Abstract
A hybrid statistical-deterministic approach has been applied to estimate strong ground motion parameters (PGA, spectral ordinates) in South-Eastern Sicily for a M = 7 earthquake. A number of 100 different rupture processes have been simulated along a composite fault system representing two segments of the Ibleo-Maltese fault scarp. Map at regional scale of mean PGA in the 0.5–20 Hz frequency band shows highest values (0.4–0.5 g) nearby and North of Catania, due to a dominant directivity effect. The COV parameter, which expresses the variability of PGA values as a function of source complexity, is higher in the region nearby and South of the town of Augusta, where, depending on the rupture history, rather large PGA values can be observed (>0.4 g). PGA attenuation curves suggest that an azimuthal variation could be related to the source extent and directivity. The response and pseudo acceleration spectra are computed for different sites in the town of Catania including an approximate 1D site response. Ground motion amplification effects at high frequency (5–20 Hz) are produced by thin shallow layer of soft clay, loose pyroclastites and fill. We observe small amplification effects, in the frequency ranges 2–3 Hz and 5–10 Hz, in sites where recent alluvia reach a thickness of some tens of meters. Otherwise, sites located on outcrops of massive lavas show moderate attenuation.
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References
Aki, K. and Richards, P.G., 1980, Quantitative seismology, theory and methods, Vols. 1 and 2, W.H. Freeman and Co., San Francisco, USA.
Amato, A., Azzaro, R., Basili, A., Chiarabba, C., Cocco, M., Di Bona, M. and Selvaggi, G., 1995, Main shock and aftershocks of the December 13, 1990, eastern Sicily earthquake, Annali di Geofisica 38, 255–266.
Azzaro, R. and Barbano, M.S., 1996, Is it possible to hypothesize active faults in South-Eastern Sicily? In Extended abstracts of Workshop ‘Toward the definition of the characteristics of expected earthquakes’, October 10-11, 1996, Milan, Italy, pp. 56–58 (in Italian).
Barbano, M.S., 1985, The Val di Noto earthquake of January 11, 1693. In: Postpischl (ed.), Atlas of Isoseismal Map of Italian Earthquakes, PFG-CNR, pp. 48–49.
Beck, J.L. and Dowling, M.J., 1988, Quick algorithms for computing either displacement, velocity or acceleration of an oscillator, Earth. Engng. Struct. Dyn. 16, 245–253.
Bernard, P. and Zollo, A., 1989, The Irpinia (Italy) 1980 earthquake: detailed analysis of a complex normal faulting, J. Geophys. Res. 94, 1631–1647.
Boatwright, J. and Boore, D.M., 1982, Analysis of the ground acceleration radiated by the 1980 Livermore Valley earthquakes for directivity and dynamic source characteristics, Bull. Seism. Soc. Am. 72, 1843–1865.
Boore, D.M., Joyner, W.B. and Fumal, T.E., 1997, Empirical near-source attenuation relationships for horizontal and vertical components of peak ground acceleration, peak ground velocity and pseudo-absolute acceleration response spectra, Seism. Res. Lett. 68, 154–179.
Casero, P., Cita, M.B., Croce, M. and DeMicheli, A., 1984, Attempt of evolutive interpretation ofMalta scarp based on geological and geophysical data, Mem. Soc. Geol. It. 27, 233–353 (in Italian).
Cocco, M. and Pacor, F., 1993, Space-time evolution of the rupture process from the inversion of strong-motion waveforms, Annali di Geofisica 36, 109–130.
E.N.E.L., 1998, Accelerometric records analysis of the Umbria-Marche seismic sequence (September-October, 1997), Report in 3 Volumes and CD-Rom prepared by E.N.E.L. and S.S.N., Rome, Italy (in Italian).
Eurocode 8, 1993, Earthquake resistant design of structure. Part 1–1, General rules and rules for buildings - Seismic actions and general requirements for structures, CEN/TC250/SC8/N83/ENVI998–I-1.
Faccioli, E. (coordinator), 1997, Geotechnical earthquake engineering characterization of the Catania municipal area, Technical Report and CD-Rom prepared by Ingegneria Geotecnica for CNR - Gruppo Nazionale Difesa Terremoti, Milan, Italy (in Italian).
Faccioli, E., 1999, Foreword, this issue.
Farra, V., Bernard, P. and Madariaga, R., 1986, Fast near source evaluation of strong ground motion for complex source models, Earth. Source Mech., Geoph. Monograph, A.G.U. 37, 121–130.
Finetti, I., 1982 Structure, stratigraphy and evolution of central Mediterranean, Boll. Geof. Teor. Appl. 24, 247–312.
Hanks, T.C. and Kanamori, H. 1979, A moment-magnitude scale, J. Geophys. Res. 84, 2348–2352.
Haskell, N.I., 1962, Crustal reflection of plane SH waves, J. Geophys. Res. 65, 4751–4767.
Herrero, A. and Bernard, P., 1994, A kinematic self-similar rupture process for earthquakes, Bull. Seism. Soc. Am. 84, 1216–1229.
Hirn, A., Nicolich, R., Gallart, J., Laigle, M. and Cernobori, L., 1997, Roots of Etna volcano in faults of great earthquakes, Earth Planet. Sc. Lett. 148(1–2), 171–191.
Joyner, W.B., 1991, Directivity from nonuniform ruptures, Bull. Seism. Soc. Am. 81, 1391–1395.
Kostrov, B.V. and Das, S., 1988, Principles of earthquake source mechanics, Appl. Math. Mech. Ser. Cambridge University Press, New York.
Koyama, J. and Izutani, Y., 1990, Seismic excitation and directivity of short-period body waves from a stochastic fault model, Tectonophysics 175, 67–79.
Madariaga, R., 1976, Dynamic of expanding circular fault, Bull. Seism. Soc. Am. 65, 163–182.
Olsen, K., Madariaga, R. and Archuleta, R., 1997, Threedimensional dynamic simulation of the 1992 Landers earthquake, Science 278, 834–838.
Piatanesi, A. and Tinti, S., 1998, A revision of the 1693 eastern Sicily earthquake and tsunami, J. Geophys. Res. 103, 2749–2758.
Sabetta, F. and Pugliese, A., 1987, Attenuation of peak horizontal acceleration and velocity from italian strong-motion records, Bull. Seism. Soc. Am. 77, 1491–1513.
Sirovich, L. and Pettenati, F., 1998, Seismotectonic outline of South-Eastern Sicily: an evaluation of available options for the scenario earthquake fault rupture, this issue.
Sommerville, P.G., Smith, N.F., Graves, R.W. and Abrahamson, N.A., 1997, Modification of empirical strong ground motion attenuation relations to include the amplitude and the duration effects of rupture directivity, Seism. Res. Lett. 68, 199–222.
Zollo, A., Bobbio, A., Emolo, A., Herrero, A. and De Natale, G., 1997, Modelling of ground acceleration in the near source range: the case of 1976 Friuli earthquake (M = 6.5), Northern Italy, J. Seismology 1, 305–319.
Zollo, A., Marcucci, S., Milana, G., Bongiovanni, G., Capuano, P., Emolo, A. and Herrero, A., 1998, The 1997 Colfiorito earthquake sequence (Central Italy): insights on the mainshock ruptures from near source strong motion records, poster presented at the XXIII General Assembly of European Geophysical Society, April 20-24, 1998, Nice, France.
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Zollo, A., Emolo, A., Herrero, A. et al. High frequency strong ground motion modelling in the Catania area associated with the Ibleo-Maltese fault system. Journal of Seismology 3, 279–288 (1999). https://doi.org/10.1023/A:1009857730064
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DOI: https://doi.org/10.1023/A:1009857730064