Document Type


Date of Degree Completion

Fall 2005

Degree Name

Master of Science (MS)


Geological Sciences

Committee Chair

Timothy Ian Melbourne

Second Committee Member

M. Meghan Miller

Third Committee Member

Jeffrey Lee


Transient surface deformation has been observed by continuously operating Global Positioning System stations in the Puget Sound area during the past decade. This surface deformation is associated with processes occurring on or near the subducting plate boundary between the Juan de Fuca and North American plates. This thesis is composed of two studies of transient deformation along the Cascadia plate margin and a discussion of the methodologies employed in these studies. We model one 7-week episode of transient deformation that occurred during 2003 beneath the Puget Sound area. Additionally, we utilize a combination of continuous Global Positioning System and seismic data to provide evidence for the occurrence of transient deformation in southern Cascadia. The remainder of the thesis focuses on the methodologies utilized in both identifying and modeling these episodes of transient deformation.