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  • Articles  (79)
  • 04.06. Seismology  (27)
  • 01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous  (22)
  • 05. General::05.02. Data dissemination::05.02.02. Seismological data  (16)
  • 04. Solid Earth::04.04. Geology::04.04.09. Structural geology
  • Campi Flegrei
  • Creep observations and analysis
  • Wave propagation
  • INGV  (65)
  • EGU - Copernicus
  • Wiley
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Source
Keywords
  • 1
    Publication Date: 2020-12-18
    Description: probably confirm this opinion, with qualifica ons. Historical earthquake catalogues, up to CPTI11 [Rovida et al., 2011], report only one Mw 5.1 event on 13 November 1948: it was located in the Sardinian Sea, and had very modest effects on land. In later decades, the seismic networks did record very few earthquakes of moderate energy (Mw 〈5), mostly located off-shore, either south-east of Cagliari or west of Olbia or in the Sea of Sardinia. The most recent ones (occurred in 2000, 2004 and 2006) had very slight effects on the island. Given the low level of instrumental seismicity and the weak macroseismic effects of known historical earthquakes, Sardinia's seismic risk is perceived as very low. The low seismicity of the region certainly has a geological explana on, given that the Corsica-Sardinia block is among the most stable areas of the Mediterranean basin. “Low”, however, does not mean “non- existent”: recent historical research has improved knowledge on the major known historical earthquake of Sardinia (it occurred on June 4, 1616 and was responsible for minor but widespread damage to the system of coastal watchtowers, south-west of Cagliari) and rediscovered several minor earthquakes, part of which were known to the seismological tradi on but had been almost completely forgo en. This paper collects all the documenta on available at present on the seismic history of Sardinia.
    Description: Published
    Description: 1-160
    Description: 4T. Sismicità dell'Italia
    Description: JCR Journal
    Keywords: Sardinia ; Seismicity ; Seismic history ; Historical Earthquakes ; Historical seismology ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2021-01-22
    Description: Spectral analysis has been applied to almost thou-sand seismic events recorded at Vesuvius volcano (Naples,southern Italy) in 2018 with the aim to test a new tool fora fast event classification. We computed two spectral pa-rameters, central frequency and shape factor, from the spec-tral moments of order 0, 1, and 2, for each event at sevenseismic stations taking the mean among the three compo-nents of ground motion. The analyzed events consist ofvolcano-tectonic earthquakes, low frequency events and un-classified events (landslides, rockfall, thunders, quarry blasts,etc.). Most of them are of low magnitude, and/or low maxi-mum signal amplitude, therefore the signal to noise ratio isvery different between the low noise summit stations andthe higher noise stations installed at low elevation aroundthe volcano. The results of our analysis show that volcano-tectonic earthquakes and low frequency events are easily dis-tinguishable through the spectral moments values, particu-larly at seismic stations closer to the epicenter. On the con-trary, unclassified events show the spectral parameters valuesdistributed in a broad range which overlap both the volcano-tectonic earthquakes and the low frequency events. Since thecomputation of spectral parameters is extremely easy and fastfor a detected event, it may become an effective tool for eventclassification in observatory practice.
    Description: Published
    Description: 67–74
    Description: 1SR TERREMOTI - Sorveglianza Sismica e Allerta Tsunami
    Description: N/A or not JCR
    Keywords: Vesuvius ; Spectral Analisys ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2021-02-01
    Description: All’esperimento “eruzione immaginaria” negli anni scolastici 20172018 e 20182019 hanno contribuito gli Istituti: 2° Circolo Didattico F. Giampaglia di Ercolano; IC 3 De Curtis Ungaretti di Ercolano; IC San Rocco di Marano di Napoli; IC Raffaele Viviani di Napoli; IC 1 Don Bosco Melloni di Portici; IC 3 RodariAnnecchino di Pozzuoli; IC 6 Quasimodo Dicearchia di Pozzuoli; IC 3 CD S. GaetanoGadda di Quarto; DD Scafati 1 di Scafati; ICS De Nicola Sasso di Torre del Greco; IC 5 di Bologna; IC Bonati di Bondeno (FE).
    Description: Da molto tempo il rischio vulcanico è al centro di progetti di divulgazione scientifica, particolarmente in area napoletana, dove l’Osservatorio Vesuviano ha sempre promosso numerose iniziative dedicate all’informazione su pericolosità e rischio vulcanico. In particolare sono state realizzate iniziative formative nelle scuole, sviluppate in collaborazione con il Dipartimento della Protezione Civile, e attività mirate a raggiungere la popolazione più in generale attraverso le visite guidate al Museo della sede storica, oppure con incontri pubblici, mostre, workshops, ecc. organizzati in collaborazione con la Città della Scienza e altri Enti locali. Dal 2005 questa attività formativa si è arricchita attraverso il progetto EDURISK, un’iniziativa più propriamente dedicata all’educazione al rischio sismico e vulcanico nelle scuole, con la realizzazione di corsi di formazione per gli insegnanti. Una delle esperienze più interessanti sviluppate dal progetto EDURISK, è stata la realizzazione nell’anno scolastico 20172018 di un’indagine sull’immaginario di bambini e ragazzi sul rischio vulcanico, con l’obiettivo di individuare, attraverso un’attività creativa l’invenzione di una storia in ambiente vulcanico come percepiscono il contesto vulcanico in cui vivono, come immaginano che possa verificarsi un’eruzione e quale potrebbe essere la loro capacità di risposta. L’indagine è stata realizzata in 23 classi di scuola primaria e secondaria di I grado di Istituti Comprensivi di area vesuviana (Ercolano, Scafati, Torre del Greco) e flegrea (Marano di Napoli, Pozzuoli, Quarto), coinvolgendo complessivamente circa 500 bambini fra gli 8 e i 12 anni. Fra i tanti temi emersi, tre sono fondamentali. In area flegrea la percezione di vivere ‘dentro’ un vulcano è praticamente assente: è pertanto indispensabile attivare percorsi di conoscenza del territorio in cui si vive; per i bambini il passaggio dalla comparsa dei precursori e l’eruzione vera e propria è istantaneo: mancano quindi conoscenze scientifiche specifiche, compresa l’incertezza sulla possibile evoluzione dei fenomeni; infine in caso di eruzione i bambini pensano di doversi salvare da soli: nelle loro storie non esistono istituzioni, un sistema organizzato di protezione civile e di gestione dell’emergenza: è quindi indispensabile e urgente un lavoro educativo sul riconoscimento delle risorse della comunità e di ricostruzione della fiducia fra cittadini e istituzioni.
    Description: Convenzione fra INGV e Dipartimento nazionale della Protezione Civile, Allegato A, tematica “M”
    Description: Published
    Description: 3-42
    Description: 1TM. Formazione
    Description: JCR Journal
    Keywords: Rischio vulcanico ; Edurisk ; Campi Flegrei ; Vesuvio ; scuola ; 05.03. Educational, History of Science, Public Issues ; 05.08. Risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 4
    Publication Date: 2021-05-17
    Description: A comparison between two of the most used scintillation models and experimental data is presented. The experimental data have been derived from a GPS scintillation monitor developed at Cornell University and placed in Tucuman (Argentina), under the peak of the anomaly. The models used (GISM and WBMOD) have been run for the geophysical conditions corresponding to the measurements. The comparison is done by subdividing the information on the basis of an ionospheric grid of 5°×5° surface square boxes. The comparison has been performed for several local times, from 18 LT until 04 LT. Here, only a few cases of particular interest are shown. The goal is to understand if the models are able to forecast actual scintillation morphology (from the satellite navigation systems point of view) and if they could be used to yield an estimate of scintillation effects on satellite navigation systems.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: ionospheric scintillations ; scintillation models ; GPS ; SBAS ; 01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous ; 04. Solid Earth::04.03. Geodesy::04.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2020-12-03
    Description: The global positioning system (GPS) phase scintillation caused by highlatitude ionospheric irregularities during an intense high-speed stream (HSS) of the solar wind from April 29 to May 5, 2011, was observed using arrays of GPS ionospheric scintillation and total electron content monitors in the Arctic and Antarctica. The one-minute phase-scintillation index derived from the data sampled at 50 Hz was complemented by a proxy index (delta phase rate) obtained from 1-Hz GPS data. The scintillation occurrence coincided with the aurora borealis and aurora australis observed by an all-sky imager at the South Pole, and by special sensor ultraviolet scanning imagers on board satellites of the Defense Meteorological Satellites Program. The South Pole (SP) station is approximately conjugate with two Canadian High Arctic Ionospheric Network stations on Baffin Island, Canada, which provided the opportunity to study magnetic conjugacy of scintillation with support of riometers and magnetometers. The GPS ionospheric pierce points were mapped at their actual or conjugate locations, along with the auroral emission over the South Pole, assuming an altitude of 120 km. As the aurora brightened and/or drifted across the field of view of the all-sky imager, sequences of scintillation events were observed that indicated conjugate auroras as a locator of simultaneous or delayed bipolar scintillation events. In spite of the greater scintillation intensity in the auroral oval, where phase scintillation sometimes exceeded 1 radian during the auroral break-up and substorms, the percentage occurrence of moderate scintillation was highest in the cusp. Interhemispheric comparisons of bipolar scintillation maps show that the scintillation occurrence is significantly higher in the southern cusp and polar cap.
    Description: Published
    Description: R0216
    Description: 1.7. Osservazioni di alta e media atmosfera
    Description: 3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale
    Description: JCR Journal
    Description: open
    Keywords: Scintillations ; Solar-terrestrial interaction ; Space weather ; Solar variability and solar wind ; Magnetic storms ; 01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous ; 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation ; 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques ; 01. Atmosphere::01.02. Ionosphere::01.02.07. Scintillations ; 05. General::05.07. Space and Planetary sciences::05.07.02. Space weather
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 6
    Publication Date: 2021-01-05
    Description: To comply with nuclear safety requirements, an in-depth research program for the revision of existing catalogues was initiated back in 1974. The priority of the partners involved in the SISFRANCE project was to establish the most exhaustive documentary databank in order to construct an intensity macroseismic database, concerning both epicentral and punctual observations. The architecture of the SISFRANCE database is presented. The strength of this parametric database is the attribution of reliability coefficients at all levels of interpretations going from the documentary sources to the final intensity estimate. To ensure homogeneity of the database, a general guideline was defined. The resulting macroseismic relational database SISFRANCE contains 65000 intensity observations attesting to the existence of 5283 earthquakes (575 with Io = VI) that have been felt on the French metropolitan territory over the past one thousand years. Thanks to the homogeneous methodology and to the continuous collaboration between BRGM, EDF and IRSN for the past 30 years, SISFRANCE is today a reference database and a key tool for seismic hazard assessment.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: SISFRANCE database ; macroseismic historical seismicity ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 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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  • 7
    Publication Date: 2021-02-19
    Description: Questo rapporto tecnico descrive le attività svolte da SISMIKO [Moretti et al., 2012; 2016a; 2016b; Pondrelli et al., 2016] in occasione della sequenza sismica che ha interessato l’area in provincia di Campobasso tra i comuni di Montecilfone, Guardialfiera e Larino a partire dal 14 agosto 2018 e che ha visto nel terremoto di magnitudo ML 5.2 (MW 5.1) del 16 agosto 2018 (18:19 UTC), ben risentito in un’ampia area che comprende molte regioni dell’Italia centro meridionale, l’evento più significativo della sequenza. SISMIKO è uno dei gruppi operativi dell’Istituto Nazionale di Geofisica e Vulcanologia (INGV) per la gestione delle emergenze sismiche [Pondrelli et al., 2016], e come per ogni terremoto con magnitudo superiore a 5.0, ovvero alla soglia prevista nella vigente Convenzione tra l’INGV e il Dipartimento della Protezione Civile (DPC), a seguito del terremoto del 16 agosto 2018 (ML 5.2) ha predisposto un intervento volto al miglioramento del monitoraggio sismico dell’area interessata. L’integrazione di stazioni sismiche temporanee nella geometria della Rete Sismica Nazionale (RSN [Michelini et al., 2016; INGV Seismological Data Centre]), consente infatti un miglioramento nella individuazione dei terremoti e un perfezionamento del calcolo dei parametri ipocentrali, soprattutto della profondità che è strettamente connessa alla distanza media tra le stazioni sismiche. L’intervento principale è stato svolto nella giornata del 17 agosto [SISMIKO working group, 2018], ma nelle due settimane successive i siti allestiti sono stati più volte visitati e il giorno 30 si è proceduto con l’integrazione di ulteriori 2 stazioni, portando a 5 i punti di acquisizione della rete temporanea. La rete sismica è stata operativa per circa 2 mesi. I dati sono stati trasmessi in tempo reale al centro di acquisizione dati della rete mobile presso la sede di Roma di SISMIKO e al contempo integrati nel sistema di sorveglianza sismica INGV [Michelini et al., 2016] per essere utilizzati nelle localizzazioni e nei prodotti scientifici forniti in tempo reale. On 16 August 2018 at 18:19:04 UTC an earthquake with magnitude ML 5.2 (MW 5.1) occurred in the Molise region. The earthquake was felt in a large area including many regions of Central and Southern Italy. The seismologists on duty in the 24H seismic monitoring room of the National Institute of Geophysics and Volcanology (INGV) located the event in the province of Campobasso, 4 km south­east of Montecilfone and at a preliminary depth of 9 km. The same area was affected two days before by a MW 4.6 event (August 14 at 23.48 Italian time1). Following the MW 5.1 event and the associated aftershock sequence, the SISMIKO Operational Group was activated [Moretti et al., 2012; 2016a; 2016b; Pondrelli et al., 2016] for the installation of temporary seismic stations to integrate the permanent stations of the National Seismic Network (RSN [Michelini et al., 2016; INGV Seismological Data Centre]) deployed in the region.
    Description: Published
    Description: 1-32
    Description: 2SR TERREMOTI - Gestione delle emergenze sismiche e da maremoto
    Description: N/A or not JCR
    Keywords: SISMIKO ; Seismic networks temporary ; Seismic emergency ; Molise ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 8
    Publication Date: 2021-03-01
    Description: Questo lavoro presenta una utility per il GIS MapInfo™ sviluppata per l'archiviazione ed elaborazione dei dati macrosismici dalla fase di georeferenziazione fino al plottaggio finale su mappa. L'identificazione della località associata con un'osservazione macrosismica è un'operazione che talvolta può causare errori ed in seguito problemi nell'analisi ed interpretazione dei dati. La routine MacroMap fornisce uno strumento che in modo semplice e veloce aiuti nell'identificazione della corretta località a cui attribuire l'informazione macrosismica durante lo studio di un terremoto. L'utility è strutturata per utilizzare il formato della directory geografica DIR04 e le procedure adottate nella compilazione del DataBase Macrosismico Italiano DBMI04. MacroMap è stata sperimentata "sul campo" durante alcune indagini macrosismiche e tiene conto dell'esperienza e dei suggerimenti degli operatori del Gruppo QUEST (QUick Earthquake Survey Team). I campi di utilizzo di MacroMap vanno dalla realizzazione speditiva di mappe e tabelle per la produzione di report macrosismici per la Protezione Civile, alla revisione di terremoti storici, grazie all'avanzato sistema di query disponibile per la selezione dei toponimi del database geografico.
    Description: Published
    Description: 1-21
    Description: 5.1. TTC - Banche dati e metodi macrosismici
    Description: N/A or not JCR
    Description: open
    Keywords: Osservazioni macrosismiche ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 9
    Publication Date: 2021-06-21
    Description: The central and eastern United States has experienced only 5 historic earthquakes with Mw 7.0, four during the New Madrid sequence of 1811-1812: three principal mainshocks and the so-called «dawn aftershock» following the first mainshock. Much of the historic earthquake research done in the United States has focused on the New Madrid Seismic Zone (NMSZ), because the largest New Madrid earthquakes may represent the archetype for the most damaging earthquakes to be expected in intraplate regions. Published magnitude values ranging from 7.0 to 8.75 have generally been based on macroseismic effects, which provide the most direct constraint on source size for the events. Critical to the interpretation of these accounts is an understanding of their historic context. Early settlments clustered along waterways, where substantial amplification of seismic waves is expected. Analyzing the New Madrid intensity values with a consideration of these effects yields preferred values of Mw 7.2-7.3, 7.0, and 7.4-7.5 for the December, January, and February mainshocks, respectively, and of 7.0 for the «dawn aftershock». These values are consistent with other lines of evidence, including scaling relationships. Finally, I show that accounts from the New Madrid sequence reveal evidence for remotely triggered earthquakes well outside the NMSZ. Remotely triggered earthquakes represent a potentially important new wrinkle in historic earthquake research, as their ground motions can sometimes be confused with mainshock ground motions.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: New Madrid earthquakes ; intraplate ; historic ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 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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  • 10
    Publication Date: 2020-11-25
    Description: Since 1981, relative gravity measurements have routinely carried out at the Campi Flegrei caldera, a densely populated area. The gravity network also includes two absolute stations periodically measured with a laboratory absolute gravimeter, which does not permit field measurements. At the end of 2014, the Osservatorio Vesuviano, Section of Napoli of the Istituto Nazionale di Geofisica e Vulcanologia (INGV-OV), acquired a portable absolute gravimeter that allows field operations on outdoor sites. Therefore, in 2015 a dense absolute gravity network was established in Campi Flegrei. This will permit an advanced approach for volcano monitoring. The net consists of 36 stations, 34 of which located inside the caldera and placed upon or very close to gravity stations belonging to the relative network. Five surveys were carried out on June 2015, on February and November 2017, on October 2018 and on October 2019. The comparison with height changes suggests that significant Δg are partly due to the uplift occurred over the same time intervals and mostly to shallow processes associated to the dynamic of the local hydrothermal system. The comparison with the gradients observed during the last large uplift (1982-1984) and the following subsidence (1985-2003) confirms this observation. These results suggest that the present activity may be due to a transient or pulsating phenomenon as the alternating recharge/discharge of fluids in the surface hydrothermal system. Gravity changes detected by absolute measurements are in good agreement with those obtained by relative ones, and confirms the feasibility of this methodology for volcano monitoring. Finally, they also encourage replacing the relative networks with absolute ones, with all the consequent advantages.
    Description: Published
    Description: 41-54
    Description: 4V. Processi pre-eruttivi
    Description: JCR Journal
    Keywords: Gravimetria assoluta ; Campi Flegrei
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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