Fault Trace Mapping and Suface-Fault-Rupture Special Study Zone Delineation of Quaternary-Active Faults in Central Utah, Garfield, Juab, Millard, Piute, Sanpete, and Sevier Counties (RI-293)
by Adam I. Hiscock, Tyler R. Knudsen, and Rachel N. Adam
Summary
This study investigates the many active faults that pose a significant earthquake hazard to the growing Sevier Valley area in central Utah. Airborne light detection and ranging (lidar) elevation data were used to create high-resolution topographic images and a complete update of surface fault mapping.
The report deliniates special-study zone recommendations around updated fault traces, identifying areas prone to future surface rupture and related risks such as ground cracking or tilting. The fault geometries, attributes, and special-study zones are included as a GIS database, and were simultaneously published in the Utah Geologic Hazards Portal web mapping application.
This comprehensive report is a vital tool for developers, planners, and residents to reduce the risks associated with surface fault rupture.