ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Publication Date: 2018-03-16
    Description: L’evento sismico che il 21 agosto 2017 ha colpito l’isola di Ischia è stato studiato con i dati satellitari della missione Sentinel-1 (S1) dell’Agenzia Spaziale Europea (ESA). Grazie a questi dati e alla consolidata tecnica dell’interferometria differenziale SAR (DinSAR), è stato misurato il campo di deformazione del suolo associato all’evento. Sono state elaborate alcune immagini SAR, acquisite sia in orbita ascendente che in orbita discendente, le quali hanno poi consentito di stimare le componenti di spostamento della superfice terrestre lungo le direzione verticali e orizzontali (est-ovest). Le mappe ottenute hanno evidenziato come lo spostamento ha avuto luogo prevalentemente lungo la componente verticale, la quale raggiunge circa 3.6 cm in abbassamento, mentre la componente est-ovest essa è sostanzialmente risultata trascurabile, pur mostrando un piccola porzione in movimento verso ovest di 1.5-1.8 cm, localizzata a circa 500m a ovest dell’epicentro. I dati satellitari hanno inoltre consentito una prima modellazione della sorgente sismica. In particolare, sono state eseguite due inversioni dai dai dati SAR, ipotizzando due diversi tipi di sorgenti: una sorgente crack closure, e una di shear su piano.
    Description: Published
    Description: Sede OV – INGV
    Description: 1T. Deformazione crostale attiva
    Keywords: 2017 Ischia earthquake ; InSAR deformation analysis and modeling
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2022-11-21
    Description: The ML 5.8 earthquake that hit the island of Crete on 27 September 2021 is analysed with InSAR (Interferometry from Synthetic Aperture Radar) and GNSS (Global Navigation Satellite System) data. The purpose of this work is to create a model with sufficient detail for the geophysical processes that take place in several kilometres below the earth’s surface and improve our ability to observe active tectonic processes using geodetic and seismic data. InSAR coseismic displacements maps show negative values along the LOS of ~18 cm for the ascending orbit and ~20 cm for the descending one. Similarly, the GNSS data of three permanent stations were used in PPK (Post Processing Kinematic) mode to (i) estimate the coseismic shifts, highlighting the same range of values as the InSAR, (ii) model the deformation of the ground associated with the main shock, and (iii) validate InSAR results by combining GNSS and InSAR data. This allowed us to constrain the geometric characteristics of the seismogenic fault and the slip distribution on it. Our model, which stands on a joint inversion of the InSAR and GNSS data, highlights a major rupture surface striking 214◦, dipping 50◦ NW and extending at depth from 2.5 km down to 12 km. The kinematics is almost dip-slip normal (rake −106◦), while a maximum slip of ~1.0 m occurred at a depth of ca. 6 km. The crucial though indirect role of inherited tectonic structures affecting the seismogenic crustal volume is also discussed suggesting their influence on the surrounding stress field and their capacity to dynamically merge distinct fault segments.
    Description: Published
    Description: 5783
    Description: 2T. Deformazione crostale attiva
    Description: 3T. Fisica dei terremoti e Sorgente Sismica
    Description: JCR Journal
    Keywords: SAR ; GNSS ; interferometry ; source modelling ; 27 September 2021 earthquake ; Crete system faults ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2024-01-23
    Description: Volcano ground deformation is a tricky puzzle in which different phenomena contribute to the surface displacements with different spatial–temporal patterns. We documented some high variable deformation patterns in response to the different volcanic and seismic activities occurring at Mt. Etna through the January 2015–March 2021 period by exploiting an extensive dataset of GNSS and InSAR observations. The most spectacular pattern is the superfast seaward motion of the eastern flank. We also observed that rare flank motion reversal indicates that the short‐term contraction of the volcano occasionally overcomes the gravity‐controlled sliding of the eastern flank. Conversely, fast dike intrusion led to the acceleration of the sliding flank, which could potentially evolve into sudden collapses, fault creep, and seismic release, increasing the hazard. A better comprehension of these interactions can be of relevance for addressing short‐term scenarios, yielding a tentative forecasting of the quantity of magma accumulating within the plumbing system.
    Description: Published
    Description: 847
    Description: OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
    Description: JCR Journal
    Keywords: Etna Volcano ; SAR interferometry ; GNSS ; flank collapse ; magma intrusion
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...