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Towards a seismogenic source model of the Dinarides
Author(s)
Type
Poster session
Language
English
Obiettivo Specifico
3.2. Tettonica attiva
Status
Published
Conference Name
Issued date
September 9, 2009
Conference Location
Rimini
Subjects
Abstract
Geology-based seismogenic source models are becoming the fundamental input for seismic hazard assessment
at the scale of an entire country. In this work, we will illustrate in simple steps the complex process that leads
from basic data to a fully-fledged seismogenic source model of the Dinaride thrust belt, running along coastal
Croatia, Montenegro and part of Albania.
We started from a layer of basic geological and structural data and explored a wide range of indicators of recent
tectonic activity, such as drainage anomalies/diversions and displaced or warped geological markers. We then
analyzed the interplay of these indicators with known or prospective tectonic structures. To the picture thus
obtained, we added a layer with a revised historical seismic catalog and selected a few earthquakes for which
we re-estimate epicenter and magnitude. At the end of our analyses we combined all these data in a structured
GIS database. With these data at hand, we also compared the longer-term indicators with present-day
stress/strain data such as GPS velocities and earthquake focal solutions.
Following the approach already developed for the construction of the Database of Individual Seismogenic
Sources for Italy, we developed a seismogenic source model for the Dinarides in which the better constrained
seismogenic faults have been mapped and parameterized and made ready for use in seismic hazard practice.
We believe that our experience in the Dinarides will become useful in unifying and formalizing the process of
constructing seismic source models in other countries.
at the scale of an entire country. In this work, we will illustrate in simple steps the complex process that leads
from basic data to a fully-fledged seismogenic source model of the Dinaride thrust belt, running along coastal
Croatia, Montenegro and part of Albania.
We started from a layer of basic geological and structural data and explored a wide range of indicators of recent
tectonic activity, such as drainage anomalies/diversions and displaced or warped geological markers. We then
analyzed the interplay of these indicators with known or prospective tectonic structures. To the picture thus
obtained, we added a layer with a revised historical seismic catalog and selected a few earthquakes for which
we re-estimate epicenter and magnitude. At the end of our analyses we combined all these data in a structured
GIS database. With these data at hand, we also compared the longer-term indicators with present-day
stress/strain data such as GPS velocities and earthquake focal solutions.
Following the approach already developed for the construction of the Database of Individual Seismogenic
Sources for Italy, we developed a seismogenic source model for the Dinarides in which the better constrained
seismogenic faults have been mapped and parameterized and made ready for use in seismic hazard practice.
We believe that our experience in the Dinarides will become useful in unifying and formalizing the process of
constructing seismic source models in other countries.
References
Basili R., G. Valensise, P. Vannoli, P. Burrato, U. Fracassi, S. Mariano, M.M. Tiberti, E. Boschi (2008), The Database of Individual Seismogenic Sources (DISS), version 3: summarizing 20 years of research on Italy's earthquake geology, Tectonophysics,doi:10.1016/j.tecto.2007.04.14.
Benac, Č., M. Juračić and T. Bakran-Petricioli, Submerged tidal notches in the Rijeka Bay NE Adriatic Sea: indicators of relative sea-level change and of recent tectonic movements, Marine Geology 212 (2004), pp. 21–33.
Benac, Č., M. Juračić and I. Blašković, Tidal notches in Vinodol Channel and Bakar Bay, NE Adriatic Sea: indicators of recent tectonics, Marine Geology 248 (2008), pp. 151–160.
Caporali, A., et al., Surface kinematics in the Alpine–Carpathian–Dinaric and Balkan region inferred from a new multi-network GPS combination solution, Tectonophysics(2009), doi:10.1016/j.tecto.2009.04.035.
DISS Working Group, 2009, Database of Individual Seismogenic Sources (DISS), Version 3.1: A Compilation of Potential Sources for Earthquakes Larger than M 5.5 in Italy and Surrounding Areas: http://diss.rm.ingv.it/diss/.
OneGeology - Making Geological Map Data for the Earth Accessible: http://www.onegeology.org/.
Heidbach, O., Tingay, M., Barth, A., Reinecker, J., Kurfeß, D. and Müller, B., The World Stress Map database release 2008 doi:10.1594/GFZ.WSM.Rel2008, 2008.
Pondrelli, S., Salimbeni, S., Ekstrom, G., Morelli, A., Gasperini, P., and Vannucci, G., 2006, The Italian CMT dataset from 1977 to the present: Physics of the Earth and Planetary Interiors, v. 159, p. 286–303, doi:10.1016/j.pepi.2006.07.008.
Benac, Č., M. Juračić and T. Bakran-Petricioli, Submerged tidal notches in the Rijeka Bay NE Adriatic Sea: indicators of relative sea-level change and of recent tectonic movements, Marine Geology 212 (2004), pp. 21–33.
Benac, Č., M. Juračić and I. Blašković, Tidal notches in Vinodol Channel and Bakar Bay, NE Adriatic Sea: indicators of recent tectonics, Marine Geology 248 (2008), pp. 151–160.
Caporali, A., et al., Surface kinematics in the Alpine–Carpathian–Dinaric and Balkan region inferred from a new multi-network GPS combination solution, Tectonophysics(2009), doi:10.1016/j.tecto.2009.04.035.
DISS Working Group, 2009, Database of Individual Seismogenic Sources (DISS), Version 3.1: A Compilation of Potential Sources for Earthquakes Larger than M 5.5 in Italy and Surrounding Areas: http://diss.rm.ingv.it/diss/.
OneGeology - Making Geological Map Data for the Earth Accessible: http://www.onegeology.org/.
Heidbach, O., Tingay, M., Barth, A., Reinecker, J., Kurfeß, D. and Müller, B., The World Stress Map database release 2008 doi:10.1594/GFZ.WSM.Rel2008, 2008.
Pondrelli, S., Salimbeni, S., Ekstrom, G., Morelli, A., Gasperini, P., and Vannucci, G., 2006, The Italian CMT dataset from 1977 to the present: Physics of the Earth and Planetary Interiors, v. 159, p. 286–303, doi:10.1016/j.pepi.2006.07.008.
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