Group A, Poster #089, Earthquake Geology
Quantifying relationships between fault parameters and surface deformation associated with thrust and reverse fault earthquakes: A distinct element approach
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Poster Presentation
2024 SCEC Annual Meeting, Poster #089, SCEC Contribution #13505 VIEW PDF
ge of scarp behaviors, including monoclinal, pressure ridge, and simple scarps – each of which can be modified by hanging wall collapse. The fault displacement (i.e., anticipated earthquake magnitude), fault dip, sediment depth, and sediment strength have the most influence on resultant surface rupture patterns. The DEM results comprehensively describe the range of historic surface rupture observations in the Fault Displacement Hazards Initiative (FDHI) dataset. We develop relationships of observed (FDHI) and anticipated (DEM model) surface ruptures by incorporating additional information about the earthquake size, fault geometry, and surface deformation style. Furthermore, we extend these 2D DEM models into 3D to evaluate the influence of model parameters on along-strike variability, including changing the fault dip along strike and adding obliquity. We suggest that this DEM dataset can be used to supplement field data and help forecast patterns of ground surface deformation in future earthquakes given specific anticipated source and site characteristics.
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