Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10347
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dc.contributor.authorallBraun, T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallCaciagli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallPucci, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallBatllò, J.; CGC-Barcelona, Barcelona, Spainen
dc.contributor.authorallCesca, S.; GFZ-Potsdam, Potsdam, Germanyen
dc.contributor.editorallSRL; Seismological Society of Americaen
dc.date.accessioned2016-10-03T09:06:17Zen
dc.date.available2016-10-03T09:06:17Zen
dc.date.issued2015-04-21en
dc.identifier.urihttp://hdl.handle.net/2122/10347en
dc.description.abstractThe seismotectonics of the Upper Tiber Valley are dominated by the Altotiberina Fault (ATF), an NE-dipping low-angle normal fault system, and its antithetic W-dipping high-angle normal faults. A lthough the southern part of the ATF was demonstrated to creep, its capability to generate strong or moderate earthquakes is still under debate. On April 26, 1917 at 9:35:59 (GMT) a strong earthquake struck the northernmost portion of the Upper Tiber Valley (Tuscany) producing severe damages and about 20 fatalities. The Catalogue of Strong Italian Earthquakes reports this event as the so-c alled Monterchi earthquake, relating to 134 macroseismic observations, mainly distributed on the western side of the Tiber Valley. The maximum and epicentral intensity was determined as Io=IX- X (MCS), corresponding to an equivalent magnitude of Me=6, that defines this event as the most important of the area. A total of 49 historical seismograms from 19 different Euro-Mediterranean observatories are available in the database of the SISMOS Project - INGV. The BAAS bulletin of 1917 reports a list of 21 seismological observatories that record ed the P and S-phases for this earthquake. We included additional arrival-times deriving from further seismic bulletins - and from digitalizing original historical seismograms. We obtain a new, robust and consistent hypocentral solution, coherent with the macroseismic data, in particular by using S-P travel time differences for recordings where the absolute timing is uncertain. An accurate research on the technical characteristics of the recording historical seismometers (period, dampin g, gain etc.), allowed to deconvolve the original digitalized seismic traces (i) to determine the main seismic parameters (Mo, Mw, Circular Fault Radius), (ii) to constrain the possible source mechanism, by a combination of first motion analysis and modelling of synthetic seismograms, and (iii) to implement the solution in the framework of the regional tectonic setting.en
dc.language.isoEnglishen
dc.relation.ispartofSSA - Annual meeting 2015en
dc.subjectHistorical earthquakeen
dc.subjectSeismic analysisen
dc.titleWhatever Does a M5.8 Earthquake on the Low Angle Normal Altotiberina Fault (ITALY)?en
dc.typePoster sessionen
dc.description.statusPublisheden
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamicsen
dc.identifier.doi10.1785/0220150017en
dc.description.ConferenceLocationPasadena, California, USAen
dc.description.obiettivoSpecifico2T. Tettonica attivaen
dc.publisherSeismological Research Letteren
dc.description.fulltextopenen
dc.contributor.authorBraun, T.en
dc.contributor.authorCaciagli, M.en
dc.contributor.authorPucci, S.en
dc.contributor.authorBatllò, J.en
dc.contributor.authorCesca, S.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentCGC-Barcelona, Barcelona, Spainen
dc.contributor.departmentGFZ-Potsdam, Potsdam, Germanyen
dc.contributor.editordepartmentSeismological Society of Americaen
item.openairetypePoster session-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptUniversity of Lisbon, Portugal-
crisitem.author.deptGFZ - Potsdam, Germany-
crisitem.author.orcid0000-0003-1778-1328-
crisitem.author.orcid0000-0002-7248-4118-
crisitem.author.orcid0000-0002-3557-2936-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.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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