Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2522
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dc.contributor.authorallMassa, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italiaen
dc.contributor.authorallEva, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallSpallarossa, D.; 3Dipartimento per lo Studio del Territorio e delle sue Risorse, Universit`a di Genova,en
dc.contributor.authorallEva, C.; 3Dipartimento per lo Studio del Territorio e delle sue Risorse, Universit`a di Genova,en
dc.date.accessioned2007-09-20T11:37:58Zen
dc.date.available2007-09-20T11:37:58Zen
dc.date.issued2006en
dc.identifier.urihttp://hdl.handle.net/2122/2522en
dc.description.abstractIn August 2000 and July 2001 two seismic sequences, characterized by mainshocks with Ml (local magnitude) respectively 5.1 and 4.8, occurred in the Monferrato region (Italy). The regional seismic network of North-western Italy (RSNI) recorded more than 250 foreshocks and aftershocks. The routine locations, obtained from the Hypoellipse code, show a seismic activity concentrated in a circular area, of a radius of about 15 km, located near Acqui Terme, and randomly distributed in depth. Location errors, due to an uneven azimuthal station distribution of the regional seismic network, prevent recognition of the geometry of the active zone. Waveform analysis revealed the presence of several multiplets. In order to discriminate and successively relocate them, an automatic cross-correlation procedure was applied. Normalized cross-correlation matrixes, for the RSNI stations which recorded almost 90% of considered events, on the basis of a signal to noise ratio analysis, were computed using only S wave time windows. The use of a relocation procedure, based on the double-difference method which incorporates ordinary absolute travel-time measurements and/or cross-correlation differential travel-times, allowed us to overcome the constraints of the uneven distribution of stations giving a quite different frame of seismicity. The improved locations showed that the seismic activity is mainly arranged along a NE-SW oriented volume, at a depth range of 8–20 km, involving the basement crystalline units. This orientation is confirmed by the analysis of the focal mechanisms: most focal solutions show a strike slip component with one of the nodal planes consistent with the main orientation of the seismic events.en
dc.language.isoEnglishen
dc.publisher.nameSpringeren
dc.relation.ispartofJ. Seismol.en
dc.relation.ispartofseries/ 10 (2006)en
dc.subjectearthquake clustersen
dc.subjectwaveformen
dc.titleDetection of earthquake clusters on the basis of waveform similarity: an application in the Monferrato region (Piedmont, Italy)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1-22en
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysisen
dc.identifier.doi10.1007/s10950-006-2840-4en
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dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorMassa, E.en
dc.contributor.authorEva, E.en
dc.contributor.authorSpallarossa, D.en
dc.contributor.authorEva, C.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Milano, Milano, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.department3Dipartimento per lo Studio del Territorio e delle sue Risorse, Universit`a di Genova,en
dc.contributor.department3Dipartimento per lo Studio del Territorio e delle sue Risorse, Universit`a di Genova,en
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Milano, Milano, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.deptDipTeRis Università di Genova-
crisitem.author.deptDipTeRis Dipartimento per lo studio del territorio e delle sue risorse, Università di Genova-
crisitem.author.orcid0000-0003-0696-2035-
crisitem.author.orcid0000-0001-6054-1325-
crisitem.author.orcid0000-0002-8021-3908-
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-
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