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  • 1
    Publication Date: 2017-04-04
    Description: This paper deals with the problem of seismicity at Mt. Vesuvius with a view to providing an estimation of the maximum expected earthquake. Integrated analysis of both historical and current seismicity as well as the geological conditions of Vesuvius and the surrounding areas show that seismogenetic structures may fall within the crater axis and at the boundaries of the volcanic complex. While activation of the whole seismogenetic volume detected by seismicity in the past 30 years would indicate a total seismic moment of Mo = 7.1E+ 15 Nm for a magnitude M = 4.5, knowledge of the area's geological structure suggests faulting surfaces of about 32 km2 with an associated magnitude of M = 5.4. The areas of maximum expected damage differ according to the orientation of the hypothesized structure. Analysis of geological and geophysical data and the damage associated to the AD 62 earthquake shows that the prevailing directions in the faulting planes are NE–SW in the eastern sector of the volcanic complex, and roughly WNW–ESE in the southern part of the volcano along the coast. Comparison of instrumental seismicity and historical data reveals two significantly different energy levels: a lower earthquake level with Mmax = 4.5, corresponding to current seismicity and that which accompanied volcanic activity in the eruptive period from 1631–1944; an upper level with Mmax = 5.4, represented by the AD 62 earthquake. The two levels correspond to two stress states and different seismogenetic structures.
    Description: Published
    Description: 139-149
    Description: 3.6. Fisica del vulcanismo
    Description: 3.10. Sismologia storica e archeosismologia
    Description: 4.3. TTC - Scenari di pericolosità vulcanica
    Description: 5.1. TTC - Banche dati e metodi macrosismici
    Description: JCR Journal
    Description: reserved
    Keywords: Mt. Vesuvius ; seismic hazard ; historical seismicity ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology ; 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2017-04-04
    Description: This paper presents the results of the use of Geographic Information Systems (GIS) in managing information on the effects of earthquakes in historical times on the island of Ischia. The unpublished sources on the Casamicciola earthquake of 28 July 1883 and the extensive bibliography documenting the island’s seismicity from 1228 showed the need to proceed towards a type of data storage that would also allow management of the same data. Application of GIS techniques allowed us to insert, extract, handle, manage and analyse the data for the zoning of seismic damage on the island of Ischia. The end-product consists of information layers, such as maps of isoseismals, the damage, and hazard involved, as well as numerical tables associated to maps. The study was developed using GIS Arc-View 3.2 software (ESRI) and is structured in thematic vectorial levels and rasters. The overlapping themes constitute a cartographic data base of the island. The damaged sites are located on a map at a scale of 1:10,000, with all the information on the 1883 earthquake (total number of houses, number of collapsed houses, collapsed or damaged rooms, photographs, plans of buildings, etc.) being associated to each site. The GIS is structured in such a way as to be able to be integrated with further georeferenced data and with other databases. It is thus able to provide support both for in-depth analyses of the dynamic processes on the island and extend the assessment to other natural risks (volcanic, landslides, flooding, etc.).
    Description: Published
    Description: 379–393
    Description: partially_open
    Keywords: Historical seismicity ; GIS ; seismic hazard ; island of Ischia ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology ; 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 436 bytes
    Format: 503030 bytes
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  • 3
    Publication Date: 2017-04-04
    Description: Rank-ordering analysis is applied to the intertimes between seismic events recorded in the Apennine belt between 40–42° N and 14–16° E from the 15th century onwards. It shows a power law capable of governing the intertimes between 1529 and 368 months and another power law which approximates a random simulation, for the intertimes shorter than 368 months. Only the first power law allows the computation of the return period of major events. Earthquakes with the same energy that are aligned according to different power laws imply the presence of two different populations, indicating, in turn, that the physics of seismic phenomena in the region examined is not straightforward, that the stress is probably not unidirectional and that it acts on a non-isotropic medium. The most probable estimated intertime value for the next event is found to be equal to 60 ± 20 years.
    Description: Published
    Description: 263-278
    Description: partially_open
    Keywords: Historical seismicity ; Apennine chain ; Seismotectonics ; Power laws ; Earthquake prediction ; 04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 436 bytes
    Format: 433786 bytes
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  • 4
    Publication Date: 2017-04-04
    Description: Published
    Description: open
    Keywords: historical seismology ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book
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  • 5
    Publication Date: 2017-04-04
    Description: In this study we provide a general structural picture of Ischia island shallow crust to model the processes occurring at shallow depth, by using geological, geophysical, historical seismicity data and analytical structural models of the island (PENTA & CONFORTO, 1951; CUBELLIS & LUONGO, 1998; CUBELLIS et alii, 2004; CARLINO et alii, 2006; PAOLETTI et alii, 2009; VEZZOLI et alii., 2009; SBRANA et alii, 2009). These studies support the hypothesis of the presence of a shallow laccolith, which is responsible of the resurgence of Mt. Epomeo, following the Green Tuff eruption, volcanic activity and seismicity...
    Description: Published
    Description: Pisa
    Description: 3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
    Description: 3.6. Fisica del vulcanismo
    Description: open
    Keywords: Ischia Island ; laccolith ; magma feeding ; resurgence caldera ; 04. Solid Earth::04.04. Geology::04.04.06. Rheology, friction, and structure of fault zones ; 04. Solid Earth::04.04. Geology::04.04.09. Structural geology ; 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Extended abstract
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  • 6
    Publication Date: 2017-04-04
    Description: Riassunto “Una brusca interruzione e un profondo sconvolgimento sofferse la mia vita familiare per il terremoto di Casamicciola del 1883, nel quale perdetti i miei genitori e la mia unica sorella, e rimasi io stesso sepolto per parecchie ore sotto le macerie e fracassato in più parti del corpo”. Così Benedetto Croce ricorderà questo terremoto che diverrà un laboratorio per la crescita delle conoscenze sui fenomeni sismo-vulcanici. Il terremoto colpì un territorio denso di memoria storica, di paesaggi straordinari, di acque salutari, un luogo di vacanze per una clientela di élite. Il sisma accade in un momento di fervore scientifico per lo studio dei terremoti, con l’Italia capofila mondiale, e di ripensamento del ruolo del paese a livello internazionale a poco più di un decennio dall’Unità Nazionale con Roma capitale. La rinomanza dell’evento a livello europeo impegnò il Governo a un intervento massiccio per i soccorsi. Numerose personalità e famosi scienziati intervennero sulla scena del disastro; nel volume sono ricordati quelli che hanno lasciato le tracce più significative: Francesco Genala, ministro dei Lavori Pubblici; Henry James Johnston-Lavis, medico, con una grande passione e competenza per i vulcani; Luigi Palmieri, direttore dell’Osservatorio Vesuviano; Michele Stefano de Rossi, il primo a introdurre in Italia le scale di intensità per i terremoti e a realizzare una rete sismica; Giuseppe Mercalli, che propose una nuova scala delle intensità e fu direttore dell’Osservatorio Vesuviano; Giulio Grablovitz, fondatore e direttore dell’Osservatorio Geodinamico di Casamicciola.
    Description: Published
    Description: 3.6. Fisica del vulcanismo
    Description: open
    Keywords: Earthquakes, Ischia Island ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book
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