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  • 1
    Publication Date: 2017-04-04
    Description: The abstracts herein – collected for the 34th Course of the International School of Geophysics, held in Erice, Italy (“Ettore Majorana” Foundation and Centre for Scientific Culture, 25-30 September, 2010) – focus on geophysical, geological and geochemical methods applied to the planning of the soundest energy mix in densely populated countries, where the coexistence of different technologies requires unique underground facilities and resources. In the framework of IEA and EU programmes, where the concepts of “smart grids” and “smart cities” are prevailing, we rather propose the concept of “smart region” planning the use of both underground and surface areas in a new social-energetic paradigm of “zero kilometer” life. The coexistence of geological storage of CO2 and natural gas, geothermics and, possibly, nuclear waste temporary storage (near surface or geological) is today necessary owing to the progressive decrease of space and resources. In this context, the following technologies turn out to be very important: renewables (geothermal energy), nuclear power, clean coal technologies via CO2 Capture and Storage (CCS), Enhanced Oil Recovery (EOR), Enhanced Coal Bed Methane (ECBM), non-conventional gas exploitation, and seasonal storage of natural gas (also for strategic reserves). These technologies have been recently emphasized in Italy by the Ministry of Economic Development and by the Ministry of the Environment and Territory, as well as by research institutions such as INGV and CNR. Key topics addressed during the Course were: • Geological storage and disposal: assessment of available volume and structures. • Subsurface geological resources: management of potential conflicts among various technologies. • Geological site characterization and risk assessment for policy makers and regulators: the role of the energy industry. • New high tech frontiers for geothermal power production. • New concepts in nuclear waste disposal. • Numerical simulation software for geothermal exploration, geological storage and nuclear waste disposal. • Sharing subsurface data coming from oil & gas and geothermal exploration. • High resolution characterization of shallow aquifers and reservoirs: multi-strata exploitation by different energy technologies. • Case histories and natural analogues: “learning by doing” and “acceptable risk” concepts. The 34th Course of the International School of Geophysics is dedicated to students and young contract researchers starting their carreers in a period of energetic-environmental global crisis. Although their scientific contribution is of high quality, they are usually underpaid in public research institutions with respect to volatile staff of some international organizations who, making use of the results of governmentfunded research, make final decisions on low-carbon energy technologies.
    Description: Published
    Description: 1-102
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: N/A or not JCR
    Description: open
    Keywords: deep geothermics ; CO2 and natural gas storage ; radioactive waste disposal ; underground coexistence ; energy mix ; 05. General::05.09. Miscellaneous::05.09.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2017-04-04
    Description: Nel presente lavoro vengono descritte le potenzialità del compensatore GLOBK di proprietà del MIT nella combinazione e stabilizzazione di soluzioni derivanti da differenti standard di analisi dato di varie reti GPS. Le grandi prestazioni garantite da questo metodo di compensazione permettono di ottenere risultati di alta qualità e precisione pur disponendo di una potenza di calcolo limitata, caratteristica dei PC di nuova generazione e medio-basso profilo. Nel lavoro sono descritti i risultati delle compensazioni in termini di campi di velocità globali/regionali e serie temporali. Inoltre tutte le caratteristiche delle soluzioni finali quali: polo di rotazione, definizione dei sistemi di riferimento, ecc sono facilmente ottenibili.
    Description: Published
    Description: 1-19
    Description: 1.9. Rete GPS nazionale
    Description: N/A or not JCR
    Description: restricted
    Keywords: GPS ; Reti Permanenti ; Quasi Osservazioni ; Combinazione ; Compensazione ; Sistemi di Riferimento ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2019-11-04
    Description: We carried out geomorphologic and geological investigations in a south-eastern tributary valley of the Tiber River in Rome, the Grottaperfetta valley, aimed to reconstruct its buried geometry. Since results of the geomorphologic study evidenced anomalies of the stream beds, we performed geoelectric and boreholes prospecting to check whether recent faulting, rather than an inherited structural control, possibly contributed to the evolution of the alluvial valley. Vertical offsets of the stratigraphic horizons across adjacent boreholes were evidenced within the Late Pleistocene-Holocene alluvium and its substratum. In order to rule out the effects of irregular geometry of the alluvial deposits, we focussed on sectors where vertical offsets affected all the stratigraphic horizons (alluvium and pre-Holocene substratum), showing an increasing displacement with depth. We identified a site where repeated displacements occur coupled with a lateral variation of soil resistivity, and we drilled an oblique borehole aimed to cross and sample the possible fault zone affecting the terrain. A 7 cm thick granular layer, inclined 50°÷70° on the horizontal, was recovered 5 m b.g., and it was interpreted as the filling material of a fracture. The convergence of the reported features with independent evidence from geoelectric and geomorphologic investigations leads to hypothesize the presence of a faulting zone within the Holocene alluvial terrains and to propose the excavation of a trench to verify this hypothesis.
    Description: Published
    Description: 849-865
    Description: 3.2. Tettonica attiva
    Description: JCR Journal
    Description: open
    Keywords: Holocene stratigraphy ; recent tectonics ; Tiber valley ; Rome ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2019-11-04
    Description: Approximately 20 km north-east of Rome, along the modern trace of the Tiburtina road, recent archaeological diggings have brought to light a system of aqueduct galleries constructed by Roman engineers. This site falls inside the Acque Albule Basin, a travertine plateau Upper Pleistocene in age, that has been interpreted as a rhombshaped pull-apart basin created by strike-slip faulting within a N-S shear zone. This study provides evidence that two narrow water channels of this aqueduct system were significantly deformed by tectonic movement that occurred subsequent to their construction (II-III century A.D.). The geometry of the deformation pattern is compatible with that expected for a shear zone bounded by N-S oriented, right-lateral faults. The palaeomagnetic study of the volcanic formation («Pozzolane Rosse» Formation, 457± 4 kyr) containing the Roman aqueduct system evidences significant clockwise rotation around sub-vertical axis, consistent with the above-mentioned tectonic style.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: palaeomagnetism ; block rotation ; active tectonics ; Rome ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism ; 05. General::05.09. Miscellaneous::05.09.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 1605277 bytes
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  • 5
    Publication Date: 2019-11-04
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 05. General::05.09. Miscellaneous::05.09.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 16454174 bytes
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  • 6
    Publication Date: 2019-11-04
    Description: In order to evaluate the detection and localisation improvement of a small aperture array in the Northern Apennines, we installed an irregularly spaced test configuration in the vicinity of Città di Castello (CDC) for a period of two weeks. The experimental array consisted of nine 3-component stations with inter-station distances between 150 m and 2200 m. Seismic data were digitised at 125 Hz and telemetered to a mobile acquisition, processing and storage centre. The data could only be recorded in trigger mode. The peculiarity of the test array installation was the exclusive use of 3-component sensors at all array sites, which also allowed beamforming for S-phases on the horizontal components. Since the altitudes of the single array sites differed considerably among each other, for f-k analysis and beamforming an elevation correction was included. During the two weeks of operation about 20 local earthquakes with magnitudes ML〈2.6, 1 regional, and several teleseismic events were recorded. In addition to these events, the array occasionally triggered on coherent noise-signals generated by local industrial activity. The data analysis was performed by means of f-k analysis and beamforming, providing wavenumber characteristics of the incident plane wave. Typical apparent velocities were determined to be 4.8 km/s and 6 km/s for Pg-phases and ~10 km/s for Pn-phases. We observed local seismic events, which occurred just beneath the array. In these cases wavefronts with unusual high apparent velocities, similar to those found for the Pn-phase, were observed. Since no continuously recorded array data were available, we extrapolated the lower detection magnitude threshold as a result of the SNR improvement due to array beamforming. Compared to the actual detection threshold of MT ~1.6 reached by the national seismic network in this area, a nine element array would improve this value up to MT ~ 0.8.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: seismic array ; beamforming ; f-kanalysis ; Central Apennines ; 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 2861057 bytes
    Format: application/pdf
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