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Seismotectonic characteristics of the Italian Central Alps and implications for the seismic hazard

G. B. Carulli and D. Slejko
Seismotectonic characteristics of the Italian Central Alps and implications for the seismic hazard (in Seismic risk in eastern Lombardy--Rischio sismico nella Lombardia orientale, Alberto Clerici (editor), Anna Feriani (editor) and Alessandro Maria Michetti (editor))
Bollettino della Societa Geologica Italiana (February 2009) 128 (1): 201-215

Abstract

This study investigates the seismotectonic characteristics of the central Alps, and mainly the Lombard sector. The analysis of the historical and recent instrumental seismicity can identify the areas where earthquakes with magnitude around 5 occurred: the Chur and Verona areas, the region around Lake Garda, and the Lombard Po plain, slightly south of the foothills. Minor seismicity interests Engadin, northern Valtellina, Mustair, and the Venosta valleys. Most of the earthquakes show a dip-slip focal mechanism, generally related to reverse faults, but a few strike-slip motions were observed as well. Six vertical cross-sections have been constructed by collecting information about the surficial geology, deep crustal structures, and seismicity. A direct link between the hypocentral distribution and the tectonic structures is sometimes difficult, but the analysis has given some seismotectonic suggestions. Three main seismotectonic domains remain identified: the Lombard Po plain, the Garda area, and the Alps s.s. Among these domains, the Garda area shows the highest seismicity and the earthquakes are associated to the Giudicarie system and its possible interference with the Schio-Vicenza system. The general pattern of the seismogenesis is the key to defining the seismogenic zones to be used for seismic hazard assessment at regional and national scales.


ISSN: 0037-8763
Coden: BOGIAT
Serial Title: Bollettino della Societa Geologica Italiana
Serial Volume: 128
Serial Issue: 1
Title: Seismotectonic characteristics of the Italian Central Alps and implications for the seismic hazard
Title: Seismic risk in eastern Lombardy--Rischio sismico nella Lombardia orientale
Author(s): Carulli, G. B.Slejko, D.
Author(s): Clerici, Albertoeditor
Author(s): Feriani, Annaeditor
Author(s): Michetti, Alessandro Mariaeditor
Affiliation: Universita di Trieste, Dipartimento di Scienze Geologiche, Ambientali e Marine, Italy
Affiliation: DICATA, Brescia, Italy
Pages: 201-215
Published: 200902
Text Language: English
Summary Language: Italian
Publisher: Societa Geologica Italiana, Rome, Italy
Meeting name: Seismic risk in eastern Lombardy workshop
Meeting location: Brescia, ITA, Italy
Meeting date: 20061205Dec. 5, 2006
References: 85
Accession Number: 2009-084731
Categories: Environmental geologySeismology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch maps
N45°40'00" - N46°40'00", E10°30'00" - E11°25'00"
Secondary Affiliation: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, ITA, Italy
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200946
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