UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a given thesis/dissertation in DRUM.

More information is available at Theses and Dissertations at University of Maryland Libraries.

Browse

Filters

2019 - 201912020 - 20221

Settings

Subject: search.filters.subject.InSAR

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    ASSESSING FAULT SLIP HAZARD IN TAIWAN USING SPACE GEODESY
    (2022) Robbins, Kathryn Rose; Huang, Mong-Han; Geology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Taiwan is a geologically complex region due to the continuous collision of the Eurasian Plate and the Philippine Sea Plate. This study aimed to quantify the interseismic crustal deformation of Taiwan and detail the island’s seismic hazard potential using space geodesy. Data were collected between 2016 and 2021 through C-band Copernicus Sentinel-1 synthetic aperture radar imagery and continuous GNSS data from Academia Sinica, Taiwan. I excluded major earthquake events within this time period and generated a dataset consisting of interferometric synthetic aperture radar ground motion velocities with GNSS corrections and interpolated GNSS ground motion velocities. Then, utilizing this dataset, I performed a deformation rate analysis and error analysis. Next, I explored block modeling and used a total variation regularization approach to determine the reference block model that best reduced velocity residuals and minimized the number of independently rotating blocks. Results suggested that the Taipei Basin, Ilan Basin, Western Foothills, and Longitudinal Valley were experiencing increased total strain rate accumulation and, therefore, posed increased seismic hazard.
  • Thumbnail Image
    Item
    APPLYING GEODESY TO MODEL POSTSEISMIC SLIP OF THE 2016 MW 6.4 MEINONG EARTHQUAKE
    (2019) Butcher, Rebecca; Huang, Mong-Han; Geology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    In regions of rapid convergence such as southwest Taiwan, unmapped active structures at multiple depths increase the uncertainty of seismic hazard estimates. The 2016 Mw 6.4 MeiNong earthquake occurred below the main Taiwan detachment, and may have illuminated some preexisting, but undocumented, fault structures. In this study, I use geodetic measurements to constrain afterslip on the main fault for 15 months following the MeiNong earthquake. The inverted afterslip is concentrated around the peak coseismic slip asperity without significant aftershock correlation, which implies heterogeneous frictional properties on the fault. Additionally, slip model misfit indicates shallower faults that are critically stressed before the earthquake creep due to the MeiNong coseismic stress. My results can help identify active faults located at shallower depth as well as their seismic potential in southwest Taiwan.