Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11928
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dc.date.accessioned2018-09-10T07:27:54Zen
dc.date.available2018-09-10T07:27:54Zen
dc.date.issued2014-12-15en
dc.identifier.urihttp://hdl.handle.net/2122/11928en
dc.description.abstractThe Alto Tiberina Fault (ATF) is a 60 km long east-dipping low-angle normal fault, located in a sector of the Northern Apennines (Italy) undergoing active extension since the Quaternary (Chiaraluce et al. 2007). The ATF has been imaged by analyzing the active source seismic reflection profiles, and the instrumentally recorded persistent background seismicity. The present study is an attempt to separate the contributions of source, site, and crustal attenuation, in order to focus on the mechanics of the ATF, as well as the syn- and antithetic structrure related on the ATF hanging-wall (i.e. Gubbio fault and Umbria Valley fault). In order to compute source spectra, we perform a set of regression over the seismograms of ~ 400 small earthquakes (0.5 < ML < 3.0) recorded between 2010 and 2014 at 50 permanent seismic stations deployed in the framework of the Alto Tiberina Near Fault Observatory project (TABOO; Chiaraluce et al., 2014), three of which located in shallow boreholes. Because we deal with some very small earthquakes, we maximize the signal to noise ratio (SNR) with a technique based on the analysis of peak values of bandpass-filtered time histories, in addition to the same processing performed on Fourier amplitudes. We rely on Random Vibration Theory (RVT, Cartwright and Longuet-Higgins, 1956) to completely switch from peak values in the time domain to Fourier spectral amplitudes. So far, highly accurate, stable source spectra have been used to compute moment magnitudes (Mw) of all the events in the present data set, whereas in future developments the same data will be used to gain insights into the underlying mechanics of faulting and the earthquake processes.en
dc.language.isoEnglishen
dc.relation.ispartofAGU Fall Meeting 2014en
dc.subjectsmall earthquakesen
dc.titleSource characteristic of 2000 small earthquakes nucleating on the Alto Tiberina fault system (Central Italy)en
dc.typePoster sessionen
dc.description.statusUnpublisheden
dc.description.ConferenceLocationSan Franciscoen
dc.description.obiettivoSpecifico2T. Sorgente Sismicaen
dc.contributor.authorMunafò, Ireneen
dc.contributor.authorMalagnini, Lucaen
dc.contributor.authorTinti, Elisaen
dc.contributor.authorChiaraluce, Lauroen
dc.contributor.authorDi Stefano, Raffaeleen
dc.contributor.authorValoroso, Luisaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
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 Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.orcid0000-0002-9167-1883-
crisitem.author.orcid0000-0001-5809-9945-
crisitem.author.orcid0000-0002-6942-3592-
crisitem.author.orcid0000-0002-9697-6504-
crisitem.author.orcid0000-0003-3489-7453-
crisitem.author.orcid0000-0001-5014-0958-
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.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-
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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