Detailed Mapping of the East and West Cache Fault Zones, Utah - Using New High-Resolution Lidar Data to Reduce Earthquake Risk
Original PDF File |
1.5 MB | Download |
View directly in browser |
1.5 MB | View in browser |
Alternative files | ||
Plate 1 - Clarkston QuadrangleSurface Fault Rupture Hazard Map of the Clarkston Quadrangle, Box Elder and Cache Counties, Utah and Franklin and Oneida Counties, Idaho |
32.9 MB | Download |
View in browser | ||
Plate 10 - Naomi PeakSurface Fault Rupture Hazard Map of the Naomi Peak Quadrangle, Cache County, Utah, and Franklin County, Idaho |
46.1 MB | Download |
View in browser | ||
Plate 11 - Smithfield QuadrangleSurface Fault Rupture Hazard Map of the Smithfield Quadrangle, Cache County, Utah |
27.5 MB | Download |
View in browser | ||
Plate 12 - Logan QuadrangleSurface Fault Rupture Hazard Map of the Logan Quadrangle, Cache County, Utah |
31.7 MB | Download |
View in browser | ||
Plate 13 - Paradise QuadrangleSurface Fault Rupture Hazard Map of the Paradise Quadrangle, Cache County, Utah |
33.1 MB | Download |
View in browser | ||
Plate 14 - James Peak QuadrangleSurface Fault Rupture Hazard Map of the James Peak Quadrangle, Cache County, Utah |
38.0 MB | Download |
View in browser | ||
Plate 2 - Trenton QuadrangleSurface Fault Rupture Hazard Map of the Trenton Quadrangle, Cache County, Utah, and Franklin County, Idaho |
21.7 MB | Download |
View in browser | ||
Plate 3 - Cutler Dam QuadrangleSurface Fault Rupture Hazard Map of the Cutler Dam Quadrangle, Box Elder and Cache Counties, Utah |
33.1 MB | Download |
View in browser | ||
Plate 4 - Newton QuadrangleSurface Fault Rupture Hazard Map of the Newton Quadrangle, Cache County, Utah |
19.1 MB | Download |
View in browser | ||
Plate 5 - Honeyville QuadrangleSurface Fault Rupture Hazard Map of the Honeyville Quadrangle, Box Elder and Cache Counties, Utah |
38.6 MB | Download |
View in browser | ||
Plate 6 – Wellsville QuadrangleSurface Fault Rupture Hazard Map of the Wellsville Quadrangle, Cache County, Utah |
21.8 MB | Download |
View in browser | ||
Plate 7 – Mount Pisgah QuadrangleSurface Fault Rupture Hazard Map of the Mount Pisgah Quadrangle, Box Elder and Cache Counties, Utah |
35.1 MB | Download |
View in browser | ||
Plate 8 – Mantua QuadrangleSurface Fault Rupture Hazard Map of the Mantua Quadrangle, Box Elder, Cache, and Weber Counties, Utah |
41.4 MB | Download |
View in browser | ||
Plate 9 – Richmond QuadrangleSurface Fault Rupture Hazard Map of the Richmond Quadrangle, Cache County, Utah, and Franklin County, Idaho |
23.2 MB | Download |
View in browser |
Resource ID
65316
Resource Type
Document
Availability
Public
Hazard Type
Earthquake, Surface Fault Rupture
UGS Program
Hazards
Title
Detailed Mapping of the East and West Cache Fault Zones, Utah - Using New High-Resolution Lidar Data to Reduce Earthquake Risk
Author
Adam I. Hiscock, Emily J. Kleber, Greg N. McDonald, Steve D. Bowman
Publisher
Utah Geological Survey
Date
September 29 2020
Publication Identification
Award G17AP00071, UGS Contract Deliverable to the U.S. Geological Survey
County
Cache
State
Utah
Keywords
earthquake, surface fault rupture
Document Type
Report
Original Filename
G17AP00071_FTR.pdf
Abstract / Description
The Cache Valley region in northern Utah and southern Idaho contains and is surrounded by several large, hazardous fault zones which pose a significant earthquake risk. The 62-km-long East Cache fault zone (ECFZ) and the 80-km-long West Cache fault zone (WCFZ) bound the Cache Valley graben and both show evidence of large surface-faulting earthquakes in late Quaternary time. Other hazardous faults in the Cache Valley region include the intrabasin Dayton fault, which runs along the east side of Little Mountain and Bergeson Hill in northern Cache Valley, and the James Peak fault at the very southern end of the ECFZ. Additionally, the Wasatch fault zone (WFZ) to the west is also capable of generating large surface-rupturing earthquakes. This region is a rapidly growing area of northern Utah, with development spreading along the margins of the valley and encroaching on these hazardous fault zones. As part of this project, airborne light detection and ranging (lidar) elevation data was collected in the Cache Valley area to supplement existing data. High-resolution topographic data derived from this newly acquired lidar data has allowed for detailed mapping of surface traces of the ECFZ and WCFZ. Previously, the surface location and extent of fault traces associated with these fault zones were not well understood in many areas, owing to limited aerial photography coverage, heavy vegetation near range fronts, and the difficulty in recognizing moderate (<1 m) displacements in the field or on aerial photographs. Previous geologic mapping, paleoseismic investigations, historical aerial photography, and field investigations were also used to identify and map surface fault traces and infer fault locations. Special-study areas were delineated around fault traces to facilitate understanding of the surface-rupturing hazard and associated risk. Defining these special-study zones encourages the creation and implementation of municipal and county geologic-hazard ordinances dealing with hazardous faults. We identified potential paleoseismic investigation sites where fault scarps appear relatively pristine, are located in geologically favorable settings, and where additional earthquake timing data would be beneficial to earthquake research of the ECFZ and WCFZ. This work is critical to raise awareness of earthquake hazards in areas of Utah experiencing rapid growth. In addition, our investigation makes high-resolution lidar data available for use by researchers, local governments, and others.
Marker lat / long: 41.846139, -111.924759 (WGS84)