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 16 of 16 for “"active seismic"”.
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Applicability of high strength concrete for buildings in active seismic regions
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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1D shallow sedimentary subsurface imaging using ambient noise and active seismic data
… of meters of sediment cover. I imaged the seismic 1D shear wave velocity (and possibly the 1D compressional wave velocity). This information is not only required for any seismic risk assessment, geotechnical engineering or microzonation activities, but also for exploration and global …
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Injection Induced Seismicity Modeling and Application to the Karapiti Reinjection Area, Wairakei, New Zealand
… specially designed for injection induced seismicity integrates fluid flow, heat transfer, mechanical deformation and seismic rupture sequences. The applicability of the hydro-mechanical and thermo-hydro-mechanical coupled earthquake sequence numerical models is examined with a variety of …
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THE SEDIMENT AND CRUSTAL STRUCTURE OF THE SOUTHEASTERN UNITED STATES
… It has long been suspected that the current seismicity in the SEUS is related to zones of weakness inherited from past structural boundaries; however, the mechanisms that dictate the size and location remain poorly understood and the ground shaking hazard posed by widespread sedimentary …
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Active wavefront correction in laser interferometric gravitational wave detectors
… improved suspensions and test mass substrates, active seismic isolation, and higher input laser power. Even with the highest quality optics available today, however, finite absorption of laser power within transmissive optics, coupled with the tremendous amount of optical power circulating in …
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Geospatial Analyses of Seismic Hazards and Risk Perception in Libya
<p>Libya is not considered a highly active seismic region. However, several earthquakes of magnitude >5.0 have occurred there. This dissertation analyzes the seismicity of Libya in order to better understand earthquake hazards, related geomorphic features, and the current evolution of Libyan …
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Seismic characterization of geothermal reservoirs by application of the common-reflection-surface stack method and attribute analysis
… is required in the first phase. With the help of active seismic methods high-resolution images of the geothermal reservoir can be delivered. This allows potential transport routes for fluids to be identified as well as regions with high potential of heat extraction to be mapped, which indicates …
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INTEGRATING GEOPHYSICAL METHODS TO STUDY SUBDUCTION ZONE PROPERTIES, ACTIVE FAULTING IN A VOLCANIC FIELD, AND VOLCANO LANDSLIDE HAZARDS
… trench to the volcanic arc. Specifically, I use seismic reflection data, earthquake focal mechanisms, magnetics, and electromagnetics to study three actively deforming regions: 1) the Cascadia subduction zone deformation front in the Pacific NW of the United States, 2) the near surface of the …
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Structural modelling and earthquake analysis of a hospital building located within the Tjörnes fracture zone in Iceland
… Tjörnes fracture zone(TFZ)is one of the two most active seismic regions in Iceland. It is of vital importance for civil protection and security of the local residents living in that area to have a fully functioning hospital close by, when a major earthquake event occurs within the TFZ. The main …
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Elastic time-reverse imaging and transmission tomography for microseismic and DAS VSP data
… used for subsurface geological characterization. Seismic tomography produces accurate velocity models that commonly serve as input into seismic migration algorithms that produce high-quality passive-source (e.g., microseismic) images or structural images of geological interfaces constructed using …
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Imaging subduction zones: slab structure, fluids, and fault slip
… address this gap, this thesis uses passive and active seismic imaging to derive 2-D and 3-D structural models of the Alaska Peninsula and Cascadia subduction zones. These structural observations are directly linked to the process of fluid storage and release using rock physics models, with …
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The Mechanisms and Triggering of Earthquakes in the Ridge-Transform Environment
… difficult. Recent advances in research vessels, seismic data acquisition techniques, and equipment built to withstand the temperatures and pressures within the oceans and on the seafloor, have made a huge impact in helping us understand the complicated structure and dynamics of our Earth. In the …
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Seismicity and structure of the eastern Gawler Craton and Lake Eyre region
… region is associated with pronounced intraplate seismic activity and thick sedimentary cover that potentially obscures the elusive boundary between older Proterozoic and younger Phanerozoic eastern Australia. Despite this, the area had limited seismic data coverage due to its remoteness and the …
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Seismicity and structure of the eastern Gawler Craton and Lake Eyre region
… region is associated with pronounced intraplate seismic activity and thick sedimentary cover that potentially obscures the elusive boundary between older Proterozoic and younger Phanerozoic eastern Australia. Despite this, the area had limited seismic data coverage due to its remoteness and the …
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Source studies over a wide range in earthquake magnitude
… comer of Hokkaido Island, Japan. Within this active seismic region, over 11,100 events ranging in magnitude from 0 to 7.1 were cataloged by the Hokkaido University network in the period 1976-1986 with epicentral distances of less than 50 km from the Carnegie broadband station KMU. Two subsets …
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Catastrophic Tsunamis In the Indonesian Archipelago
… that meet and collide, and producing highly active seismic zone that is mostly located under the sea. The ‘tsunami season’ within this region started in 1992 at Hading Bay, Flores Island, with casualties of more than 2000 people, followed almost every two years with the 1994 East Java …