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  • 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous  (6)
  • 04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous
  • Editrice Compositori  (3)
  • AIQUA
  • MDPI Publishing
  • Nature Publishing Group
Collection
Keywords
Publisher
Years
  • 1
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    Lava flow hazards at Mount Etna: constraints imposed by eruptive history and numerical simulations (2014)
    Nature Publishing Group
    Details
    Publication Date: 2017-04-04
    Description: Improving lava flow hazard assessment is one of the most important and challenging fields of volcanology, and has an immediate and practical impact on society. Here, we present a methodology for the quantitative assessment of lava flow hazards based on a combination of field data, numerical simulations and probability analyses. With the extensive data available on historic eruptions of Mt. Etna, going back over 2000 years, it has been possible to construct two hazard maps, one for flank and the other for summit eruptions, allowing a quantitative analysis of the most likely future courses of lava flows. The effective use of hazard maps of Etna may help in minimizing the damage from volcanic eruptions through correct land use in densely urbanized area with a population of almost one million people. Although this study was conducted on Mt. Etna, the approach used is designed to be applicable to other volcanic areas.
    Description: This work was developed within the framework of TecnoLab, the Laboratory for Technological Advance in Volcano Geophysics organized by INGV-CT, DIEES-UNICT, and DMI-UNICT.
    Description: Published
    Description: 3493
    Description: 1V. Storia e struttura dei sistemi vulcanici
    Description: 2V. Dinamiche di unrest e scenari pre-eruttivi
    Description: 3V. Dinamiche e scenari eruttivi
    Description: 4V. Vulcani e ambiente
    Description: 6A. Monitoraggio ambientale, sicurezza e territorio
    Description: 3IT. Calcolo scientifico e sistemi informatici
    Description: JCR Journal
    Description: restricted
    Keywords: Lava flow hazard ; Etna ; 04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous ; 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous ; 05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous ; 05. General::05.02. Data dissemination::05.02.99. General or miscellaneous ; 05. General::05.08. Risk::05.08.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Limited overlap between the seismic gap and coseismic slip of the great 2010 Chile earthquake (2011)
    Nature Publishing Group
    Details
    Publication Date: 2017-04-04
    Description: The MW 8.8 mega-thrust earthquake and tsunami that occurred on February 27, 2010, offshore Maule region, Chile, was not unexpected. A clearly identified seismic gap existed in an area where tectonic loading has been accumulating since the great 1835 earthquake experienced and described by Darwin during the voyage of the Beagle. Here we jointly invert tsunami and geodetic data (InSAR, GPS, land-level changes), to derive a robust model for the co-seismic slip distribution and induced co-seismic stress changes, and compare them to past earthquakes and the pre-seismic locking distribution. We aim to assess if the Maule earthquake has filled the Darwin gap, decreasing the probability of a future shock . We find that the main slip patch is located to the north of the gap, overlapping the rupture zone of the MW 8.0 1928 earthquake, and that a secondary concentration of slip occurred to the south; the Darwin gap was only partially filled and a zone of high pre-seismic locking remains unbroken. This observation is not consistent with the assumption that distributions of seismic rupture might be correlated with pre-seismic locking, potentially allowing the anticipation of slip distributions in seismic gaps. Moreover, increased stress on this unbroken patch might have increased the probability of another major to great earthquake there in the near future.
    Description: Published
    Description: 173-177
    Description: 3.1. Fisica dei terremoti
    Description: 4.2. TTC - Modelli per la stima della pericolosità sismica a scala nazionale
    Description: JCR Journal
    Description: restricted
    Keywords: Source process ; Chile ; Tsunami ; Joint Inversion ; Seismic Gap ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress ; 04. Solid Earth::04.07. Tectonophysics::04.07.06. Subduction related processes ; 05. General::05.01. Computational geophysics::05.01.03. Inverse methods
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
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    Terremoto de L’Aquila del 6 aprile 2009: rilievo macrosismico, distribuzione delle intensità macrosismiche ed implicazioni sismotettoniche (2010)
    AIQUA
    Details
    Publication Date: 2022-06-14
    Description: Viene dato ragguaglio sulle operazioni di rilievo macrosismico relative al terremoto aquilano del 6 Aprile 2009 (Mw=6.3; Io=IX MCS) condotte dal QUEST e del risultato conseguito in termini di distribuzione delle intensità per 316 località visitate. Il terremoto, che ha provocato la distruzione di numerosi centri della conca Aquilana ed oltre 300 vittime, mostra un’area mesosimica allungata in direzione NW-SE, con una coda di forti risentimenti verso SE nella conca subèquana. Questo è in accordo con la geometria, cinematica e dinamica della rottura della struttura sismogenetica, individuata anche grazie alle evidenze di fagliazione di superficie seguite per circa 20 km lungo il versante nordorientale della Valle dell’Aterno, tra Collebrincioni e San Demetrio ne’ Vestini (sistema di faglie di Paganica-San Demetrio). Tale struttura viene anche indicata responsabile del terremoto “gemello” del 1461, oltre che da eventi di più elevata energia, come analisi paleosismologiche e rilievi geologici in corso hanno confermato.
    Description: Published
    Description: 1.11. TTC - Osservazioni e monitoraggio macrosismico del territorio nazionale
    Description: N/A or not JCR
    Description: open
    Keywords: L'Aquila 2009 ; macroseismics ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 4
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    The late stage of retreating subduction in the Alpine-Mediterranean region: constraints from travel time seismic tomography (2008)
    Editrice Compositori
    Details
    Publication Date: 2017-04-04
    Description: Seismological modelling of the upper mantle of the Africa-Eurasia collision region has given images of its structure which can be used to supplement surface (geologic) information in the attempt to understand past and active tectonic processes. A foremost feature of the region is given by the sinuous Alpine-Mediterranean thrust belt, under which subducted lithosphere is imaged by seismic tomography as seismically fast material (colder than ambient rock). Several arcuate structures are present, combining an external thrust front with an internal extensional basin, originated by slab rollback: the Hellenic arc with the Aegean basin, the Calabrian arc with the Tyrrhenian Sea, the Betic-Rif with the Alboran Sea, and the Carpathians with the Pannonian basin. These systems are at different stages of their life, and all but the Hellenic-Aegean appear close to their terminal phase. Shape and extent of subducted slabs provide constraints on their evolution. Tomographic results, in all but the Hellenic-Aegean system, show a general lack of overall continuity of the subducted bodies, and in many cases support the idea that other processes, such as slab detachment or mantle delamination, contributed to shape the present day tectonics. Although tomographic results have steadily improved image resolution with time, differences between studies may lead to different interpretations. Better understanding of processes active at the late phases of subduction needs a close interplay between tomography, geology, and mantle dynamics calculations.
    Description: Published
    Description: 179-215
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: open
    Keywords: tomography ; travel time ; Euro-Mediterranean ; mantle ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 5
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    A technical note on the bias in the estimation of the b-value and its uncertainty through the Least Squares technique (2008)
    Editrice Compositori
    Details
    Publication Date: 2019-11-04
    Description: We investigate conceptually, analytically, and numerically the biases in the estimation of the b-value of the Gutenberg-Richter Law and of its uncertainty made through the least squares technique. The biases are introduced by the cumulation operation for the cumulative form of the Gutenberg-Richter Law, by the logarithmic transformation, and by the measurement errors on the magnitude. We find that the least squares technique, applied to the cumulative and binned form of the Gutenberg-Richter Law, produces strong bias in the b-value and its uncertainty, whose amplitudes depend on the size of the sample. Furthermore, the logarithmic transformation produces two different endemic bends in the Log(N) versus M curve. This means that this plot might produce fake significant departures from the Gutenberg-Richter Law. The effect of the measurement errors is negligible compared to those of cumulation operation and logarithmic transformation. The results obtained show that the least squares technique should never be used to determine the slope of the Gutenberg-Richter Law and its uncertainty.
    Description: Published
    Description: 329-339
    Description: JCR Journal
    Description: open
    Keywords: b-value ; seismology ; least squares technique ; syntheticearthquake catalogs ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
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    Studio macrosismico del terremoto del Gran Sasso (Italia centrale) del 5 settembre 1950: implicazioni sismotettoniche (2007)
    AIQUA
    Details
    Publication Date: 2017-04-04
    Description: Il 5 settembre 1950 alle ore 04.08 (GMT), un forte terremoto fu avvertito in tutta l’Italia centrale e arrecò gravi danni in diversi centri abitati delle province di Teramo, Pescara, L’Aquila e Rieti. Questo evento è considerato il massimo terremoto storico avvenuto nell’area del Gran Sasso d’Italia, zona che, secondo i cataloghi sismici italiani è caratterizzata da un’attività sismica relativamente modesta. Al contrario le zone circostanti sono sede di sismicità più frequente e di forti terremoti storici. Questo lavoro è uno studio di revisione del terremoto che colpì l'area del 5 settembre 1950 e del periodo sismico che ne seguì tra il 1950 e il 1951. Scopo della ricerca è quello di ampliare il quadro delle conoscenze su questo sisma e di inquadrarlo nel contesto sismotettonico dell'area. La ricerca ha condotto al reperimento di moltissimi documenti originali, sinora inediti, sia relativi alla scossa del 5 settembre 1950, che a quella dell’8 agosto 1951 che rappresenta l’evento più forte del periodo sismico successivo alla scossa principale. I risultati riguardano una maggiore completezza delle informazioni sul terremoto, anche relativamente al ruolo delle repliche nel quadro del danneggiamento. Il numero dei punti di intensità risulta triplicato rispetto a quanto finora conosciuto. Gli elementi di analisi contribuiscono al calcolo di nuovi parametri ipocentrali e a fornire una ipotesi interpretativa riguardo alla sorgente responsabile del terremoto. In base ai dati acquisiti sulla distribuzione del danno è possibile ipotizzare che il terremoto del 1950 sia stato causato da una sorgente con direzione circa E-O, al di sotto dell’edificio strutturale della Laga, tra Campotosto e Pietracamela.
    Description: Published
    Description: 195-214
    Description: reserved
    Keywords: Gran sasso d'Italia, ; terremoto del 1950 ; macrosismica ; sismotettonica ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 7
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    Materials for the investigation of The Seismicity Of Algeria And Adjacent Regions during the twentieth century (2006)
    Editrice Compositori
    Details
    Publication Date: 2019-11-04
    Description: Dr. Benouar presents a full and integrated study of the recent seismicity of Algeria and adjacent regions during the twentieth century. He has amassed an impressive amount of macroseismic information pertaining to individual earthquakes, which he combines with instrumental information to reassess the origin parameters of each event. In any compilation of earthquakes it is the additional information beyond the bare accumulation of figures and facts that adds interest and social understanding to the scientific appreciation of the earthquakes themselves. For this it is necessary to know the local conditions, and Dr. Benouar brings out for us very vivid1y the differences between reporting procedures at different times this century, and the ensuing difficulties. It would be most difficult for an outsider to gather the information he presents, and he makes good use of his knowledge of his native land, as well as his professional training as an engineer. We thus learn of the reluctance of the colonial powers to report on damage or casualties outside those inflicted on the expatriate community, and the general difficulties of finding information about earthquakes that occurred during the wars of independence, at a time when effects of even major earthquakes were sometimes minor compared to those of the war itself. He also does not spare us details of political difficulties that arose during periods of reconstruction following recent earthquakes. This work is not restricted, however, to description. He examines the underlying tectonics of the area and deduces estimates of hazard and risk in various parts of the country. He then proceeds to examine the engineering consequences and discuss future needs for building codes and civil protection. Dr. Benouar has produced a work which could well form a model for those wishing to undertake comprelzensive studies of seismicity of other areas, and the measures needed to reduce the effects of catastrophic earthquakes.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: seismology ; Algeria ; 20th century ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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