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A reappraisal of the seismicity of Sardinia, Italy

Carlo Meletti, Romano Camassi and Viviana Castelli
A reappraisal of the seismicity of Sardinia, Italy
Seismological Research Letters (December 2020) Pre-Issue Publication

Abstract

In popular opinion, Sardinia is the only nonseismic region of Italy. Most researchers are likely to agree, up to a point. Geology-wise, the Sardinia-Corsica block is among the stablest areas of the Mediterranean. History-wise, up to 2011, only one M (sub w) 5.1 event located offshore Sardinia was listed by Italian seismic catalogs (13 November 1948). Seismic networks record only a few, low energy (M (sub w) <5) events, mostly located offshore and with little or no effects on land. Seismic hazard in Sardinia is very low. "Low," yes, but not "totally lacking." We present the results of a recent reappraisal of Sardinian seismicity. We gathered information on three major earthquakes (1616, 1771, and the 1948-1949 sequence). Another sequence (January-March 1901) was re-evaluated, identifying its previously unknown main event. It was confirmed that some earthquakes (1870, 1906, 1922, and 1924) had low magnitudes and scarce to nil macroseismic effects, whereas some other turned out either very doubtful or wholly fictitious (1835, 1838, 1855, and 1898). The seismic hazard of Sardinia can now be reassessed on a sounder basis than before. We hope that our work will help the people of Sardinia to improve their awareness of living in a seismic land, if with a low level of seismicity.


ISSN: 0895-0695
EISSN: 1938-2057
Serial Title: Seismological Research Letters
Serial Volume: Pre-Issue Publication
Title: A reappraisal of the seismicity of Sardinia, Italy
Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy
Published: 20201216
Text Language: English
Publisher: Seismological Society of America, El Cerrito, CA, United States
References: 52
Accession Number: 2021-008340
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N38°49'60" - N41°30'00", E08°15'00" - E09°45'00"
Secondary Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute.
Update Code: 2021
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