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 “"Earthquake activity"”.
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The significance of seismic hazard on structural design in Zambia
… risk posed by seismicity on structures, and no earthquake design and construction guides exist. The recent earthquake occurrences suggest that earthquake incidences can no longer be ignored. The research studied the occurrence and significance of earthquakes on the design of structures in …
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Crustal modification by tectonic events and upper mantle anisotropy beneath the Midcontinent Rift and New Madrid Seismic Zone: insights from receiver function studies and teleseismic shear wave splitting
… modified by tectonic processes such as rifting, earthquake activity. In this dissertation, shear wave splitting and receiver function techniques were employed to study the extent of crustal and upper mantle modifications beneath the New Madrid Seismic Zone (NMSZ) and the Midcontinent Rift (MCR). …
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Analysis and interpretation of compressional (P-wave) and shear (SH-wave) reflection seismic and geologic data over the Bane Dome, Giles County, Virginia
… by the present stress regime, causing earthquake activity in this area. Interpretation of the seismic data supports a duplex structure proposed for the Paleozoic rocks of the Bane Dome Complex within the Narrows thrust sheet of southwestern Virginia.
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Development of gis database for hayward fault
Earthquake activity and its attendant effects on the earth surface have been a major concern for some time now, especially considering their negative effects in loss of human life, property damage including the emotional impact on witnesses. This study focuses on the Hayward Fault, located in the …
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Injection Induced Seismicity Modeling and Application to the Karapiti Reinjection Area, Wairakei, New Zealand
… between thermo-hydro-mechanical behaviours and earthquake rupture process in injection induced earthquake areas with a coupled numerical model. The physics based numerical modelling specially designed for injection induced seismicity integrates fluid flow, heat transfer, mechanical deformation …
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Remote Sensing of 21st Century Water Stress for Hazard Monitoring in California
… the regional stress field, which may influence earthquake activity. Both the elastic and poroelastic deformation responses can be observed using satellite-based geodetic tools including Global Navigation Satellite System (GNSS) station displacements and Interferometric Synthetic Aperture Radar …
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Crustal Stress Heterogeneity in the Vicinity of a Geothermal Field: Coso Geothermal Field, CA
… distribution and (3) in a manner consistent with earthquakes causing the stress rotations. While the vertically averaged Shmin orientation for the three eastern boreholes varied by as little as 1°, the spectral slopes varied by 0.4 log (deg2 *m)(m) from the inside to the margin unproduced areas of …
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Hydraulic-fracturing induced seismicity in Alberta, Canada: Analysis and interpretation using dense local arrays
… gas development is associated with anthropogenic earthquake activity worldwide. In particular, hydraulic fracturing, which involves the injection of high-pressure fluids into the subsurface, has been observed to trigger induced seismicity in some areas. The Duvernay Formation in Alberta is a …
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Monitoring induced seismicity near the Wellington oil field, South-Central Kansas
… pore fluid pressure increases are inducing the earthquakes. In this investigation, I examine earthquake occurrence in southern Kansas and northern Oklahoma and its relation to the change in pore pressure. The main source of data comes from the Wellington Array in the Wellington oil field, in …
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Fracture mechanics of volcanic eruptions
… and accompanied by an increase in local seismic activity, driven by fracturing within the edifice. For closed systems, with a repose interval of the order of a century or more, this fracturing must occur in order to create a pathway for the magma to reach the surface. Time-to-failure forecasting …
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Seismicity of the Bath County, Virginia locale
… August of 1982 and failed to detect any local earthquake activity. Network monitoring by a permanent 4 station microearthquake network from November 1978 to November 1982 resulted in 11 recorded events. Three of these events were too small to be located. The other 8 events were located using …
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A comparison of proxies for seismic site conditions and amplification for the large urban area of Santiago de Chile
… than six million inhabitants, faces tremendous earthquake hazard. Macroseismic data for the 1985 Valparaiso and the 2010 Maule events show large variations in the distribution of damage to buildings within short distances indicating strong influence of local sediments and the shape of the …
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Lateglacial to Holocene climatic and environmental changes in Europe : multi-proxy studies on lake sediments along a transect from northern Italy to northeastern Poland
… Italy) was studied to shed light on regional earthquake activity and the influence of climate variability and anthropogenic impact on catchment erosion and detrital flux into the lake. Frequent small-scale detrital layers within the sediments reflect allochthonous sediment supply by extreme …
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Subduction zone wave guides : deciphering slab structure using intraslab seismicity at the Chile-Peru subduction zone
Subduction zones are regions of intense earthquake activity up to great depth. Sources are located inside the subducting lithosphere and, as a consequence, seismic radiation from subduction zone earthquakes is strongly affected by the interior slab structure. The wave field of these intraslab …
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GPS Imaging of Vertical Land Motion and Earthquake Coseismic Displacements in the GPS Mega-Network
… signals related to vertical land motion and earthquake deformation. Two studies examine vertical land motion trends in regions of the United States and try to pinpoint the underlying geological sources for their signals. In the first study, GPS Imaging is used to identify the scope and extent …
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Crustal structure and tectonics of Borneo and Sulawesi: results from receiver function analysis and virtual deep seismic sounding
… Sea plate. It has hosted one of the largest earthquakes ever recorded (Mw 9.2 Sumatra-Andaman earthquake in 2004) and perhaps the most famous volcanic eruption in history (Krakatoa eruption of 1883), which profoundly affected the Earth’s climate. While the western Pacific margin and …