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 10 of 10 for “"earthquake location"”.
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Studies on earthquake location and source determination using coda waves
… and focus on early onset body waves to model earthquake location and source properties. A recent technique known as coda wave interferometry utilises the cross correlation of coda waves to constrain changes in source properties between earthquake pairs. This thesis focuses on extending coda …
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Studies on earthquake location and source determination using coda waves
… and focus on early onset body waves to model earthquake location and source properties. A recent technique known as coda wave interferometry utilises the cross correlation of coda waves to constrain changes in source properties between earthquake pairs. This thesis focuses on extending coda …
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Earthquake location using a 3D velocity model : an example in Sichuan Province, China
… velocity models to seismic event location. We develop a technique for three-dimensional seismic event location, utilizing a finite difference method for travel time calculation and a grid search method for location. We apply this technique to the location of three events in Sichuan …
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Time Reversed Acoustics and applications to earthquake location and salt dome flank imaging
… TRA enables us to locate the source, such as an earthquake, inside a medium. The causal domain allows us to create a new datum through the TRA-based redatuming operators and then image the subsurface structures. The source location application directly uses the retro-focusing feature of the TRA …
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Active tectonics and earthquake hazards in continental mountain ranges and foreland basins
… active mountain belts are exposed to significant earthquake hazard, since the range-bounding faults produce large earthquakes, and the underlying geological structure amplifies the resulting ground shaking. The aim of this dissertation is to investigate the regional-scale controls on earthquake …
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P- and S- wave tomography of the crust and uppermost mantle in China and surrounding areas
… controlled and smooth transitions among adjacent locations are guaranteed in the final models. To achieve these objectives, the Monte-Carlo (random search) method and the Gauss-Newton method are applied iteratively to find the nonlinear least square solutions and to optimize the models in the …
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High resolution determination of the Benioff zone geometry beneath southern Peru
… data from a local seismic network. Various earthquake location algorithms a re-tested by comparing the locational estimates and error statistics produced by each, to determine if any one method produces solutions which are more stable than the others. No significant differences were found …
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Relocation of Eastern Tennessee Earthquakes Using hypoDD
The double difference earthquake location algorithm, implemented in the program HYPODD, was used to relocate a data set of approximately 1000 earthquakes in the eastern Tennessee seismic zone (ETSZ), using a recently developed velocity model. The double difference algorithm is used to calculate …
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Automated seismic event location by waveform coherence analysis
Automated location of seismic events is a very important task in microseismic monitoring operations as well for local and regional seismic monitoring. Since microseismic records are generally characterised by low signal-to-noise ratio, such methods are requested to be noise robust and sufficiently …
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Double-Difference Seismic Event Relocation: A Study of the Applications and Limitations of the Relocation Problem
Earthquake relocation provides refined earthquake catalogs based on additional considerations or data beyond the initial earthquake location estimates. Double-difference relocation, in particular, utilizes the assumption that ray paths in close proximity to one another will pass through a similar …