Geophysical data acquisition - OGS

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The Marche Microzonation Project is a two-year research project, whose general objective is the detailed microzonation of some selected cities of the Marche Region. The <strong>OGS</strong> contribution develops within the second year of the project. The aim is to perform a detailed simulation of the ground motion and site response analysis for the cities of Treia (MC) and Cagli (PS). Numerical simulations are performed using the SPEM. The reference event is a M=5.7 earthquake, and it is associated to two normal faults located beneath the cities, respectively. The second Figure shows a wavefield snapshot for the simulations performed for Treia. Marche Microzonation Project. Wavefield snapshot (P-SV acceleration) of the SPEM simulation performed for the town of Treia (Macerata, Marche, Italy). The locations of the town and source are indicated at the top and by the couple of arrows, respectively. Within the project entitled Damage Scenarios in the Veneto-Friuli Area, the activity of the first year aims at building-up a ground shaking scenario at a regional scale for the area surrounding the town of Vittorio Veneto. The reference earthquake is the M=5.8 event, which occurred in “Cansiglio” on October 14, 1936. The associated fault mechanism is oblique, with a strong character of reverse fault. Both point source models and rupture propagation along an extended fault are considered. The dominant feature of the geological structure is the thrust corresponding to the Alpago-Cansiglio highlands, the southern edge of which features a very steep change of elevation. The reference earthquake is associated to this thrust. The particular location of the source, which is rather deep and right in the middle of a structural discontinuity, makes it possible to tackle this study with a non classical approach, that is differentiating the surface structure and top elevation in different zones, i.e., the plane area, the foot-hill zone, the alpine valleys, and the mountain area, respectively. The areas of maximum ground shaking predicted in this way agree very well with those observed in the macroseismic field (third Figure) even just by using a point source. 31
Collaborations: National Group for the Defence Against Earthquakes (GNDT) and National Group of Volcanology (GNV), belonging formerly to the National Council of Research (CNR) and currently to the National Institute of Geophysics and Volcanology (INGeV); Politecnico di Milano; Università della Basilicata (Potenza); Università di Catania; Università di Camerino; Università La Sapienza (Roma); Università di Napoli; Università di Udine; Università di Trieste; National Institute of Geophysics and Volcanology. A B Damage Scenarios in the Veneto-Friuli Area. The October 14, 1936 (M=5.8) “Cansiglio” earthquake. (A) Observed macroseismic field, and (B) peak ground accelerations predicted numerically by the WIM. 32
Page 2 and 3: Istituto Nazionale di Oceanografia
Page 4: Contents Introduction . . . . . . .
Page 7 and 8: Sea, close to the Antarctic Peninsu
Page 10 and 11: Measurements while drilling (data a
Page 12 and 13: Vallazza research well: 3D-RVSP sei
Page 14 and 15: Therefore, having beside a high ele
Page 16 and 17: • Standard 20’ container modifi
Page 18 and 19: • Offshore gravimetric survey “
Page 20 and 21: The GPR instruments. Integrated met
Page 22 and 23: Seismic data processing Coordinator
Page 24 and 25: allow for the different spatial sam
Page 26 and 27: Results of application of the stati
Page 28 and 29: Measurements while drilling (R & D)
Page 30 and 31: Wave modeling Coordinator: Géza SE
Page 32 and 33: Phase velocities of the five wave m
Page 34 and 35: (SPEM) and the Wavenumber Integrati
Page 38 and 39: Seismic inversion Coordinator: Aldo
Page 40 and 41: The joint inversion of direct, refl
Page 42 and 43: Transferring technology from the oi
Page 44 and 45: At the end of the year, we started
Page 46 and 47: ODP Leg 178 - Site Location Site 10
Page 48 and 49: Core 1165B-14H Composite diagram sh
Page 50 and 51: Cenozoic Evolution of the South Ork
Page 52 and 53: Magallanes-Fagnano master fault TWT
Page 54 and 55: (Top): Structural map of the BSRs o
Page 56 and 57: Physical properties of sediment cor
Page 58 and 59: Bathymetric map of the North Atlant
Page 60 and 61: Synthetic Aperture Radar (SAR) remo
Page 62 and 63: Publications Wave modeling ARNTSEN,
Page 64 and 65: Seismic inversion ROSSI, G., AND VE
Page 66 and 67: TINIVELLA, U. AND LODOLO, E., 2000.
Page 68 and 69: POLETTO, F., LOVO, M., AND CARCIONE
Page 70 and 71: REBESCO, M., CITA, M.B., HIEKE, W.,
Page 72 and 73: Visitors Peter F. BARKER, British A
Page 74 and 75: About Trieste, Italy Overwiew Tries
Page 76 and 77: Near Trieste One cannot miss a visi

Geophysical data acquisition - OGS

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