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Full-Text Articles in Geophysics and Seismology
Characterizing Seismicity In Alberta For Induced-Seismicity Applications, Luqi Cui
Characterizing Seismicity In Alberta For Induced-Seismicity Applications, Luqi Cui
Electronic Thesis and Dissertation Repository
This report documents the compilation of a high-quality catalog of earthquakes in Alberta and the surrounding region: the Composite Alberta Seismicity Catalog (CASC). It currently includes events through July 2015. The catalog and its documentation are available for download at www.inducedseismicity.ca. For the determination of the magnitude of completeness (Mc) of the catalog, we map Mc (xi, yi, t) across a grid of the region, where xi and yi represent the longitude and latitude of center nodes in the grid and t indicates time period. The empirical …
Strength Study Of Zircon Under High Pressure, Ievgeniia Morozova
Strength Study Of Zircon Under High Pressure, Ievgeniia Morozova
Electronic Thesis and Dissertation Repository
Zircon (ZrSiO4) is a strong accessory mineral that can retain U, Th and Hf within its structure. This makes zircon an important material in geochemical and geochronological studies. In addition, the strong thermal shock resistance of zircon allows for dating the formations of melt and impact events and to separate shocked and potentially shocked country rocks. However, the deformation mechanism and microstructure behavior of zircon at high pressure is poorly understood. Therefore, this work aims to study the deformation and texture of zircon in situ at high pressure and room temperature, and also to examine the microstructure of …
Regionally-Adjustable Generic Ground-Motion Prediction Equation, Emrah Yenier
Regionally-Adjustable Generic Ground-Motion Prediction Equation, Emrah Yenier
Electronic Thesis and Dissertation Repository
We develop a simulation-based generic ground-motion prediction equation (GMPE) that can be adjusted for use in any region by simple modifications to its key modeling parameters.
First, we determine how to treat ground-motion saturation effects observed at close distances to large magnitude earthquakes in a point-source sense. We model the source and attenuation attributes of well-recorded M ≥ 6 events, considering ground motions originate from an equivalent point source placed at an overall effective distance such that the empirically-observed saturation effects are successfully reproduced. We investigate the trade-offs between source and attenuation modeling parameters through analysis of Fourier amplitudes for …