Search results for "SEISMIC"

First Evidence of Contourite Drifts in the North-Western Sicilian Active Continental Margin (Southern Tyrrhenian Sea)

2021

We present the results of an integrated geomorphological and seismo-stratigraphic study based on high resolution marine data acquired in the north-western Sicilian continental margin. We document for the first time five contourite drifts (marked as EM1a, EM2b, EM2, EM3a, and EM3b), located in the continental slope at depths between ca. 400 and 1500 m. EM1a,b have been interpreted as elongated mounded drifts. EM1a,b are ca. 3 km long, 1.3 km wide, and have a maximum thickness of 36 m in their center that thins northwards, while EM1b is smaller with a thickness up to 24 m. They are internally characterized by mounded seismic packages dominated by continuous and parallel reflectors. EM2 is loc…

Shallow structures at the outer Calabrian accretionary wedge (NW Ionian Sea): new insights from recently migrated reflection data

2010

A CRUSTAL SEISMIC PROFILE ACROSS SICILY: preliminary results

2009

Risk perception and social vulnerability to earthquakes in Beirut (Lebanon)

2011

SEISMIC NOISE ANALYSIS OF BROADBAND STATIONS OF THE ITALIAN SEISMIC NETWORK, USING POWER SPECTRAL DENSITY

2022

New insights into the stratigraphic-structural setting of the outermost Calabrian accretionary wedge (NW Ionian Sea ) based on recently-migrated refl…

2010

External Calabrian Arc (hereinafter ECA) is a SE-verging accretionary wedge developed above the convergent plate boundary between Africa and European plates, related to the subduction of the Ionian plate beneath the Calabrian plate: sediments have been scraped off the subducting Ionian plate and piled up along thrust faults opposite of the European region. Although regional geophysical studies conducted in the past 20 years suggest constraints on the internal structure of the ECA (e.g. CATALANO & SULLI, 2006), few, if any, of these studies discussed in detail its thin frontal portion, i.e. the transition of the ECA with the Ionian abyssal plain. We believe that this is the reason why a majo…

Seismotectonics in the North-Western Sicily Continental Margin: implications for Geohazard assessment

2017

Active processes in the Northern Sicily Continental Margin (NSCM) have been analysed to produce a seismotectonic map, in order to obtain a useful tool for the assessment of the seismic hazard of the sea-land region. The seismotectonic map is composed of overlapping layers that represent the distribution of different features, such as lithostratigraphy, tectonic elements, seismicity, heat flow, gravimetry, magnetometry, Moho depth, horizontal and vertical movements, submarine landslides, fluid emissions, outlining the mutual relationship and the active structures. The NSCM is suitable to test this approach because it’s located in a transitional area between the Sicilian-Maghrebian chain to t…

SEISMOTECTONIC MAP OF THE NORTHERN SICILY CONTINENTAL MARGIN (NSCM) AND IMPLICATIONS FOR GEOHAZARD ASSESSMENT

2018

The Sicily dominates the central Mediterranean Sea. The Northern Sicily Continental Margin (NSCM) is a segment of the Appeninic-Tyrrhenian System whose upbuilding refers to both the postcollisional convergence between Africa and a very complex “European” crust (Bonardi et al., 2001) or AlKaPeKa (sensu Boullin, 1986) and the opening of the Tyrrhenian back-arc basin. Seismostratigraphic and structural analysis of a large number of available (from ViDePi project) and unpublished (from Department of Earth and Marine Science of the University of Palermo) multichannel seismic reflection profiles acquired across the NSCM, allow us to produce an accurate seismotectonic map, in order to obtain a use…

The SI.RI.PRO. Project: field stratigraphical-structural data from the N-S central Sicily transect

2010

Detecting clusters in spatially correlated waveforms

2017

Seismic networks often record signals characterized by similar shapes that provide important information according to their geographic positions. We propose an approach to identify homogeneous clusters of seismic waves, combining analysis of waveforms with metadata and spectrogram information. In waveforms clustering, cross-correlation measures between signals may presents some limitations, so we refer to more recent contributes relating data-depth based clustering analysis. The mechanism for alignment is also an important topic of the analysis: warping (or aligning) procedures identify nuisance effects in phase variation, that, if ignored, may result in a possible loss of information and t…