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dc.contributor.advisorPeng, Zhigang
dc.contributor.advisorNewman, Andrew
dc.contributor.advisorDufek, Josef
dc.contributor.advisorHuber, Christian
dc.contributor.advisorDovrolis, Constantine
dc.contributor.authorAiken, Chastity
dc.date.accessioned2016-08-22T12:19:50Z
dc.date.available2016-08-22T12:19:50Z
dc.date.created2015-08
dc.date.issued2015-05-07
dc.date.submittedAugust 2015
dc.identifier.urihttp://hdl.handle.net/1853/55493
dc.description.abstractDynamic triggering of earthquakes is investigated and compared among three geothermal/volcanic regions of California, and dynamic triggering of tremor is investigated and compared among several strike-slip faults in the Western Hemisphere. The characteristics of the triggering waves - amplitude, frequency, and incidence of the triggering waves on faults – are explored. Results indicate that for earthquake triggering, peak dynamic stress (amplitude) appears to be the primary controlling factor. On the other hand, tremor triggering is controlled by amplitude, frequency, and incidence of the seismic waves on the fault. In addition, earthquake triggering primarily occurs in geothermal regions with extensional tectonics, while tremor triggering occurs predominately in compressional or transpressional tectonic environments. A geothermal region’s susceptibility to triggering by external stressing is found to be proportional to its background activity rate. However, tremor triggering appears to occur more often than earthquake triggering. The observation that tremor is triggered more often than earthquakes could be a reflection of a fault being weaker at depth (where tremor occurs) than in the shallower crust (where earthquakes occur). That is, tremor may be more easily triggered due to a fault having low effective stress, pressurized fluids, and/or a perpetual state of near-criticality at depths where tremor occurs. Potential research directions that further explore dynamic triggering of earthquakes and tremor are discussed.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectearthquake
dc.subjecttremor
dc.subjecttriggering
dc.subjectgeothermal
dc.subjectstrike-slip
dc.titleTriggered earthquakes and tremor: Their characteristics and physical mechanisms
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentEarth and Atmospheric Sciences
thesis.degree.levelDoctoral
dc.date.updated2016-08-22T12:19:50Z


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