Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"Source parameters"”.
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Low-frequency source parameters of twelve large earthquakes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Determination of earthquake source parameters from inversion of body waves
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Earthquake source parameters, seismicity, and tectonics of the oceanographer transform fault
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
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Earthquake source parameters, seismicity, and tectonics of North Atlantic transform faults
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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Inversion of seismic source parameters for weak mining-induced and natural earthquakes
… inversion scheme to derive point and finite source parameters for weak earthquakes, here intended with the unusual meaning of earthquakes with magnitudes at the limit or below the bottom magnitude threshold of standard source inversion routines. The adopted inversion approaches entirely rely …
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The relationship of source parameters of oceanic transform earthquakes to plate velocity and transform length
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Retrieval of earthquake source parameters in inhomogeneous anisotropic mediawith application to swarm events in West Bohemia in 2000
… techniques for the retrieval of earthquake source mechanisms assume isotropic rock properties. By means of moment tensors, equivalent forces acting at the source are used to explain the radiated wavefield. Conversely, seismic anisotropy, i.e. directional dependence of elastic properties, has …
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Source parameters of the major historical earthquakes in the Tien-Shan region from the late 19th to the early 20th century
… difficulties, for example, not always the true parameters of the recording system are known. Another complicated task is the digitization of those records - a very time-consuming and delicate part. Therefore a special set of techniques is developed and modern methods are adapted for the …
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Source Parameters and Tectonic Setting of the 2017 St. Elias Earthquake Sequence near the Southern Terminus of the Eastern Denali Fault, Northwestern Canada
On May 1, 2017 two earthquakes of magnitude 6.2 and 6.3, respectively, occurred in proximity to the eastern Denali fault (EDF). These double mainshock events were followed by more than 2,700 aftershocks. Moment-tensor inversion of the mainshock signals shows that the initial event produced reverse …
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ΧΑΡΑΚΤΗΡΙΣΤΙΚΕΣ ΠΑΡΑΜΕΤΡΟΙ ΣΕΙΣΜΙΚΗΣ ΠΗΓΗΣ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΗΣ ΑΝΤΙΣΤΡΟΦΗΣ ΤΩΝ ΚΥΜΑΤΩΝ ΧΩΡΟΥ: ΕΛΛΑΔΑ ΚΑΙ Η ΕΥΡΥΤΕΡΗ ΠΕΡΙΟΧΗ ΤΗΣ
… GREEK EARTHQUAKES HAVE BEEN ANALYZED TO YIELD SOURCE PARAMETERS. AN INVERSION TECHNIQUE OF TELESEISMIC BODY WAVES WAS USED FORRECORDINGS AT 30-90. RECORDING FROM 12-16 STATIONS OF P AND SH WAVEFORMS HAVE BEEN INVERTED SIMULTANEOUSLY, TO GIVE FOCAL MECHANISMS, SOURCE DURATION, RAPTURE …
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A High-Resolution Study of Seismogenic Structures: The Making of a Double Seismic Zone
Precise source parameters, including focal depths and mechanisms, of 74 large to moderate-sized $(m\sb{b} \ge 5.5)$ earthquakes that occurred along the Kuril-Kamchatka arc between 1963 and 1991 were determined by inverting teleseismic P and SH waveforms. Based on these results, I delineated …
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Global investigation of large earthquakes using InSAR and long-period seismic data
… comprehensive global archive of InSAR-determined source models (ICMT database) compiled from the literature, which I use to independently assess source parameters reported in global and regional seismic catalogues. In general there is good agreement between InSAR and seismic source models, but …
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Global investigation of large earthquakes using long-period seismic data
Robust earthquake source models provide key information for a wide range of applications in Earth Sciences, such as in global tectonics, natural hazards and tomographic studies. In this thesis, we study large magnitude earthquakes using the Earth’s normal modes, which are standing waves resulting …
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Ground motions and source mechanisms of earthquakes in multiscales : microseismicity to macroseismicity
This thesis focuses on the source mechanisms of Earthquakes of different scales, from the micro-seismicity in oil/gas fields in Oman, to moderate earthquakes in Kuwait, and finally to pico-seismicity, i.e. acoustic emission, in the laboratory. To investigate the source mechanisms as well as their …
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Geophysical signatures of crack initiation and growth in rocks under uniaxial compression
… in the field of seismology, in natural resource extraction, different rock-breaking processes such as drilling and blasting, and in geological investigations. In order to investigate and predict the rock behavior in the above-mentioned practical situations, it is essential to understand …
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Seismic Source and Attenuation Studies in the Central and Eastern United States
… States (CEUS), this dissertation focuses on the source parameters and wave propagation characteristics of both tectonic earthquakes and induced earthquakes in the CEUS. The infrequent occurrence of significant earthquakes in the CEUS limits the necessary observations needed to understand …
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Seismic studies of subducted lithosphere
… dynamic processes in the mantle using source parameters, waveforms, and travel times associated with deep-focus earthquakes. First, I systematically determined the focal mechanisms and depths of all large-to-moderate sized earthquakes that occurred along the Kuril-Kamchatka in the past …
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Apparent Stress Estimates of Seismic Events Associated with Underground Mining Operations in Sedimentary Rock Units: Implications for Improving Underground Roof Collapse Warning Systems
… two underground mine locations. These seismic source parameters are estimated from source spectra have been corrected for the instrument response, propagation effects and bandwidth limitations. The apparent stress, which provides an estimate of the stress drop (or stress release) associated …
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UNDERSTANDING ERUPTIVE DYNAMICS, PLUME DISPERSAL AND PARTICLE TRANSPORT FOR RISK ASSESSMENT IN PAROXYSMAL MAFIC ERUPTIONS
… activity at open vent volcanoes is a significant source of hazard as it occurs with limited and short-term precursory activity and has a severe impact both on proximal and distal regions because of tephra fallout and ash dispersion. Characterization of eruptive dynamics is therefore fundamental to …
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Modelo Termo-mecânico-metalúrgico de chapa de aço naval DH36 soldada com MAG/John
… a methodology was proposed to determine the heat source parameters to ensure a suitable temperature distribution, through a mathematical model, experimental data, and numerical models to calibrate and verify the methodology. Different cases were studied, such as weld bead deposition and fillet …
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