GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Document type
Keywords
Publisher
Language
Years
  • 1
    facet.materialart.
    Unknown
    Study of tropospheric delay using a dense GNSS array and low-cost receivers for weather applications on Mt. Somma-Vesuvius area (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-06-29
    Description: The GNSS is largely used for geophysical applications and data from global reference networks are routinely used to monitor ground displacements. The INGV manages a dense GNSS network designed for monitoring the active Neapolitan volcanoes in the Southern Italy. For high-precision geodetic applications, each observation site needs a professional GNSS receiver and antenna that are expensive instruments. On the other way, GNSS receiver are now largely used in any mobile devices (smartphones, any smartwatches, cars) and this has involved the development and diffusion of a series of low-cost GNSS receivers. The objective of this work is twofold, first of all, the results of the analysis of about 14 years (2006-2019) of continuous GNSS data (cGNSS) are presented. Our analyses, which focus on Mt. Somma-Vesuvius area, concern the assessment of the tropospheric delay to be used as a probe tool to quantify precipitable water and tracking its time-space evolution. An increase in precipitable water at an average rate of about 2 mm/decade turns out from our analysis.The second objective is the comparison (on a one-month data sample) of the tropospheric parameters obtained with our prototype instrument, named “V60”, a low-cost receiver supporting L1 and L2 frequency integrated with an environmental sensor in a single CPU with those retrieved from a co-located GNSS geodetic station. The results obtained so far are encouraging, because the two sets of parameters are in good agreement.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 2
    facet.materialart.
    Unknown
    3-D Modelling of Campi Flegrei Ground Deformations: Role of Caldera Boundary Discontinuities (2006)
    Birkhauser Verlag
    Details
    Publication Date: 2017-04-04
    Description: Campi Flegrei is a caldera complex located west of Naples, Italy. The last eruption occurred in 1538, although the volcano has produced unrest episodes since then, involving rapid and large ground movements (up to 2 m vertical in two years), accompanied by intense seismic activity. Surface ground displacements detected by various techniques (mainly InSAR and levelling) for the 1970 to 1996 period can be modelled by a shallow point source in an elastic half-space, however the source depth is not compatible with seismic and drill hole observations, which suggest a magma chamber just below 4 km depth. This apparent paradox has been explained by the presence of boundary fractures marking the caldera collapse. We present here the first full 3-D modelling for the unrest of 1982–1985 including the effect of caldera bordering fractures and the topography. To model the presence of topography and of the complex caldera rim discontinuities, we used a mixed boundary elements method. The a priori caldera geometry is determined initially from gravimetric modelling results and refined by inversion. The presence of the caldera discontinuities allows a fit to the 1982–1985 levelling data as good as, or better than, in the continuous half-space case, with quite a different source depth which fits the actual magma chamber position as seen from seismic waves. These results show the importance of volcanic structures, and mainly of caldera collapses, in ground deformation episodes.
    Description: Published
    Description: 1329-1344
    Description: partially_open
    Keywords: Campi Flegrei ; deformations ; caldera ; 3-D ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations ; 04. Solid Earth::04.03. Geodesy::04.03.08. Theory and Models ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 478 bytes
    Format: 1671146 bytes
    Format: text/html
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Bayesian inversion of 1994-1998 vertical displacements at Mt Etna: evidence for magma intrusion (2006)
    Blackwell publishing
    Details
    Publication Date: 2017-04-04
    Description: We have developed a Bayesian method for the inversion of static ground deformations at volcanic areas.
    Description: Published
    Description: 935-946
    Description: partially_open
    Keywords: Bayesian inversion ; deformation ; Geodesy ; magma ; Mt Etna ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 473 bytes
    Format: 827257 bytes
    Format: text/html
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Monitoraggio del bradisismo del bradisismo flegreo, nel periodo maggio 2004 - marzo 2006, attraverso misure CGPS e di livellazione. (2007)
    Details
    Publication Date: 2017-04-04
    Description: in the file
    Description: Unpublished
    Description: bolzano
    Description: open
    Keywords: NONE ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Format: 1080510 bytes
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Independent component analysis as a tool for ground deformation analysis (2007)
    Blackwell
    Details
    Publication Date: 2017-04-04
    Description: Independent component analysis (ICA) is a recent and well-known technique used to separate mixtures of signals. This technique has been applied to the ground deformation time-series recorded at the permanent GPS network of the Osservatorio Vesuviano—INGV in order to characterize the deformation background level in the Neapolitan volcanic area. The analysis revealed the presence of five independent periodic signals common at all the GPS stations; some of them are interpreted as effects of earth tides. The residual signal at each station represent the local ground deformation. Unfortunately the ICA cannot provide the absolute amplitude of the components, indeed we are not able to obtain a residual amplitude at each station. Then we used a stationarity analysis in order to investigate the eventual presence of local transient deformations. The ICA technique combined with the stationarity analysis has shown to be a very interesting tool for individuating ground deformation trends and could be very useful in volcanic areas monitoring.
    Description: Published
    Description: 1305–1310
    Description: 1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
    Description: JCR Journal
    Description: reserved
    Keywords: independent component analysis ; ground deformationin ; signal processing ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 05. General::05.01. Computational geophysics::05.01.04. Statistical analysis
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    ANALISI DELLE COMPONENTI INDIPENDETI (ICA) NELLO STUDIO DELLE DEFORMAZIONI DEL SUOLO IN AREE VULCANICHE (2007)
    Details
    Publication Date: 2017-04-04
    Description: Independent component analysis (ICA) is a recent and well-known technique used to separate mixtures of signals. This technique has been applied to the ground deformation time-series recorded at the permanent GPS network of the Osservatorio Vesuviano-INGV in order to characterize the deformation background level in the Neapolitan volcanic area. The analysis revealed the presence of five independent periodic signals common at all the GPS stations; some of them are interpreted as effects of earth tides. The residual signal at each station represent the local ground deformation. Unfortunately the ICA cannot provide the absolute amplitude of the components, indeed we are not able to obtain a residual amplitude at each station. Then we used a stationarity analysis in order to investigate the eventual presence of local transient deformations. The ICA technique combined with the stationarity analysis has shown to be a very interesting tool for individuating ground deformation trends and could be very useful in volcanic areas monitoring.
    Description: Published
    Description: Centro Congressi Lingotto, Torino
    Description: open
    Keywords: (ICA) ; deformazioni del suolo ; aree vulcaniche ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 05. General::05.01. Computational geophysics::05.01.04. Statistical analysis
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Resurgence and flank failure of Mt. Epomeo, Ischia Island (Southern Italy) (2008)
    Società Geologica Italiana - Roma
    Details
    Publication Date: 2017-04-04
    Description: Risorgenza e collasso laterale del Monte Epomeo, Isola d’Ischia Il Monte Epomeo (787 m a.s.l.), ubicato nel settore centrale dell’isola d’Ischia, mostra lo smantellamento del settore meridionale, depositi di debris e franamenti diffusi che testimoniano la natura instabile del monte. A seguito dell’eruzione ignimbritica del Tufo Verde dell’Epomeo (55.000 anni), che genera una struttura calderica (10x7 km2), inizia la risorgenza della caldera fino alla formazione del Monte Epomeo. Il sollevamento, generato dall’intrusione di un laccolite fino a circa 1 km di profondità, avrebbe determinato una forte instabilità gravitativa del blocco risorgente e prodotto uno o più collassi laterali. Questi hanno lasciato una struttura a ferro di cavallo, tipica di processi da “avalancing”, aperta verso sud, e depositi con topografia “hummocky” estesi a sud dell’Epomeo e rilevati recentemente da esplorazioni sul fondo marino. Il processo che ha generato il collasso e la formazione di un avalanche caldera è stato esaminato attraverso l’analisi della dinamica e dei caratteri geologici, geomorfologici e strutturali dell’area. Attualmente l’isola è caratterizzata da una fase di stasi della risorgenza testimoniata da una condizione di moderata stabilità dei versanti dell’Epomeo. Quanto osservato indicherebbe una bassa dinamica endogena nell’isola.
    Description: REGIONE AUTONOMA DELLA SARDEGNA ;PROVINCIA DI SASSARI;COMUNE DI SASSARI;Univ.di Cagliari,Dip.di Scienze della terra;Univ.di Sassari,Istituto diScienze Geolog e Mineral.;Univ.di Siena,Centro di Geotecnologie
    Description: Published
    Description: Sassari
    Description: 3.5. Geologia e storia dei sistemi vulcanici
    Description: 5.1. TTC - Banche dati e metodi macrosismici
    Description: open
    Keywords: Ischia Island ; flank collapse ; resurgence caldera ; avalanche caldera ; 04. Solid Earth::04.04. Geology::04.04.09. Structural geology ; 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Isola di Vulcano (Isole Eolie) movimenti verticali del suolo: livellazione di precisione ottobre 2003 (2005)
    Details
    Publication Date: 2017-04-04
    Description: The levelling network installed and managed by the Osservatorio Vesuviano for monitoringvertical ground movements on Volcano island is currently made up of 100 benchmarks(bm) and extends about 24 km as a whole. The reference benchmark for calculating height variations is benchmark 1A located at Volcano Piano, which is a relatively stable area as compared with the northern part of the island. The presently operating network has been enlarged and thickened several times since June 1976, when the first levelling line was installed and surveyed. Twentyseven surveys has been conducted between June 1976 and October 2003. Actually, the configuration of the network presents a greater density of benchmarks in the center-northern sector of the island. The measurement tecnique used is precise levelling. The surveys are performed with autolevelling instruments (Wild NA2) equipped with optical micrometers and invar rods. The last levelling survey has been carried out in the first two weeks of October 2003. The comparison of September 1999 (previous levelling) with October 2003 data indicates a significant subsidence of the center-northern area of the island.
    Description: Osservatorio Vesuviano - INGV
    Description: Published
    Description: open
    Keywords: Volcano island ; Levelling ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: report
    Format: 251995 bytes
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Renewed ground uplift at Campi Flegrei caldera (Italy): New insight on magmatic processes and forecast (2007)
    Agu
    Details
    Publication Date: 2017-04-04
    Description: Campi Flegrei caldera, including the extremely urbanised city of Naples, is the most risky volcanic area in the World. The last eruption in the area (1538) occurred at the end of some decades of ground uplift, superimposed to secular subsidence. During the last four decades, it experienced a huge uplift phase, reaching about 3.5 m in 1985, when a subsidence phase started. Recent geodetic data demonstrate that such a subsidence phase has terminated, and a new uplift episode started in November 2004, with a low but increasing rate leading to about 0.04 m of uplift till the end of October 2006. A new indicator, based on the monitoring of maximum horizontal to vertical displacement ratio with continuous GPS, indicates that this uplift is likely to be associated with input of magmatic fluids from a shallow magma chamber. The method is promising to monitor magma intrusion processes, at this and other volcanoes. Citation: Troise, C., G. De Natale, F. Pingue,
    Description: Published
    Description: L03301
    Description: 3.6. Fisica del vulcanismo
    Description: 1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
    Description: JCR Journal
    Description: reserved
    Keywords: Campi Flegrei caldera ; magmatic processes ; 04. Solid Earth::04.03. Geodesy::04.03.99. General or miscellaneous ; 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous ; 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    AREA VULCANICA NAPOLETANA: 10 ANNI DI OSSERVAZIONI GPS (2007)
    Details
    Publication Date: 2017-04-04
    Description: L’area napoletana è una delle zone a più alto rischio vulcanico, per la presenza di tre strutture vulcaniche attive (il Somma-Vesuvio, la caldera dei Campi Flegrei e l’Isola d’Ischia) e per l’intensa urbanizzazione della zona. La concentrazione dei suddetti vulcani attivi in un’area molto urbanizzata rende fondamentale la presenza di un sistema di monitoraggio che registri i fenomeni connessi al processo vulcanico in atto e che dia informazioni utili per modellarne il comportamento. Tra i vari fenomeni che generalmente sono associati ai processi vulcanici, le deformazioni statiche giocano un ruolo importante per lo studio dei parametri delle sorgenti magmatiche e per la loro modellazione. Nell’area vulcanica napoletana è presente una estesa rete GPS (sia permanente che discreta) che negli ultimi 10 anni ha permesso di raccogliere una mole importante di dati e di avere informazioni circa la dinamica in atto. I dati raccolti in tale periodo, a causa dei rapidi sviluppi della tecnologia GPS, della strumentazione, delle metodologie di processamento, presentavano alcune disomogeneità nella qualità, nell’archiviazione e nell’elaborazione. Pertanto è stato necessario un notevole lavoro di verifica, correzione ed omogeneizzazione dal punto di vista qualitativo di tutti i dati disponibili. Successivamente si è potuto procedere al riprocessamento dei dati, utilizzando il software GPS Bernese v. 5.0, secondo i più recenti standard IGS. Questo lavoro ha permesso di creare un database accurato di tutti i dati GPS disponibili per l’intera area vulcanica napoletana e il conseguente miglioramento della qualità dei risultati ha fornito un utile contributo all’interpretazione dei movimenti del suolo avvenuti negli ultimi anni. In particolare, i nuovi dati ottenuti hanno permesso un’accurata descrizione dell’andamento temporale dei modesti fenomeni di sollevamento (mini-uplift) che hanno interessato la caldera flegrea negli ultimi anni.
    Description: Published
    Description: Centro Congressi Lingotto, Torino
    Description: open
    Keywords: area napoletana ; osservazioni GPS ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 05. General::05.01. Computational geophysics::05.01.01. Data processing
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...