From land to sea: multi-scale and multi-resolution analysis of active deformation and seismogenic sources around the coasts of Southern Italy

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During the last decade, we have blended our individual skills to form a research group devoted to investigating activecrustal deformation in areas adjacent to the coast of Southern Italy, with the aim to bridge the gap between the onshoreand offshore realms. Our research is based on a multi-scale and multi-resolution approach that includes high-resolutionseismics, coastal morpho-tectonics and structural geology, complemented by seismicity, Global Positioning System andInSAR. Need and opportunities of such an endeavor arise from the basic observation that, although most populationcenters lie close to the coastal areas, very little is known about active structures at the sea. However, hints of activedeformation occurring offshore are offered by physical correlation with known or proposed onland seismogenic sources,macroseismic fields of historic events, tsunamis. The capability of our group stems from the long-term experience formost types of marine geological and geophysical surveys, and for structural-stratigraphic analysis of tectonically activeareas. We regard the land-sea correlation issue as a key missing link that has hampered, so far, a sound interpretation ofactive structures in the submerged realm. Starting from this basis, we focused our attention on key sectors of the Southernpeninsular Italy and Sicily where active tectonics has been inferred offshore, but detailed information on deformationstructures is missing. The core dataset involves very high-resolution, single-channel (SCS) and multi-channel (MCS) dataacquired with a series of seismic sources, including multi-tips Sparker array, to provide detailed images of the most recent(e.g. Middle-Late Pleistocene) activity of targeted structures. These data were supplemented by ultra high-res (CHIRP)seismics, and multibeam bathymetric data to get a snapshot of the current deformation close or at the sea-floor, as wellas public (VIDEPI project) and unpublished MCS profiles. In addition to data acquired onboard oceanographic researchvessels, we complement the dataset by using a Sparker System mounted onboard a trailer-transportable boat suitable toacquire for nearshore surveys. Using additional datasets (seismicity, structural analysis, InSar, GPS etc.), the ultimategoal is a parameterization of active structures (e. g. Ferranti et al., 2014, Barreca et al., 2014), and the calculation ofaccurate rates of vertical movements (e.g. Pepe et al., 2014), on the basis of case-histories from Calabria and Sicily.
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2016


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