Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10711
DC FieldValueLanguage
dc.date.accessioned2018-02-16T07:47:25Zen
dc.date.available2018-02-16T07:47:25Zen
dc.date.issued2016-07-18en
dc.identifier.urihttp://hdl.handle.net/2122/10711en
dc.description.abstractWe analysed a catalogue of Italian earthquakes, covering 55 yr of data from 1960 to 2014 with magnitudes homogeneously converted to Mw, to compute the time-dependent relative frequencies with which strong seismic shocks (4.0 ≤Mw < 5.0), widely felt by the population, have been followed by main shocks (Mw ≥ 5.0) that threatened the health and the properties of the persons living in the epicentral area. Assuming the stationarity of the seismic release properties, such frequencies are estimates of the probabilities of potentially destructive shocks after the occurrence of future strong shocks. We compared them with the time-independent relative frequencies of random occurrence in terms of the frequency gain that is the ratio between the time-dependent and time-independent relative frequencies. The time-dependent relative frequencies vary from less than 1 per cent to about 20 per cent, depending on the magnitudes of the shocks and the time windows considered (ranging from minutes to years). They remain almost constant for a few hours after the strong shock and then decrease with time logarithmically. Strong earthquakes (with Mw ≥ 6.0) mainly occurred within two or three months of the strong shock. The frequency gains vary from about 10 000 for very short time intervals to less than 10 for a time interval of 2 yr. Only about 1/3 of main shocks were preceded by at least a strong shock in the previous day and about 1/2 in the previous month.en
dc.language.isoEnglishen
dc.relation.ispartofGeophysical Journal Internationalen
dc.relation.ispartofseries/207 (2016)en
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectEarthquake interactionen
dc.subjectForecasting and predictionen
dc.subjectStatistical seismologyen
dc.titleRelative frequencies of seismic main shocks after strong shocks in Italyen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber150–159en
dc.identifier.doi10.1093/gji/ggw263en
dc.description.obiettivoSpecifico5T. Modelli di pericolosità sismica e da maremotoen
dc.description.journalTypeJCR Journalen
dc.contributor.authorGasperini, Paoloen
dc.contributor.authorLolli, Barbaraen
dc.contributor.authorVannucci, Gianfrancoen
dc.contributor.departmentDipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversità di Bologna-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.orcid0000-0002-5314-0563-
crisitem.author.orcid0000-0003-4186-9055-
crisitem.author.orcid0000-0003-0918-0784-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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