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  • 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous  (24)
  • 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry  (13)
  • Etna
  • INGV  (39)
  • Nature Publishing Group
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  • 1
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    Gas geochemistry for the Los Azufres (Michoacán) geothermal reservoir, México (2006)
    INGV
    Details
    Publication Date: 2020-11-23
    Description: Gas data of the Los Azufres geothermal field were analyzed using a method based on equilibrium of the Fischer- Tropsch (FT) reaction: CH4 + 2H2O = 4H2 +CO2 and on the combined pyrite-hematite-magnetite (HSH2) reactions: 5/4 H2 +3/2 FeS2 +3/4 Fe2O3 + 7/4 H2O = 3 H2S +Fe3O4 in order to estimate reservoir temperature and excess steam. The solution of equilibrium equations produces a grid (FT-HSH2). This method is suitable for reservoirs with relatively high H2S but low H2 and NH3 concentrations in the fluid as is the case of the Los Azufres well discharges. Reservoir temperature and reservoir excess steam values were estimated for initial and present conditions in representative wells of the field to study the evolution of fluids, because of exploitation and waste fluids reinjection. This method was very useful in estimating reservoir temperatures in vapor wells, while in two-phase wells it was found that as the well produces a smaller fraction of water, the reservoir temperature estimation agrees qualitatively with results from cationic or silica geothermometers. For liquid-dominated wells the reservoir temperature estimations agree with temperatures obtained from the well simulator WELFLO. This indicates that FT-HSH2 results provide the temperature of the fluid entering the well where the last equilibrium occurs. Results show a decrease in reservoir temperatures in the southern zone of the field where intensive reinjection takes place. With exploitation, it was also noted that the deep liquid phase in the reservoir is changing to two-phase increasing the reservoir steam fraction and the non-condensable gases in well discharges.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: Los Azufres geothermal field ; gas geochemistry ; geothermal gas equilibria ; reservoir exploitation ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Seismological constraints on the intrusive mechanism leading the 2001 Etna eruption (2012)
    INGV
    Details
    Publication Date: 2012-02-03
    Description: The 2001 Etna eruption occurred from July 17th to August 9th, 2001 and was preceded by several days of intense seismicity and ground deformation. We investigated the seismic activity recorded during November 2000 - June 2001 interval time preceding the eruption, to understand the meaning of the seismicity connected to the dike intrusion, that locally modified the stress field acting in the area. The earthquakes were recorded by the permanent local networks operating during that time and run by the Istituto Internazionale di Vulcanologia (IIV-CNR) and the Sistema POSEIDON. During the analyzed period, 683 earthquakes have been firstly localized by means of a 1D velocity model derived from Hirn et al., 1991 using the software HypoEllipse [Lahr, U. S. Geol. Survey, Open-File Report, 89/116, 81 pp., 1989]. In order to further improve the quality of the seismic dataset, we extracted 522 earthquakes with Gap less than 200°, Erh 〈 1.5 km, Erz 〈 2 km, RMS less than 0.5 sec, and a minimum number of S phases equal to 2. This latter seismic dataset was relocated using TomoDD code [Zhang and Thurber, BSSA, 93, 1875-1889. 2003] and a 3D velocity model [Patanè et al., Science, 313, 821- 823, 2006 after modified]. Using first motion polarity data, 3D fault plane solutions were computed by means of the software FPFIT [Reasenberg and Oppenheimer, U.S. Geological Survey Open File Report, 85/739, 109 pp, 1985]. Then, adopting restricted selection criteria (Npol more than 12; focal plane uncertainties less than 20°; number of solutions 〈 2; number of discrepancies less than 15%), we selected 116 FPSs. This dataset represented the input file for the stress and strain tensors computation using the inversion codes developed by Gephart and Forsyth,[ JGR 89: 9305-9320, 1984] and by Kostrov [Izv Acad Sci USSR Phys Solid Earth, 1, 23-40], respectively. On the basis of P and T axes distribution and the orientation of the main seismogenic stress and strain axes, we put some seismological constraints on the recharging phase leading to the 2001 Etna eruption.
    Description: Published
    Description: Salina
    Description: 1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive
    Description: open
    Keywords: Etna ; stress ; strain ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
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  • 3
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    Samuel Warren Carey - Commemorative memoir (2007)
    INGV
    Details
    Publication Date: 2017-04-03
    Description: Emeritus Professor Samuel Warren Carey passed away on 20 March 2002 at age 90. He was born at Campbelltown, New South Wales on 1st November 1911, and attended school at the Canterbury Boys High School. Carey’s father was a printer, who became a public lecturer when he arrived in Australia. His mother’s people were early Australian settlers. The Carey home was a farm near Campbelltown and as a boy, little Samuel walked nearly seven miles to School and back each day, an activity that prepared him for work in harsh climatic and environmental conditions. Sam Carey’s large family included two sisters and four brothers, one of whom died in World War II. At the University of Sydney, in 1929, Carey enrolled in chemistry, physics, and mathematics and only as a fourth subject – geology. However, he was soon reoriented towards geology as his main subject by Sir Edgeworth David, an Antarctic explorer. This preference developed from his liking for fieldwork in geology, combined with lab work. He was strongly inclined towards sports (hockey, sailing, rugby, marksmanship, canoeing) and physical activities (cave exploration, rock climbing, hiking, jungle expeditions, parachuting). He graduated in Geology from the University of Sydney earning a Bachelor of Science with First Class Honours in 1933, Master of Science in 1934, and Doctor of Science in 1939. At university he founded the Student’s Geological Society in 1931 and was its first president. He has been a pioneer in geology all his life. He was fortunate to participate as a protagonist for two and possibly three revolutions in the Earth sciences. He challenged the concept of continents in fixed positions from the outset and from 1946 to 1956 he taught a version of intercontinental movement with subduction in deep ocean trenches. This came to be called ‘plate tectonics’ some twenty years later but at the time when no one believed in any form of intercontinental movement, Carey’s version was also called ‘continental drift’ by default. Carey developed a new way to interpret orogens. He did not ascribe the building of mountain chains to compression – as is commonly accepted by the geological community involved in contraction or pulsation tectonics. Carey ascribed it to isostatic instability where rising mantle beneath deep sediment filled trenches causes diapiric uplift. The observed folding was explained as the consequent downward gravitational sliding of uplifted strata. This mountain building concept is still considered valid today and it constitutes part of a more diversified classification of mountain evolution that has been developed by Cliff Ollier. Carey proposed abandonment of the subduction concept, and put forward step by step the concept of Earth expansion. Carey – using the orocline concept – generalised his views on movement between continents, demonstrating that the continents could fit together better if the Earth was smaller in size.
    Description: Published
    Description: 85-95
    Description: open
    Keywords: History of global tectonic theories ; Expanding Earth ; S.W. Carey ; Hobart ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 4
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    Guida al Museo dell'Osservatorio Vesuviano (2008)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: Il Vesuvio è noto nel mondo soprattutto per la grande eruzione del 79 d.C., che distrusse in soli due giorni Pompei, Ercolano, Oplonti e Stabia. Dopo il 79 d.C., il Vesuvio ha alternato periodi di attività, caratterizzati da frequenti eruzioni di media energia, a periodi di riposo, lunghi anche molti secoli e interrotti da violente eruzioni esplosive come quelle del 472 d.C. e del 1631. L’attività del vulcano negli ultimi tre secoli è stata caratterizzata da eruzioni di moderata energia ma di grande effetto spettacolare, che hanno reso il Vesuvio meta di viaggiatori, scienziati, letterati e artisti da tutto il mondo. Dopo l’eruzione del 1944, il vulcano è entrato in una fase di quiescenza, la cui durata è impossibile da prevedere. Negli ultimi decenni il vulcano è stato caratterizzato da una debole attività fumarolica, prevalentemente nell’area craterica, e da attività sismica con scosse di energia medio-bassa. La storia eruttiva del Vesuvio indica che il vulcano non può essere considerato estinto ed è molto probabile che l’attuale quiescenza venga interrotta da una nuova, violenta eruzione. L’Osservatorio Vesuviano, inaugurato nel 1845 da Ferdinando II re delle Due Sicilie, è il primo osservatorio vulcanologico al mondo. Ha permesso per oltre centocinquanta anni l’osservazione minuziosa delle eruzioni vesuviane e dei loro precursori. Oggi vigila sullo stato di attività dei vulcani campani, pronto a cogliere i primi segni di riattivazione. La mostra Vesuvio: 2000 anni di osservazioni conduce il visitatore attraverso un affascinante percorso nel mondo dei vulcani, e del Vesuvio in particolare: descrive i vari tipi di eruzioni e i pericoli relativi, spiega come si ricostruisce la storia di un vulcano, presenta ricche collezioni di campioni di rocce e minerali vesuviani e di strumenti storici, libri e dipinti. È possibile anche osservare la registrazione in tempo reale di dati sismici della rete dell’INGV - Osservatorio Vesuviano. L’obiettivo principale del Museo è fornire soprattutto agli abitanti dell’area vesuviana, ma anche al vasto pubblico che visita il Vesuvio, informazioni sui principali pericoli vulcanici attesi e sulle metodologie di monitoraggio.
    Description: Published
    Description: 5.8. TTC - Formazione e informazione
    Description: open
    Keywords: museo ; vesuvio ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book
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  • 5
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    The earth sciences in the scientific letters of Giovanni Capellini (2010)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: Giovanni Capellini (1833-1922) was one of the leading representatives of the Italian and international scientific community from the mid-19th century until 1922, the year of his death. Professor of Geology at the University of Bologna from 1860, geologist, palaeontologist and archaeologist, in 1871 he organised, straight after the unification of Italy, the 5th International Congress in Archaeology and Prehistoric Anthropology, first in Italy, and in 1881 brought to Bologna, for the first time ever in Italy, the 2nd International Geological Congress. His studies and publications strongly influenced the geological thinking of his times. At the Archiginnasio Library in Bologna there are as many as 30,000 documents from his scientific letters (The Capellini Archive), the result of an intense correspondence he had with geologists, seismologists, astronomers and meteorologists, but also with people from the world of culture and politics. The letters relating to the earth sciences, from scientific but also political point of view, are the majority. The archive includes letters from more then 4,300 senders, of which at least 25% foreign ones incuding Charles Lyell (geologist), Emmanuel Friedlaender (volcanologist), Philip Eduard De Verneuil (naturalist), Henry James Johnston Lavis (volcanologist).
    Description: Published
    Description: 667-677
    Description: 5.2. TTC - Banche dati di sismologia strumentale
    Description: JCR Journal
    Description: open
    Keywords: Giovanni Capellini ; history of earth sciences ; scientific letters ; 2nd International Geological Congress ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
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    Ott Christoph Hilgenberg in twentieth-century geophysics (2007)
    INGV
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    Publication Date: 2017-04-04
    Description: The main points of the life and scientific production of Ott Christoph Hilgenberg (1896-1976) have been reconstructed. The events took place between America and Berlin: in America from 1925 to 1928 the young Hilgenberg, with a diploma in Mechanical Engineering, worked as a Geophysicist in an oil prospecting company. It was there that he probably developed his interdisciplinary ideas, which, influenced in various ways by the European cultural climate, brought him into the field of global tectonics. He conceived a theory about the expansion of the Earth based on the nature of the gravity field. In 1933, the theory was published in his classic work 'Vom wachsenden Erdball'. Upon his return in Germany he performed various types of research at the School of Engineering, then that of Geology and Paleontology at the Technical University of Berlin. He was also briefly involved as editor of the scientific publications at the Technical University of Berlin, where he made a contribution towards saving the book collection as the war ended. During the years spent in Berlin, he continued to refine his elegant version of the theory of Earth’s expansion publishing articles and books on this subject up to the last years in his life. The importance of Hilgenberg lies in the fact that he marks the beginning of the integration of various scientific disciplines from Physics to Paleontology and Paleomagnetism, in support of a universal tectonic theory, and that he made paleogeographic reconstructions on globes with smaller radii than the present one. All those who have worked or are working with one of the versions of expansion tectonics owe him enormous gratitude for his inspiration and for the scientific and moral lesson of fifty years spent in unflagging defence of his ideas. The material gathered and kindly made available by his daughter Helge has been indispensable for this recalling.
    Description: Published
    Description: 25-41
    Description: open
    Keywords: Tectonic theories ; expanding Earth ; O.C. Hilgenberg ; Berlin ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 7
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    Roberto Mantovani an Italian defender of the continental drift and planetary expansion (2007)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: Roberto Mantovani, violinist and scientist,born in Parma on March 25, 1854. He was part of an orches-tral team reaching the volcanic Réunion Island in 1878. During his stay on the island, Mantovani had the occasion of observing the huge volcanic fractures on the Indian ocean shore near the town of Saint Denis. He argued that, on a global scale, all the continents might have undergone the same disjunction processes as the volcanic flanks. The global fractures are today the oceans. After several years from his observations, Mantovani published his idea in 1889 in the Bulletin of the Societé des Sciences et des Arts of Saint Denis, where the Italian established his family and became Consul of Italy. After an economic crisis and an epidemic plague in the Réunion Island, Roberto Mantovani left his post as Consul to go and live in San Servan, near the port of Saint Malo, in northern France, where he continued his activity as violinist, managing a school of music. As a scientist, he gave public conferences on the idea of planetary expansion. Mantovani was not a mere precursor of the continental drift idea: instead, Mantovani’s ideas on Earth expansion were more general compared to those of Wegener who was not taking into account the possibility of variation of the Earth’s radius. Roberto Mantovani, violinist and scientist, was part of an orches-tral team reaching the volcanic Réunion Island in 1878. During his stay on the island, Mantovani had the occasion of observing the huge volcanic fractures on the Indian ocean shore near the town of Saint Denis. He argued that, on a global scale, all the continents might have undergone the same disjunction processes as the volcanic flanks. The global fractures are today the oceans. After several years from his observations, Mantovani published his idea in 1889 in the Bulletin of the Societé des Sciences et des Arts of Saint Denis, where the Italian established his family and became Consul of Italy. After an economic crisis and an epidemic plague in the Réunion Island, Roberto Mantovani left his post as Consul to go and live in San Servan, near the port of Saint Malo, in northern France, where he continued his activity as violinist, managing a school of music. As a scientist, he gave public conferences on the idea of planetary expansion. His more famous paper, quoted later by Wegener, was published in 1909, in a popular magazine 'Je m’instruis'. The paper contains the first suggestive mapping of the breakup of the Pangea continent based on geological arguments. The great novelty in the 1909 paper was the mapping of the Pacific view: dotted lines were drown between pairs of geographical points which once were in contact while today are separated by the huge extension of the Pacific basin. The idea was that the corresponding points were in contact before the expansion of the Earth. The enlarging of the huge fractures formed all oceans. We had to wait the sixties to find the same kind of lines in the Indian and Atlantic oceans in plate tectonics. According to plate tectonics this is not true for the Pacific Ocean, because in this case the plate movement is inverse and the ocean tends towards closing. The 1909 Pacific map was forgotten, and only Mantovani’s Pangea representation is reproduced today in some books dealing with the history of science.
    Description: Published
    Description: 71-74
    Description: open
    Keywords: Hystory of global tectonic theories ; Expanding Earth ; R. Mantovani ; Parma ; Réunion ; San Malò, Paris ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 8
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    Le attività di informazione scientifica: uno studio sull'efficacia divulgativa (2008)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: In the last years the assessment of the science outreach activity has become a fundamental moment of the planning and realization of the activities of the Laboratorio of Didattica and Divulgazione Scientifica of Rome. On the occasion of the XVIII Edizione della Settimana della Cultura Scientifica e Tecnologica, we have established to experiment a new effectiveness science outreach assessment centred on two observation points: the users of the initiatives and the laboratory staff. From this model two different assessment tools derived: the Satisfaction Questionnaires, filled by users and the Technical Questionnaires, filled by the laboratory staff. This formulation has allowed us to get complex information on the whole science outreach process and has guaranteed a better impartiality in the assessment. The data collected offers some information on the key elements to achieve and to improve the effectiveness of outreach of a scientific initiative.
    Description: Published
    Description: 1-24
    Description: 5.8. TTC - Formazione e informazione
    Description: N/A or not JCR
    Description: open
    Keywords: outreach ; assessment ; educational ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 9
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    RELAZIONI TRA FLUIDI CIRCOLANTI E TETTONICA ATTIVA NEL SETTORE MERIDIONALE DELL’ARCO CALABRO: UNO STRUMENTO PER LA VALUTAZIONE DEI PROCESSI SISMOGENETICI (2009)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: Le metodologie di indagine geochimica applicate ad un’ampia porzione dell’Appennino meridionale, esteso dalla Calabria settentrionale ai Monti Nebrodi, nell’ambito del progetto INGV-DPC S2, hanno consentito di valutare le caratteristiche dei fluidi emessi in coincidenza di importanti lineamenti strutturali, permettendo di evidenziare le relazioni intercorrenti tra l’assetto tettonico e la genesi, la circolazione ed il comportamento dei fluidi circolanti. L’area di studio rappresenta la porzione più meridionale dell’Arco Calabro, il cui stile deformativo dominante dal Pleistocene medio all’attuale, è caratterizzato da una estensione ESE-WNW. Nella Sicilia nord-orientale, le faglie neotettoniche dislocano i livelli crostali più superficiali e si dispongono secondo direzioni preferenziali orientati circa NW-SE con meccanismi deformativi a componente trascorrente ed estensionale e N-S/NE-SO con meccanismi deformativi trascorrenti, a tratti con componente compressiva. Le strutture crostali radicate sono rappresentate dal sistema “Patti-Eolie”, che si connette a terra con il sistema “Tindari-Letojanni” e dal “sistema di Messina”. Il primo mostra, anche a livello sismologico, caratteri deformativi transtensivi; nel secondo sistema, caratterizzato da faglie a prevalente componente distensiva del rigetto la catena presenta un tasso di sollevamento recente non uniforme, con valori massimi lungo la costa messinese ionica e tassi minori lungo quella tirrenica. L’esistenza di fenomeni attivi di sollevamento regionale è dimostrato da alcune evidenze, come la presenza di argille marine quaternarie affioranti diverse centinaia di metri al di sopra del livello del mare nonché di piattaforme di abrasione tirreniane ben sviluppate ad una altitudine di circa 130 m. nei pressi di Taormina e sul versante calabrese dello stretto di Messina. La struttura tettonica più importante che interseca il sistema Ibleo-Maltese è costituito dal sistema di faglie di Messina, orientato NNE-NNW. Il terremoto di Messina del 1908 è stato attribuito ad una “faglia cieca” nell’area di Messina. Lungo le principali strutture tettoniche, sono presenti attività idrotermali e di degassamento note da tempi storici, che dal punto di vista geochimico mostrano caratteristiche molto diverse in funzione della loro ubicazione.
    Description: Published
    Description: Reggio Calabria
    Description: 3.2. Tettonica attiva
    Description: open
    Keywords: fluidi ; Tettonica attiva ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Extended abstract
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  • 10
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    Educational strategies to reduce risk: a choice of social responsibility (2012)
    INGV
    Details
    Publication Date: 2017-04-04
    Description: This work develops a critical reflection on the activities for information, training and education conducted by a group of researchers of the INGV in recent years. In particular, our analysis, from an epistemological point of view, is between: science outreach, the link between science and the world; science teaching and its role of contact between science and school; risk education, imaged as a process able to develop a culture of risk in relation to the territory in which we live. These issues are critically analyzed on the basis of experience gained since 1995. The educational methodologies tested in "peacetime", out of seismic events, with the EDURISK Project are compared with those experienced during the emergency in Abruzzo. Increasingly today, we refer to prevention as a primary strategy of defense against risk. But very often the responsibility of making prevention falls on the others as government, institutions, local authorities and the citizen perceive themselves as powerless against the inevitability of natural events and refer to the rulers for the implementation of effective prevention policies. As researchers, what are the most effective actions we can take to influence the risk reduction and motivate the choices of people? The effectiveness of our interventions must be based on scientific information, on a specific training, or must be reached to develop values, actions, awareness? Our interventions must be oriented and developed to inform, to train or to educate?
    Description: Published
    Description: 445-451
    Description: 5.9. Formazione e informazione
    Description: JCR Journal
    Description: open
    Keywords: Risk education, Seismc risk, Volcanic risk ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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