Global ETD Search
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Showing 1 to 6 of 6 for “"GEOPHYSICAL SIGNALS"”.
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The consequences of gas slug ascent in a stratified magma on Strombolian eruption dynamics
… of volcanic eruptions and interpretation of geophysical signals. This study investigates slug ascent through a rheologically stratified magma column using analogue laboratory experiments, numerical modelling and 3D computational fluid dynamic simulations. The results illustrate (1) the range …
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The New Concept of GRACE Gradiometry and the Unravelling of the Mystery of Stripes
… gradiometer mode is shown to be able to capture geophysical signals at multiscale resolution between [8, 128] spherical harmonics. Both GRACE and GRACE-FO suffer from a disturbing artifact, commonly known as longitudinal stripes, whose origin is yet to be determined. The presence of stripes in …
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GPS Imaging of Vertical Land Motion and Earthquake Coseismic Displacements in the GPS Mega-Network
… improves the spatial resolution of observable geophysical signals. Together, these improvements helped motivate the GPS Imaging technique, an analysis method that interpolates spatiotemporal GPS trends between stations to construct a crustal velocity field representative of coherent movement of …
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Numerical simulations of magma chamber dynamics at Campi Flegrei, and associated seismicity, deformation and gravity changes
… refilling of shallow magma chambers, and on the geophysical signals detectable by seismic, deformative and gravimetric monitoring networks that are associated with this phenomenologies. Indeed, the refilling of magma chambers is a process frequently occurring just before a volcanic eruption; …
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Examining the past to prepare for the future: Quaternary magma storage in the Main Ethiopian Rift and implications for volcanic hazard and resource potential
… or phase, can dramatically influence the geophysical signals observed at the surface. For example, the enhanced compressibility of an exsolved volatile phase will dampen geodetic monitoring signals. Magnetotelluric (MT) surveys are commonly used in Ethiopia, however, have sometimes …
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ΒΕΛΤΙΣΤΟΙ ΑΛΓΟΡΙΘΜΟΙ ΚΑΤΕΡΓΑΣΙΑΣ ΓΕΩΦΥΣΙΚΩΝ ΔΕΔΟΜΕΝΩΝ
THIS THESIS DEALS WITH GEOPHYSICAL SIGNAL PROCESSING: SPECIFICALLY IT DEALS WITH THE DECONDUCTION PROBLEM. IN THE FIRST PART, STATE SPACE MODELS ARE STUDIEDAND A GENERALIZED OPTIMAL DECONVOLUTION ALGORITHM IS COMPARED WITH REGARDS TOBOTH PERFORMANCE AND COMPUTATIONAL COMPLEXITY TO EXISTING …