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Gasparini, Calvino
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Gasparini, Calvino
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- PublicationOpen AccessThe uncertainty and ambiguity of isoseismal mapsThe problem of defining objective maps is as yet unresolved. The aim of the work, here presented, is to show how the studies of different authors and eras can produce contrasting, even contradictory, interpretations of the macroseismic data set for the same earthquake
57 55 - PublicationOpen AccessNorthern Sicily, September 6, 2002earthquake: investigation on peculiarmacroseismic effects(2003)
; ; ; ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Tosi, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;De Rubeis, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; The Northern Sicily, September 6, 2002 earthquake (Ml = 5.6, MW = 5.9) is investigated under macroseismic aspect: peculiar effects are collected besides standard effects normally used to define Mercalli-Cancani-Sieberg (MCS) intensity. They include sound heard during the quake, fear felt and a simple qualitative description of ground movement felt. Spatial coverage of such information is dense enough to be statistically processed, to give an interpolated, smoothed field for each data type. Sound heard is compared with theoretical sound field produced considering source geometry and transmission of waves to air, it also confirms the Southern Sicily amplification disclosed by macroseismic intensity values. Fear felt is also in agreement with macroseismic intensity field while type of ground motion is a partly independent aspect.191 416 - PublicationRestrictedApplication of Kriging Technique to Seismic Intensity Data(2005)
; ; ; ; ;De Rubeis, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Tosi, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Solipaca, A.; Istituto Nazionale di Statistica; ; ; Spatial analysis, involving experimental semivariogram evaluation and kriging interpolation, is performed on macroseismic intensity data assumed to represent a regionalized variable. A semivariogram is modeled, showing that data components act at different scale levels. Interpretation of the semivariogram in terms of fractal dimension allows separation of the error component from other scaledependent components. Use of an objective best spatial-range determination for filtering eliminates the subjective choice that is usually based on data-sampling density, permitting the reconstruction of the smoothed interpolated intensity field. Results are given together with error estimation due to local variability and sampling-density distribution. The method is first applied to synthetic macroseismic data with controlled variable error content and sampling density: the ability to rebuild the original, error-free intensity field is demonstrated. Then macroseismic data from an Italian medium-intensity earthquake are analyzed and spatial intensity attenuation reevaluated.228 22 - PublicationRestrictedA journey towards the earth's core at the geophysical museum of rocca di papa (rome, italy)(2007-07)
; ; ; ;Pagliuca, N. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Pietrangeli, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia; ; This paper introduces the Geophysical Museum of Rocca di Papa (Roma, Italy) where visitors can encounter a fascinating journey towards the Earth's core. The aim of the Museum, which was founded on February 26th 2005, is to make the language of Geophysics friendlier and to show the relationship between science and science fiction. The Geophysical Museum is housed in the historical Geodynamic Observatory, built in 1889 by the famous seismologist Michele Stefano De Rossi. The Museum explains the main topics of Geophysics through the use of posters, movie presentations and interactive experiments and presents the stages of scientific research that led to the modern definition of the Earth's internal model. The main focus of the Museum has been school students of all ages, with eight thousand visitors in two years. The Museum connects geophysics to the world of nature and by using science fiction techniques, shows that science is not only the product of certainty or established facts, but also the product of trials and failures. Visitors will find special importance given to seismology, with a special section of ancient and modern seismographs. There is also a room dedicated to a three-dimensional projection system where the visitor can enjoy movies about Alban Hills earthquakes to appreciate the geological evolution of volcanism in this area.256 22 - PublicationOpen AccessTyrgeonet: a global positioning system geodetic network for the geodynamical survey of the Italian peninsula(1993)
; ; ; ; ; ; ;Achilli, V.; Dipartimento di Ingegneria Civile Edile,Università di Roma Tor Vergata, Italia ;Anzidei, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Baldi, P.; Dipartimento di Fisica, Settore Geofisica Università di Bologna, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Marsella, M.; Dipartimento di Ingegneria, Università di Bologna, Italia ;Riguzzi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; ; ; ; 168 319 - PublicationOpen AccessThe November 23, 1980 Irpinia earthquake: an analysis with the new procedure of intensity evaluation(1993)
; ; ; ; ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;De Rubeis, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Maramai, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Murru, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; ; 129 354 - PublicationOpen AccessThe Tor Caldara CO2 Diffuse Degassing Structure (DDS): 222Rn/220Rn output before and after the August, 22, 2005 Anzio Earthquake (Mw=4.6).(2007-07)
; ; ; ; ; ; ; ;Quattrocchi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Voltattorni, N.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Cantucci, B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Cinti, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Pizzino, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Procesi, M.; Roma Tre University; ; ; ; ; ; Soon after a 222Rn and 220Rn survey in soil gases, performed (June 2005) in the frame of the Diffuse Degassing in Italy risk assessment project, a moderate earthquake (Mw=4.6) occurred in the Anzio offshore, on August, 22, 2005, only 5 miles from the Tor Caldara Diffuse Degassing Structure (DDS onward). Having available the pre-earthquake 222Rn and 220Rn grid-map on around 50 soil-gas points and being 222Rn both a stress-pathfinder and a discriminative component of activated-faults, a mirrorlike survey was repeated on the same 50 sites, soon after the close earthquake. Later, during a quiescent-aseismic period (December, 2005), a CO2 flux survey was performed for the same 50 sites, adding detailed measurements (more than 100 sites) for the highest flux sectors. The aim of this survey was both to have an overall picture of the background CO2 flux and to calculate the total budget of CO2 flux throughout the DDS, to better interpret the 222Rn and 220Rn areal surveys before and after the seismic event. Herewith, we distinguish the contribution of organic, diffusive and advective CO2 flux. Hints of convection and strong degassing linked to the fracture field, inside the DDS, have been envisaged on selected points, where continuous monitoring stations could be strategic, for seismic, volcanic and NGH surveillance. Despite we found higher 222Rn values in soils after the earthquake, suggesting an enhanced local degassing probably linked to a stress signal throughout the DDS as a whole, the results highlight an unmodified shape and location of the 222Rn anomalies before and after the earthquake. This evidence excludes both that the activated seismogenic segment has affected in some ways both the DDS degassing patterns and that fracture field changed. A similar result could be expected if the activated fault was oriented along the DDS itself and reached the surface. This evidence is well correlated with the reconstructed focal mechanism of the earthquake, pertaining to the transfer structure of the Ardea Graben , located along a peripheral sector of the degassing Alban Hills volcano and intersecting the DDS Tor Caldara itself. The shape and location of 222Rn anomalies inside the DDS for both the surveys are strictly inversely correlated with the areal CO2 flux data. The geometry of the degassing pathways is probably linked to the barrier action (sealing power) of the clays cropping out in the study area. These clays are generated by the strong leaching of the outcropping sedimentary Pleistocene rocks due to the huge flux of volcanic gas -rich fluids.196 121 - PublicationRestrictedGPS networks in seismic and volcanic areas in central and southern Italy(1990)
; ; ; ; ; ; ;Anzidei, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Riguzzi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Achilli, V. ;Baldi, P. ;Marsan, P.; ; ; ; ;The Italian peninsula is a region interested by great geodynamical processes and by a recent and active tectonics. The observation of the deformation field associated with earthquakes is important to define the processes which take place in the Earth's crust.167 21 - PublicationRestrictedStudy of the seismic sequence of Porto S. Giorgio (Marche)-3 july 1987(1989-07)
; ; ; ;Riguzzi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Tertulliani, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Gasparini, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; In this paper we present some remarks about the Porto S. Giorgio seismic sequence, occurred in central Italy on 3 July 1987 with a main shock of Md=4.9. The sequence, occurred in a low seismicity zone, was characterized by absence of foreshocks. Focal mechanisms of the four greatest shocks, derived from P-first arrivals, show compressive solution with negligible strike components; it seems to confirm the tectonic trend of thrust faults remarked by some authors. Some characteristics of the sequence underline the coupling between the cumulative frequency vs. time trend and the modality of a Kelvin's solid strain release which has a time relaxation of about 5 days. Furthermore we analyse b-value and Gutemberg relation to evaluate the energy release. Finally macroseismic analysis related to the felt area is shown with isoseismal map175 27 - PublicationOpen AccessRocca di Papa observatory reborn museum(2005-11)
; ;Gasparini, C.; INGV – Istituto Nazionale di Geofisica e Vulcanologia, RomaThanks to comune of Rocca di Papa and Istituto Nazionale di Geofisica e Vulcanologia, the historical building of geodynamic observatory, become a geophysics museum: a journey to discover the unreached126 174