Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/12343
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dc.date.accessioned2019-02-28T12:23:05Zen
dc.date.available2019-02-28T12:23:05Zen
dc.date.issued2019-02-27en
dc.identifier.urihttp://hdl.handle.net/2122/12343en
dc.description.abstractOn 26 April 1917, an earthquake Mw 6.0 (known as the Monterchi earthquake) struck the upper Tiber basin, central Italy. This Quaternary basin is situated on the hanging wall of a segmented low‐angle normal fault (LANF) named the Alto Tiberina fault (ATF), whose capability to act with stick‐slip behavior is debated. We reanalyzed instrumental historical data and performed a relocation of the hypocenter along with a reassessment of the scalar moment and magnitudes (⁠Mw and Ms⁠); we calculate the fault radius and stress drop and propose a focal solution based on first‐arrival polarities. The methodologies that we applied strongly take into account the intrinsic uncertainties present in the historical data to obtain solutions that provide well‐defined error estimates. The hypocentral solution is consistent with the known macroseismic scenario and is plausible in terms of root mean square (rms) and error ellipse. The calculated focal depth at ≈8  km⁠, even considering the depth uncertainty of ±4  km⁠, locates the earthquake source inside the ATF footwall. The Mw distribution (median Mw 5.8) suggests an overestimate of the macroseismic Mw probably due to seismic amplification caused by site effects. A preferred focal solution (strike 60/dip 84/ rake −162) defines an antiapenninic‐oriented fault, with predominantly right‐lateral slip. Our results strongly suggest that the 1917 Monterchi earthquake did not nucleate on one of the splays of the low‐angle ATF but rather was generated by a deeper seismic source, which could be referred to as a structural transfer zone responsible for the Quaternary LANF segmentation.en
dc.language.isoEnglishen
dc.relation.ispartofSeismological Research Lettersen
dc.relation.ispartofseries3/90 (2019)en
dc.subjecthistorical earthquakeen
dc.subjectseismic analysisen
dc.subjecthistorical seismogramsen
dc.titleDid the Deadly 1917 Monterchi Earthquake Occur on the Low‐Angle Alto Tiberina (Central Italy) Normal Fault?en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1131-1144en
dc.identifier.doi10.1785/0220180155en
dc.description.obiettivoSpecifico3T. Sorgente sismicaen
dc.description.journalTypeJCR Journalen
dc.contributor.authorCaciagli, Marcoen
dc.contributor.authorPucci, Stefanoen
dc.contributor.authorBatlló, Josepen
dc.contributor.authorCesca, Simoneen
dc.contributor.authorBraun, Thomasen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentInstitut Cartográfic i Geológic de Catalunyaen
dc.contributor.departmentGFZ German Research Centre for Geosciences Potsdamen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
item.openairetypearticle-
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 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.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0002-7248-4118-
crisitem.author.orcid0000-0002-3557-2936-
crisitem.author.orcid0000-0003-1778-1328-
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.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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