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Survey Notes is an informative, non-technical magazine on noteworthy and interesting geologic topics in Utah. It is the official Utah Geological Survey newsletter and is produced three times a year. Regular columns include the Director's Perspective, Glad You Asked, GeoSights, Teacher's Corner, Energy News, Survey News, Core Center News, and New Publications. Published as Quarterly Review (1967-1975) and Survey Notes (1976- ). Articles in this issue include: 1) Director's Perspective, by Bill Keach; 2) Mapping Geologic Hazards in and Near Bryce Canyon National Park, by Tyler Knudsen; 3) Digging Up Evidence of Past Earthquakes in Salt Lake Valley, by Adam I. Hiscock, Emily J. Kleber, Michael D. Hylland, and Greg N. McDonald; 4) Groundwater and Wetland News: In-Lieu Fee Wetland Mitigation: A Boring Name For an Exciting Idea, by Becka Downard and Diane Menuz; 5) Glad You Asked: What do Landslides, Glaciers and Faults Have to Do with the Lakes on the Wasatch Plateau?, by Lance Weaver; 6) GeoSights: Springhill Geologic Park Davis County, Utah, by Mark Milligan; and 7) Energy News: Utah Returns to Being a Net Energy Importer, by Michael D. Vanden Berg.

Survey Notes is an informative, non-technical magazine on noteworthy and interesting geologic topics in Utah. It is the official Utah Geological Survey newsletter and is produced three times a year. Regular columns include the Director's Perspective, Glad You Asked, GeoSights, Teacher's Corner, Energy News, Survey News, Core Center News, and New Publications. Published as Quarterly Review (1967-1975) and Survey Notes (1976- ). Articles in this issue include: 1) Director's Perspective, by Bill Keach; 2) The Utah Flux Network: A Hydrometeorological Network Maintained by the Utah Geological Survey, by Paul Inkenbrandt and Kathryn Ladig.; 3) New, Novel, and Updated! Wetland Mapping Improves Across Utah, by Peter Goodwin; 4) Hazard News: Putting Down Roots in Utah's Earthquake Country Second Edition Provides Updated and New Information, by Emily Kleber, John Good, Adam Hiscock, and Steve Bowman; 5) Glad You Asked: What are the Oldest Rocks in Utah?, by Stephanie Carney; and 6) GeoSights: Trek to Fremont Island (Disappointment Island), by Torri Duncan.

Survey Notes is an informative, non-technical magazine on noteworthy and interesting geologic topics in Utah. It is the official Utah Geological Survey newsletter and is produced three times a year. Regular columns include the Director's Perspective, Glad You Asked, GeoSights, Teacher's Corner, Energy News, Survey News, Core Center News, and New Publications. Published as Quarterly Review (1967-1975) and Survey Notes (1976- ). Articles in this issue include: 1) Director's Perspective by Bill Keach; 2) Incorporating Small Unmanned Aircraft System (sUAS) Technology in Geologic Hazard Characterization and Emergency Response: Zion National Park, by Ben A. Erickson, Jessica J. Castleton, and Adam I. Hiscock; 3) The New Utah Aerial Imagery Database: A Statewide Resource of Historical Aerial and Related Imagery, by Steve D. Bowman; 4) Energy News: Critical Minerals: Reshaping the Minerals Industry, by Stephanie E. Mills; 5) Glad You Asked: What Movies Feature Utah Geology?, by Mackenzie Cope; and 6) GeoSights: Microbialites of Bridger Bay, Antelope Island, Great Salt Lake, by Stephanie Carney and Michael D. Vanden Berg.

We excavated trenches at two paleoseismic sites bounding a trans-basin bedrock ridge (the Willow Creek Hills) along the northern Lost River fault zone to explore the uniqueness of the 1983 Mw 6.9 Borah Peak earthquake compared to its prehistoric predecessors. At the Sheep Creek site on the southernmost Warm Springs section, two earthquakes occurred at 9.8–14.0 ka (95% confidence) and 6.5–7.1 ka; each had ~1.9 m of vertical displacement. About 4 km to the southeast, across the Willow Creek Hills, two ruptures at the Arentson Gulch site on the northernmost Thousand Springs section occurred at 9.0–14.7 ka and 6.1–7.5 ka with ~1.9 m of vertical displacement each. We synthesize these and previous paleoseismic results into a model of five postglacial (<15 ka) ruptures along a ~65 km reach of the northern Lost River fault zone. Our results show that the Borah Peak earthquake (34 km; 0.9 m mean displacement) was unique compared to previous ruptures that had both longer and shorter rupture lengths (~25–38 km), more displacement (mean of ~1.3–1.4 m), and equal or greater magnitude (Mw 6.9–7.1) than that in the 1983 earthquake. These ruptures support a hypothesis of variable rupture length and displacement on the northern Lost River fault zone and show that predecessors to the 1983 rupture have passed unimpeded through the Willow Creek Hills. Our work demonstrates that normal faults are capable of producing variable spatial-temporal patterns of rupture that, together with comparisons of fault geometry and historical rupture length, improve our understanding of fault segmentation and help inform models of earthquake rupture probability.

Survey Notes is an informative, non-technical magazine on noteworthy and interesting geologic topics in Utah. It is the official Utah Geological Survey newsletter and is produced three times a year. Regular columns include Glad You Asked, GeoSights, Teacher's Corner, Energy News, Survey News, Core Center News, and New Publications. Published as Quarterly Review (1967-1975) and Survey Notes (1976- ). Articles in this issue include: 1) The Curious Spring Creek Road Landslide, by Ben Erickson; 2) Investigating Earthquake Hazard on the Southern Wasatch Fault Zone, by Adam I. Hiscock, Greg N. McDonald, and Michael D. Hylland; 3) Core Center News: Why a Building Full of Rocks is So Important to Utah, by Michael D. Vanden Berg; 4) Glad You Asked! What are Ice Caves?, by Jim Davis; 5) New Geochronology Database — A Wealth of Dating Information for Utah Soail and Rock, by Steve D. Bowman; 6) GeoSights: Hole-in-the-Ground, Snake Valley, Millard County, Utah, by Mark Milligan; and 7) Survey News.