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  • 1
    Publikationsdatum: 2008-01-01
    Print ISSN: 1862-9016
    Digitale ISSN: 1862-9024
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Publiziert von De Gruyter
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Publikationsdatum: 2017-04-04
    Beschreibung: Le reti permanenti GPS costituiscono una importante risorsa per una serie di studi tecnologici e scientifici. La carenza di conoscenze in studi di tettonica attiva, che comprendono anche la parte di sismologia come l'accumulo di deformazione sulle faglie, è stata a lungo frenata dalla mancanza di reti permanenti GPS sufficientemente dense distribuite su tutto il territorio nazionale. In particolare, la definizione di una placca Adriatica e la sua terminazione meridionale sono ancora materia di dibattito (Oldow et al., 2002; Battaglia et al. 2004). Inoltre, di recente, alcuni importanti lavori (Hollenstein, et al. 2004; D'Agostino and Selvaggi; Serpelloni et al. 2005) hanno mostrato che valori di deformazione molto più alti di quanto si pensava prima sono stati effettivamente riscontrati nella nostra regione e che solo l'uso di una rete densa di stazioni, quindi di un campionamento ad alta densità nelle aree dove sono maggiori le velocità relative, permette di osservare in modo corretto il rilascio, o accumulo, di deformazione. Infine, il contributo della geodesia alla sismologia sta diventando sempre più importante sia nella definizione del rilascio cosismico durante un terremoto e sia nell'osservazione e modellazione dell'accumulo intersismico di deformazione elastica su faglie attive. Da qualche anno, l'Istituto Nazionale di Geofisica e Vulcanologia (INGV) ha impiegato notevoli risorse e sforzi per rispondere a tali temi scientifici. Selvaggi et al. (2006) hanno gettato le basi e mostrato i primi sviluppi di una rete GPS permanente, la Rete Integrata Nazionale GPS (RING), creata con l'obiettivo di dare un forte contributo scientifico ai temi sopra citati La rete RING (Fig. 1a), nella sua completezza, rappresenta ad oggi non solo un punto di riferimento per studi di carattere scientifico ma anche una robusta infrastruttura tecnologica e informatica per l'archiviazione dei dati GPS per diverse altre reti locali e regionali (Regione Puglia, Regione Friuli, Leica Geosystems). Tali reti, contribuiscono quotidianamente all'acquisizione, all'interno di un server, di dati per un totale di oltre 300 stazioni distribuite sul territorio nazionale (Fig. 1b). Se, poi, si considera anche l'aspetto del processamento dei dati GPS, l'utilizzo di dati GPS appartenenti ad altre reti (locali, regionali o anche esterne al territorio italiano) fa sì che ogni analista utilizzi i dati, in media, di circa 650 stazioni GPS permanenti al giorno.
    Beschreibung: Published
    Beschreibung: L'Aquila - Italia
    Beschreibung: 1.9. TTC - Rete GPS nazionale
    Beschreibung: reserved
    Schlagwort(e): Geodesy ; GPS ; RING Network ; Tectonics ; 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Poster session
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2017-04-04
    Beschreibung: Between November 2nd and 3rd 2002 a shallow submarine gas eruption occurred in the area between Lisca Bianca, Bottaro and Lisca Nera islets located about 2.5 km from Panarea Island, in the Aeolian volcanic archipelago, Southern Italy. To estimate the current crustal deformation of this active volcanic area and to evaluate its volcanic hazard, a local GPS network was set up and repeatedly surveyed in the time span December 2002 - October 2005, with the aim to monitor the evolution of the crustal deformation related with the exhalative crisis. The local GPS network consists in 11 GPS stations located in the Panarea archipelago. First results show vertical movements and an active strain, up to 20x 10-6 across the islets. Strain axes display NNW-SSE extension and ENE-WSW compression. We interpret these data as relative to the deflation of the area, after the exhalative crisis, along existing tectonic structures. Present day observation of the exhalative field confirm that the gas emission migrated from NE to NW oriented fractures, in agreement with the strain tensor changes with time, estimated through GPS data.
    Beschreibung: This work has been funded by Italian Dipartimento della Protezione Civile.
    Beschreibung: In press
    Beschreibung: 1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
    Beschreibung: JCR Journal
    Beschreibung: open
    Schlagwort(e): GPS,Aeolian arc, Panarea, gas eruption ; 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion ; 04. Solid Earth::04.07. Tectonophysics::04.07.08. Volcanic arcs
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2019-10-10
    Beschreibung: In November 2002 a submarine gas eruption started offshore 3 Km east of Panarea island (Aeolian Island) on top of a shallow rise of 2.3 km2 surrounded by islets forming a small archipelago. This event has posed new concern on a volcano generally considered extinct. Panarea island and its archipelago (~ 3.3 km2) are the emergent portion of submarine stratovolcano more than 2000 m high and 20 Km across; exhalative activity due to a shallow hydrothermal system is well known since historical times. To monitor and study ground deformation associated with anomalous gas emission, a local GPS network (PANAREA) was designed, set up and measured during time span December 2002 - October 2006. The network consists of nine sites (six constructed after 2002) located on Panarea and on the islets. GPS data analysis was performed combining episodic campaigns of Panarea and other local networks located in the Aeolian area, carried out between 1995 and 2006, and data of continuous European and Italian sites. The results show at Panarea volcano two distinct crustal domains characterized by different kinematics and styles of deformation. The merging of GPS and structural data suggest the relationship among gas vent distribution, submarine volcanological structures and ground deformations. The actual distribution of the estimated strain-rate is consistent with the structural setting.The general subsidence and shortening in the islets area can be interpreted as the response of the surface to the variation of the hydrothermal system reservoir which is progressively reducing its pressure after the gas eruption. A simple first order approach to the modelling of the hydrothermal system is the use of Okada sources.To evaluate the coupled thermo-hydro-mechanical processes going on in Panarea, a two-step model will be implemented. The model first involves the simulation of pore pressure and temperature changes due to fluid circulation. Then the mechanical response of the porous rock is calculated based on the linear theory of poro-elasticity.
    Beschreibung: Unpublished
    Beschreibung: Reykjavík, Iceland
    Beschreibung: 1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
    Beschreibung: open
    Schlagwort(e): GPS, monitoring, Aeolian Islands ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations ; 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Oral presentation
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Publikationsdatum: 2021-11-09
    Beschreibung: The Colli Albani Volcano has recently developed particular interest in the geophysical community for some peculiar characteristics imputable to a recent residual volcanic activity, thus evidencing that it cannot be considered extinguished yet. On April 2006 an airborne laser scanning (ALS) survey of the Albano and Nemi craters has been carried out to obtain a high resolution digital terrain model (DTM) of the area. We have compared the accuracy of the ALS heights with those obtained by a fast GPS kinematic survey, obtaining maximum deviation within 50 cm. Then, we have integrated the ALS survey of the craters and the bathymetry of the Albano lake to achieve a complete DTM, useful for morphological studies. In addition, with a GNSS/RTK survey (July 2007) we have estimated the Albano and Nemi mean lake levels respectively at 288.16 m and 319.02 m (asl). Based on the integrated DTM and the newly estimated water level values, we have evaluated about 21.7 106 of m3 the water volume loss of the Albano lake from 1993 to 2007, with an average rate of about 1.6 106 m3/yr.
    Beschreibung: Published
    Beschreibung: 239-250
    Beschreibung: 1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
    Beschreibung: N/A or not JCR
    Beschreibung: reserved
    Schlagwort(e): Albano, Nemi, DTM, ALS survey ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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