Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3381
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dc.contributor.authorallScognamiglio, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallTinti, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallMichelini, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallMalagnini, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallDreger, D.; Seismological Berkeley Laboratoryen
dc.date.accessioned2007-12-14T15:54:58Zen
dc.date.available2007-12-14T15:54:58Zen
dc.date.issued2006-12-10en
dc.identifier.urihttp://hdl.handle.net/2122/3381en
dc.description.abstractSince 2002, the Istituto Nazionale di Geofisica e Vulcanologia (INGV) in Rome has started the installation of a high quality regional broadband network throughout the Italian territory. Up today, the network consists of 125 stations equipped with 40 s natural period instruments. The dense station coverage allows for the implementation of real-time regional moment tensor (MT) estimation procedures such as that proposed by Dreger and Helmberger (1993). The automatic MT algorithm uses real-time broadband waveforms continuously telemetered to INGV, and it is triggered for events with magnitude greater than Ml 3.5. This is the lowermost value for which we have found it possible to obtain reliable MT determination in the frequency band used in the inversion. The automatic solution is available within about 3-5 minutes after the earthquake location. Each solution has an assigned quality factor dependent on the number of the station used in the inversion, and the godness of fit between synthetic and observed data. MT is published on the web after revision by a seismologist. Efforts are also made to evaluate MT solutions for earthquakes occurring in Italy and neighboring regions in the last years. The results are compared to those obtained from application of other moment tensor methods. It is always found a good agreement between the newly determined solutions and those from other methods. Overall, fast and accurate moment tensor solutions are an important ingredient when attempting to estimate the recorded ground shaking. Overall, in Italy, earthquakes in the magnitude range 3.5 – 5 are very common; the availability of their focal mechanisms allows the mapping of the principal stress field axes leading to a better understanding of the ongoing tectonics.en
dc.language.isoEnglishen
dc.relation.ispartofAGU fall meetingen
dc.subjectreal time moment tensoren
dc.subjectbroadband stationsen
dc.subjectfocal mechanismsen
dc.titleNear real time regional moment tensor estimation using italian broadband stationsen
dc.typePoster sessionen
dc.description.statusSubmitteden
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneousen
dc.description.ConferenceLocationMoscone West, 800 Howard Street Moscone South, Howard Street (between 3rd and 4th streets) San Francisco, CA, USAen
dc.relation.referencesDreger, D. S., and D. V. Helmberger (1993). Determination of source parameters at regional distances with single station or sparse network data, J. of Geophys. Res. 98, 8107-8125. Saikia, C. K. (1994). Modified frequency-wavenumber algorithm for regional seismograms using Filon’s quadrature; modeling of Lg waves in eastern North America, Geophys. J. Int. 118, 142-158. Dreger. D. S. (2003). Time-Domain Moment Tensor INVerse Codel (TDMT-INVC) Release 1.1. International Handbook of Earthquake and Engineering Seismology, W. H.. K. Lee, H. Kanamori, P. C. Jennings, and C. Kisslinger (Editors), Vol B, 1627 pp. Chiarabba C., L. Jovane, R. Di Stefano (2005). A new view of Italian seismicity using 20 years of instrumental recordings, Tectonophysics 395, 251-268. Pondrelli, S., S. Salimbeni, G. Ekström, A. Morelli, P. Gasperini and G. Vannucci (2006). The Italian CMT dataset from 1977 to the present, Phys. Earth Planet. Int., doi:10.1016/j.pepi.2006.07.008,159/3-4, pp. 286-303.en
dc.description.obiettivoSpecifico1.1. TTC - Monitoraggio sismico del territorio nazionaleen
dc.description.fulltextopenen
dc.contributor.authorScognamiglio, L.en
dc.contributor.authorTinti, E.en
dc.contributor.authorMichelini, A.en
dc.contributor.authorMalagnini, L.en
dc.contributor.authorDreger, D.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, 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, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentSeismological Berkeley Laboratoryen
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 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 Roma1, Roma, Italia-
crisitem.author.deptUniversity of California, Berkeley, CA, United States-
crisitem.author.orcid0000-0002-5437-5276-
crisitem.author.orcid0000-0002-6942-3592-
crisitem.author.orcid0000-0001-6716-8551-
crisitem.author.orcid0000-0001-5809-9945-
crisitem.author.orcid0000-0002-6590-3089-
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-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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