 3 according to the tsunami severity and have further considered three different distance ranges where these actions apply, that is local, regional and basin-wide, that refer to the distance of the message recipients from the tsunami source. The result of our analysis is that the actions prescribed by the DM are adequate only in 45 %-55 % of the cases, overestimations are about 37 % and underestimations are the rest. As a whole, the predictive ability of the DM is not satisfactory, which implies that recipients have the difficult task in managing bulletins carrying a great deal of uncertainty and on the other hand also suggests that strategies to improve the DM or to go beyond the DM need to be found.

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“…High‐resolution 2‐D reflection seismic (Figure a) and multibeam echosounder data were acquired during R/V Meteor Cruise M86/2 off Southern Italy from 27 December 2011 to 17 January 2012. Additional high‐resolution bathymetric data, collected in the frame of the MaGIC project (Marine Geohazards along the Italian Coasts [ Chiocci and Ridente , ]), were assessed for this study as well.…”

Section: Data Sets and Methodsmentioning

confidence: 99%

Tsunamigenic potential of a newly discovered active fault zone in the outer Messina Strait, Southern Italy

Heidarzadeh

Cukur

et al. 2017

Geophysical Research Letters

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The 1908 Messina tsunami was the most catastrophic tsunami hitting the coastline of Southern Italy in the younger past. The source of this tsunami, however, is still heavily debated, and both rupture along a fault and a slope failure have been postulated as potential origin of the tsunami. Here we report a newly discovered active Fiumefreddo‐Melito di Porto Salvo Fault Zone (F‐MPS_FZ), which is located in the outer Messina Strait in a proposed landslide source area of the 1908 Messina tsunami. Tsunami modeling showed that this fault zone would produce devastating tsunamis by assuming slip amounts of ≥5 m. An assumed slip of up to 17 m could even generate a tsunami comparable to the 1908 Messina tsunami, but we do not consider the F‐MPS_FZ as a source for the 1908 Messina tsunami because its E‐W strike contradicts seismological observations of the 1908 Messina earthquake. Future researches on the F‐MPS_FZ, however, may contribute to the tsunami risk assessment in the Messina Strait.

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Regional-scale seafloor mapping and geohazard assessment. The experience from the Italian project MaGIC (Marine Geohazards along the Italian Coasts)

Cited by 49 publications

References 43 publications

Morphology of Lipari offshore (Southern Tyrrhenian Sea)

Morphology of Lipari offshore (Southern Tyrrhenian Sea)

Applicability of the Decision Matrix of North Eastern Atlantic, Mediterranean and connected seas Tsunami Warning System to the Italian tsunamis

Tsunamigenic potential of a newly discovered active fault zone in the outer Messina Strait, Southern Italy

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