Local seismic response in Catania (Italy): A test area in the northern part of the town

2007 ◽  
Vol 94 (1-2) ◽  
pp. 38-49 ◽  
Author(s):  
G. Lombardo ◽  
R. Rigano
Keyword(s):  
Seismic Response ◽  
Test Area ◽  
Local Seismic Response ◽  
The Town

Are Synthetic Accelerograms Suitable for Local Seismic Response Analyses at Near-Field Sites?

2021 ◽  
Author(s):  
Francesca Mancini ◽  
Sebastiano D’Amico ◽  
Giovanna Vessia
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Near Field ◽  
Central Italy ◽  
Propagation Path ◽  
Soil Behavior ◽  
Seismic Stations ◽  
Seismic Input ◽  
Local Seismic Response ◽  
Finite Fault

ABSTRACT Local seismic response (LSR) studies are considerably conditioned by the seismic input features due to the nonlinear soil behavior under dynamic loading and the subsurface site conditions (e.g., mechanical properties of soils and rocks and geological setting). The selection of the most suitable seismic input is a key point in LSR. Unfortunately, few recordings data are available at seismic stations in near-field areas. Then, synthetic accelerograms can be helpful in LSR analysis in urbanized near-field territories. Synthetic accelerograms are generated by simulation procedures that consider adequately supported hypotheses about the source mechanism at the seismotectonic region and the wave propagation path toward the surface. Hereafter, mainshocks recorded accelerograms at near-field seismic stations during the 2016–2017 Central Italy seismic sequence have been compared with synthetic accelerograms calculated by an extended finite-fault ground-motion simulation algorithm code. The outcomes show that synthetic seismograms can reproduce the high-frequency content of seismic waves at near-field areas. Then, in urbanized near-field areas, synthetic accelerograms can be fruitfully used in microzonation studies.

scholarly journals Physical stratigraphy and geotechnical properties controlling the local seismic response in explosive volcanic settings: the Stracciacappa maar (central Italy)

2020 ◽  
Vol 80 (1) ◽  
pp. 179-199
Author(s):  
M. Moscatelli ◽  
G. Vignaroli ◽  
A. Pagliaroli ◽  
R. Razzano ◽  
A. Avalle ◽  
...  
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Central Italy ◽  
Volcanic Event ◽  
Ground Motion Amplification ◽  
Local Seismic Response ◽  
Single Station ◽  
Seismic Scenarios ◽  
Physical Stratigraphy ◽  
Subsoil Model

AbstractNowadays, policies addressed to prevention and mitigation of seismic risk need a consolidated methodology finalised to the assessment of local seismic response in explosive volcanic settings. The quantitative reconstruction of the subsoil model provides a key instrument to understand how the geometry and the internal architecture of outcropping and buried geological units have influence on the propagation of seismic waves. On this regard, we present a multidisciplinary approach in the test area of the Stracciacappa maar (Sabatini Volcanic District, central Italy), with the aim to reconstruct its physical stratigraphy and to discuss how subsoil heterogeneities control the 1D and 2D local seismic response in such a volcanic setting. We first introduce a new multidisciplinary dataset, including geological (fieldwork and log from a 45-m-thick continuous coring borehole), geophysical (electrical resistivity tomographies, single station noise measurements, and 2D passive seismic arrays), and geotechnical (simple shear tests performed on undisturbed samples) approaches. Then, we reconstruct the subsoil model for the Stracciacappa maar in terms of vertical setting and distribution of its mechanical lithotypes, which we investigate for 1D and 2D finite element site response analyses through the application of two different seismic scenarios: a volcanic event and a tectonic event. The numerical modelling documents a significant ground motion amplification (in the 1–1.5 Hz range) revealed for both seismic scenarios, with a maximum within the centre of the maar. The ground motion amplification is related to both 1D and 2D phenomena including lithological heterogeneity within the upper part of the maar section and interaction of direct S-waves with Rayleigh waves generated at edges of the most superficial lithotypes. Finally, we use these insights to associate the expected distribution of ground motion amplification with the physical stratigraphy of an explosive volcanic setting, with insights for seismic microzonation studies and local seismic response assessment in populated environments.

The Uncertainty in the Local Seismic Response Analysis

2008 ◽  
Author(s):  
A. Pasculli ◽  
A. Pugliese ◽  
R. W. Romeo ◽  
T. Sanò ◽  
Adolfo Santini ◽  
...  
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Local Seismic Response

scholarly journals Use of Synthetic Accelerograms in Local Seismic Response Analyses at Near Field Sites

2021 ◽  
Author(s):  
Francesca Mancini ◽  
Giovanna Vessia ◽  
Sebastiano D'Amico
Keyword(s):  
Seismic Response ◽  
Near Field ◽  
Local Seismic Response

Reconstruction of a Reference Subsoil Model for the Seismic Microzonation of Gori (Georgia): A Procedure Based on Principal Component Analysis (PCA)

2021 ◽  
Author(s):  
Silvia Giallini ◽  
Enrico Paolucci ◽  
Pietro Sirianni ◽  
Dario Albarello ◽  
Iolanda Gaudiosi ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Seismic Response ◽  
Principal Component ◽  
Component Analysis ◽  
Vibration Monitoring ◽  
Ambient Vibration ◽  
Geological Evidence ◽  
Local Seismic Response ◽  
Geophysical Surveys ◽  
Single Station

ABSTRACT This article focuses on the full exploitation of geological and economically viable geophysical surveys for the seismic characterization of the shallow subsoil in the frame of microzonation studies in urban areas where economic resources for detailed seismic response analyses are scarce. In these conditions, the outcomes of inexpensive geophysical surveys (e.g., based on ambient vibration monitoring or surface-wave prospecting) must be fully exploited. To reduce the uncertainties related to these kinds of procedures, their joint interpretation in the light of geological evidence is mandatory. To this purpose, we propose the application of principal component analysis to combine the results of distributed single-station ambient vibration measurements (horizontal-to-vertical spectral ratio [HVSR] technique) to provide a preliminary zonation of the study area. The zones identified in this way are then characterized by considering the available geognostic boreholes, VS profiles deduced by the joint inversion of HVSR curves, and available Rayleigh-wave dispersion curves deduced from active seismic prospecting (multichannel analysis of surface-waves technique). The final outcome allows the definition of a preliminary seismic model of the study area, which is also constrained by the available geological data deduced from on-purpose surveys. The proposed approach has been applied to the city of Gori (Georgia). The proposed approach allowed a reliable assessment of buried geometries, geological domains, and the distribution of lithofacies, which can control the local seismic response. In detail, the major role of paleovalley infills and interfluve domains has been enlightened by adding in evidence concerning the peculiar stratigraphic relationships and buried morphologies, which may determine 1D and 2D resonance effects.

Local Seismic Response in a Large Intra-mountain Basin as Observed from Earthquakes and Microtremor Recordings: The Avezzano Area (Central Italy)

2014 ◽  
pp. 1153-1157 ◽  
Author(s):  
Daniela Famiani ◽  
Paolo Boncio ◽  
Fabrizio Cara ◽  
Rocco Cogliano ◽  
Giuseppe Di Giulio ◽  
...  
Keyword(s):  
Seismic Response ◽  
Central Italy ◽  
Local Seismic Response

Vrancea Source Influence on Local Seismic Response in Bucharest

2001 ◽  
Vol 158 (12) ◽  
pp. 2407-2429 ◽  
Author(s):  
C. L. Moldoveanu ◽  
G. F. Panza
Keyword(s):  
Seismic Response ◽  
Local Seismic Response

scholarly journals 2-D Seismic Response Analysis of a Slope in the Tyrrhenian Area (Italy)

2021 ◽  
Vol 11 (7) ◽  
pp. 3180
Author(s):  
Antonio Cavallaro ◽  
Antonio Ferraro ◽  
Salvatore Grasso ◽  
Antonio Puccia
Keyword(s):  
Seismic Response ◽  
Response Spectra ◽  
Seismic Effect ◽  
Economic Damage ◽  
Response Analysis ◽  
Morphological Heterogeneity ◽  
Numerical Studies ◽  
Multichannel Analysis ◽  
Local Seismic Response ◽  
North Eastern

The Caronia area is located in the Tyrrhenian north-eastern sector of Sicily (Italy). Starting in 2010, attention focused on the study of landslides phenomena that occurred in this area, which caused significant economic damage to buildings and infrastructures and loss of productive activities. The site is characterized by geotechnical, geological and morphological heterogeneity, and for this reason the site is particularly prone to seismic topographic amplification effects. In this paper, the authors carried out numerical studies focused on the topographic seismic effect evaluation concerning the slope affected by the landslide phenomena. For this site, geotechnical characterization was available concerning both in-situ and laboratory tests; boreholes, piezometers, down-hole tests, multichannel analysis of surface waves tests, seismic tomographies and inclinometer measurements were carried out. Furthermore, 1-D and 2-D local seismic response analyses were carried out by using different synthetic seismograms related to the earthquake of Messina and Reggio Calabria on 28 December 1908. The results of the numerical analyses are presented in terms of response seismograms and response spectra at the surface.

scholarly journals Implementation of the ProHeritage project in 2018 and 2019

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Igor Kulenović ◽  
Neda Kulenović ◽  
Šime Vrkić
Keyword(s):  
Cultural Heritage ◽  
Cultural Landscape ◽  
Research Area ◽  
Test Area ◽  
Archaeological Heritage ◽  
The Town ◽  
Landscape Level

The paper presents information on the implementation of the project Cultural Landscape – a Model of Valorisation, Protection, Management and Use of Cultural Heritage - ProHeritage (UIP-2017-05-2152) in 2018 and 2019. The project is carried out in the area of the municipality of Jasenice and the town of Obrovac. It encompasses a segment of southern and southeastern Velebit and western part of Bukovica. The aim of the project is valorisation of cultural and archaeological heritage at the landscape level, in contrast to the model focused on monuments as a dominant approach in Croatia. Research area represents a test area for developing models of work for valorisation of landscape as a heritage resource.

Sign in / Sign up

Export Citation Format

Share Document