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Italian strong motion records in ITACA: overview and record processing
Author(s)
Language
English
Obiettivo Specifico
5.2. TTC - Banche dati di sismologia strumentale
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
6/9 (2011)
Publisher
Springer Science
Pages (printed)
1741-1759
Issued date
December 2011
Keywords
Abstract
The published version 1.0 of the new Italian strong-motion database ITACA (Italian
ACcelerometric Archive, http://itaca.mi.ingv.it) includes to date (December 2010) about 4000
three-component waveforms up to M 6.9, from more than 1800 earthquakes up to 6.9,
recorded by about 400 stations in the period 1972 – 2009. The uncorrected and corrected
strong motion data are archived and can be retrieved with their metadata, concerning events,
stations and waveforms. The aim of this paper is to present the procedures for processing the
records included in ITACA, accounting for the heterogeneity of this data set, both in terms of
quality and amplitude of records as well as illustrating the main features of the ITACA strongmotion
dataset. Later, we focus on the “exceptional” ground-motion records, that we,
conventionally, denote as those having peak acceleration and peak velocity larger than 300
cm/s2 and 15 cm/s, respectively. These records are less than 2% of the whole ITACA dataset
but they are the most relevant for the seismic hazard and engineering implications. Such large
peak values, recorded at distances up to 30km, are related not only to the strongest Italian
earthquakes, but also to events with magnitude down to 4. Furthermore, we investigate the
dependence of the largest peak values on horizontal and vertical directions and on source-to-site
distance.
ACcelerometric Archive, http://itaca.mi.ingv.it) includes to date (December 2010) about 4000
three-component waveforms up to M 6.9, from more than 1800 earthquakes up to 6.9,
recorded by about 400 stations in the period 1972 – 2009. The uncorrected and corrected
strong motion data are archived and can be retrieved with their metadata, concerning events,
stations and waveforms. The aim of this paper is to present the procedures for processing the
records included in ITACA, accounting for the heterogeneity of this data set, both in terms of
quality and amplitude of records as well as illustrating the main features of the ITACA strongmotion
dataset. Later, we focus on the “exceptional” ground-motion records, that we,
conventionally, denote as those having peak acceleration and peak velocity larger than 300
cm/s2 and 15 cm/s, respectively. These records are less than 2% of the whole ITACA dataset
but they are the most relevant for the seismic hazard and engineering implications. Such large
peak values, recorded at distances up to 30km, are related not only to the strongest Italian
earthquakes, but also to events with magnitude down to 4. Furthermore, we investigate the
dependence of the largest peak values on horizontal and vertical directions and on source-to-site
distance.
Type
article
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Pacor_Itaca_dataset_corrected.pdf
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