2016 Utah Earthquake Working Group Meetings Utah Quaternary Fault .
2016 UTAH EARTHQUAKE WORKING GROUP MEETINGSUTAH QUATERNARY FAULT PARAMETERS WORKING GROUPSUMMARYWednesday, February 10, 2016Utah Department of Natural Resources Building, Room 20001594 West North Temple, Salt Lake City, UtahWELCOME AND INTRODUCTIONSteve Bowman (Utah Geological Survey [UGS]) called the 2016 Utah Quaternary FaultParameters Working Group (UQFPWG) meeting to order at 8:15 a.m. After welcoming Working Groupmembers and guests, Steve summarized the UQFPWG’s past activities and outlined the Working Group’spurpose and goals for the future.UQFPWG Purpose and Goals One of three standing committees created to help set and coordinate Utah’s earthquake-hazardresearch agenda. Reviews ongoing paleoseismic research in Utah, and updates the Utah consensus slip-rate andrecurrence-interval database as necessary. Provides advice/insight regarding technical issues related to fault behavior in Utah and the Basinand Range Province. Identifies and prioritizes future Utah Quaternary fault paleoseismic investigations.TECHNICAL PRESENTATIONSThe following presentations were made on current paleoseismic research and related activities inUtah, most presentations are available at rameters/. Active Faulting, Soil and Rock Type, and Groundwater Elevations Beneath Salt Lake City – Vp,Vs, and Reflection Images from a Seismic Land Streamer System: Lee Liberty, Boise StateUniversity Late Holocene Earthquake Record at the Corner Canyon Site on the Salt Lake City Segment ofthe Wasatch Fault Zone: Chris DuRoss, U.S. Geological Survey (USGS) Preliminary Results from the Airport East Trench Site, Taylorsville Fault, West Valley FaultZone: Adam Hiscock, UGS New Insight into the Paleocene Cedar City-Parowan Monocline: Bob Biek, UGS Field Investigations of Active Faulting in the Sevier Desert Region – Methods and PreliminaryResults: Tim Stahl, University of Michigan, National Science Foundation Post-DoctoralResearcher1
Revisiting Utah Quaternary Faults – East Canyon, Moab, Joes Valley, and Wasatch Fault ZoneSegment Boundaries: Jim McCalpin, GEO-HAZ Consulting, Inc. Updated Utah Geological Survey Surface-Fault-Rupture and Other Geologic-HazardInvestigation and Report Guidelines: William Lund, UGS, Emeritus Characterization of Segmentation and Long-Term Slip Rates of Wasatch Front Fault Systems,Utah: Julia Howe, University of Utah, Graduate Student Utah Quaternary Fault and Fold Database Status of Updates and New Web Application: MikeHylland, UGS New Utah Earthquake and Quaternary Fault Map: Steve Bowman, UGS Paleoseismic Investigation within the Traverse Ridge Segment Boundary ‒ Initial Plans forSummer 2016 Field Work: Nathan Toke, Utah Valley University (UVU) Pots Creek and Diamond Gulch Faults in Northeast Utah ‒ A Preliminary Evaluation: JoannaRedwine and Lucy Piety, U.S. Bureau of Reclamation The Great Salt Lake Fault and Its Microbial Mounds: Susanne Janecke, Utah State University(USU) UAV-Survey and Photogrammetry Produce LiDAR-Like DEM of Scarps in Logan, Utah:Susanne Janecke, USU, and Michael Bunds, Jeremy Andreini, and Jack Wells, UVU New Data on Holocene Offsets and Slip Rates for the Oquirrh Fault from DEMs Made withStructure-from-Motion Methods: Michael Bunds, Jeremy Andreini, Michael Arnold, KennethLarsen, Andrew Fletcher,and Nathan Toke, UVU Update on the Working Group on Utah Earthquake Probabilities (WGUEP) Report, DataDeveloped, and Outreach: Ivan Wong, AECOM (WGUEP Chair) Basin and Range Province Seismic Hazard Summit III Summary: William Lund and SteveBowman, UGSTECHNICAL DISCUSSION ITEMSNo technical discussion items came before the Working Group at this year’s meeting.UQFPWG 2017 FAULT INVESTIGATION PRIORITIESIn 2005, the UQFPWG recommended that 20 Quaternary faults/fault segments in Utah beinvestigated to “adequately characterize Utah’s earthquake hazard to a minimally acceptable level”(Lund, 2005). Since then, the Working Group has added an additional 11 faults/fault segments to the list:five in 2007, one in 2009, one in 2010, four in 2011, and three general recommendations regarding thefive central segments of the Wasatch fault zone, fault zone mapping, and acquisition of high resolutionimagery in 2012, 2014, 2015, respectively. A new priority to investigate the relation of salt tectonics to2
some Utah Quaternary faults (for example, the Joes Valley fault zone, Gunnison fault, and the Levansegment of the Wasatch fault zone) was added this year (see table 1 below).Table 2 lists faults and fault segments in the USGS National Seismic Hazard Maps or the UGSHazus Utah fault database (Lund, 2014) not listed in table 1 that may warrant additional investigation.Figure 1 shows the faults and fault segments listed in tables 1 and 2. Table 3 lists the current status ofpaleoseismic investigations for Utah priority faults and fault segments identified by the UQFPWG aspriorities for investigation. Note that faults or fault segments listed in table 3 as having received somelevel of paleoseismic investigation does not imply that all of the paleoseismic data necessary to fullycharacterize those faults or fault segments has been acquired; further investigation of those structures maybe necessary.The UQFPWG conducts an annual review of progress made toward investigating the faults/faultsegments on the priority list. Based on that review, the Working Group establishes a short list of thehighest priority faults and fault segments for future investigation. The list of highest priority faults andfault segments is published on the UGS website s/utahearthquake-working-groups/), which is then referenced by the USGS Earthquake Hazards Program intheir annual External Research Support (National Earthquake Hazards Reduction Program [NEHRP])request for proposals.The Working Group’s highest priority list for 2017 includes (not in priority order):1. Acquire new paleoseismic information to address data gaps for (a) the five central segments ofthe Wasatch fault zone, (b) the northern segment of the Oquirrh fault zone, (c) refining the latestQuaternary earthquake chronology for the Topliff Hills fault, and (d) the East and West Cachefault zones. Examples of paleoseismic data to be acquired include surface rupture extent,earthquake timing, displacement, and fault geometry.2. Acquire earthquake timing information for the Utah Lake fault zone to investigate the relation ofearthquakes on that fault system to large earthquakes on the adjacent Provo segment of theWasatch fault zone (coseismic or independent rupture, fault pairs?).3. Use recently acquired LiDAR data to more accurately map the traces of the Wasatch, WestValley, and Hurricane fault zones, and search for and map previously undiscovered mid-valleyQuaternary faults.4. Acquire high-resolution aerial imagery (LiDAR, Structure from Motion, etc.), and map high-risk(chiefly urban) Utah hazardous faults to identify new paleoseismic trench sites.5. Acquire and analyze information on salt tectonics and its relation to the Main Canyon fault,Sevier detachment/Drum Mountains fault zone, Bear River fault zone, Spanish Valley (Moabarea), Joes Valley fault zone, Levan and Fayette segments of the Wasatch fault zone, ScipioValley faults, and the Gunnison fault.The Working Group’s other priority list for 2017 was modified by deleting the Cedar CityParowan monocline from priority 10, based on new geologic mapping of the structure by Bob Biek, UGS,and presented to the working group at this meeting. The other fault priorities were not changed.Table 4 shows the 2017 highest priority fault and fault segment recommendations, table 5 showsthe list of other priority faults and fault segment recommendations, and both tables show the currentinvestigation status for all faults and fault segments identified by the UQFPWG as requiring additional3
investigation. All of the faults/fault sections listed in table 2 remain priorities and should be consideredfor future investigation if a compelling case can be made for the need to acquire additional paleoseismicdata.WORKING GROUP PRODUCTSThe final agenda, speaker presentations, and this summary document are available on theUQFPWG web page at rameters/. Paleoseismic investigations that developed out of the UQFPWGmeetings and published by the UGS are available in the Paleoseismology of Utah series ation/paleoseismology-of-utah-series/. Most of theUSGS NEHRP funded investigations for Utah that were not published by the UGS are compiled in UGSMiscellaneous Publication 13-03 p13-03.pdf).Utah Quaternary Fault and Fold DatabaseThe UGS updated the Utah Quaternary Fault and Fold Database on July 1, 2015, incorporatingnew data and a complete review of previously published data through the end of 2013. Users of anyQuaternary fault trace and related data acquired from the UGS or the Utah Automated GeographicReference Center (AGRC) State Geographic Information Database (SGID) in the past are advised to usethe updated database available from the AGRC SGID d-via-sde/) as the SGID10.GEOSCIENCE.QuaternaryFaults feature class. This single, comprehensivefeature class will be periodically updated as new/updated data become available (anticipated several timesper year) and replaces the six previously available feature classes of variable completeness. A web mapapplication for the database is available at faults/.REFERENCESLund, W.R., 2005, Consensus preferred recurrence-interval and vertical slip-rate estimates – review ofUtah paleoseismic-trenching data by the Utah Quaternary Fault Parameters Working Group: UtahGeological Survey Bulletin 134, 109 p., online at -134.pdf.Lund, W.R., 2014, Hazus loss estimation software earthquake model revised Utah fault database, updatedthrough 2013: Utah Geological Survey Open-File Report 631, 11 p., online athttp://geology.utah.gov/online/ofr/ofr-631.pdf.4
MEETING ATTENDANCEWorking Group Members (* Speaker)Steve Bowman*Rich BriggsMichael Bunds*David DinterChris DuRoss*Ron HarrisAdam Hiscock*Michael Hylland*Susanne Janecke*William Lund*Jim PechmannSteve PersoniusJoanna Redwine*Nathan Toke*Ivan Wong*Utah Geological Survey (UQFPWG Chair)U.S. Geological Survey, Earthquake Hazards ProgramUtah Valley UniversityUniversity of Utah, Department of Geology & GeophysicsU.S. Geological Survey, Earthquake Hazards ProgramBrigham Young UniversityUtah Geological Survey (UQFPWG UGS Liaison)Utah Geological SurveyUtah State UniversityUtah Geological Survey, EmeritusUniversity of Utah Seismograph StationsU.S. Geological Survey, Earthquake Hazards ProgramU.S. Bureau of ReclamationUtah Valley UniversityAECOMGuests (* Speaker)Genevieve AtwoodDan AuberyGregg BeukelmanBob Biek*Ron BruhnNariah ChambersAnthony CroneSeth DeeBret DixonPeter DoumitRichard GiraudMichael HansenDoug HawkesDanny HornsJulia Howe*Paul JewellEmily KleberTyler KnudsenRich KoehlerElliott LipsBill LoughlinJim McCalpin*Greg McDonaldAdam McKeanBob OaksKris PankowDavid SimonTim Stahl *Chuck WilliamsonAna VargoEarth Science EducationUtah Division of Water ResourcesUtah Geological SurveyUtah Geological SurveyUniversity of Utah, Department of Geology & Geophysics, RetiredBrigham Young UniversityU.S. Geological Survey, RetiredNevada Bureau of Mines and GeologyUtah Division of Water RightsIntermountain GeoEnvironmental Services, Inc.Utah Geological SurveyRB&G Engineering, Inc.Applied Geotechnical Engineering Consultants, Inc.Utah Valley UniversityUniversity of Utah, Department of Geology & GeophysicsUniversity of Utah, Department of Geology & GeophysicsUtah Geological SurveyUtah Geological SurveyNevada Bureau of Mines and GeologyGreat Basin Earth ScienceLoughlin Water AssociatesGEO-HAZ Consulting, Inc.Utah Geological SurveyUtah Geological SurveyUtah State UniversityUniversity of Utah Seismograph StationsSimon AssociatesUniversity of MichiganUtah Division of Water RightsNatural Resources Conservation Service5
Table 1. List of Quaternary faults and fault segments identified by the UQFPWG as requiring additionalinvestigation to adequately characterize Utah’s earthquake hazard to a minimally acceptable level.Utah Fault or Fault SegmentUQFPWG ---Nephi segment, Wasatch fault zone2,3West Valley fault zone2,3Weber segment, Wasatch fault zone2,3 – most recent eventWeber segment, Wasatch fault zone2,3 – multiple eventsUtah Lake faults and folds3Great Salt Lake fault zone2,3Collinston and Clarkston Mountain segments, Wasatch fault zone3Sevier and Toroweap faults2,3Washington fault zone3 (includes Dutchman Draw fault2)Cedar City-Parowan monocline (removed 2016)3,4 and Paragonah fault2,3Enoch graben3East Cache fault zone2,3Clarkston fault2,3Wasatch Range back-valley faults (includes Morgan fault2 and Main Canyon fault3)Hurricane fault zone2,3Levan segment, Wasatch fault zone2,3Gunnison fault3Scipio Valley faults3Faults beneath Bear LakeEastern Bear Lake fault zone2,3Bear River fault zone2,3Brigham City segment, Wasatch fault zone2,3 – most recent eventCarrington fault, Great Salt Lake fault zone3Provo segment, Wasatch fault zone2,3 – penultimate eventRozelle section, East Great Salt Lake fault3Salt Lake City segment, Wasatch fault zone2,3 – northern partWarm Springs fault/East Bench fault2,3 subsurface geometry and connectionBrigham City segment, Wasatch fault zone2,3 rupture extent (north and south ends)Northern Provo segment, Wasatch fault zone2,3 – long-term earthquake recordTaylorsville fault, West Valley fault zone3Hansel Valley fault2,3Acquire new paleoseismic information to address data gaps for the five central segments of theWasatch fault zone.Improve the long-term earthquake record for Cache Valley (East1,2,3 and West Cache2,3 fault zones).Use recently acquired LiDAR data to more accurately map the traces of the Wasatch, West Valley,and Hurricane fault zones, and search for and map as appropriate previously undiscovered midvalley Quaternary faults.Acquire high resolution aerial imagery (LiDAR, Structure from Motion, etc.) and map high-risk(chiefly urban) Utah hazardous faults. Identify future paleoseismic trench sites.Acquire new paleoseismic information to address data gaps for the northern Oquirrh fault zone3.Acquire and analyze information on salt tectonics and its relation to the Main Canyon fault3, Sevierdetachment/Drum Mountains fault zone3, Bear River fault zone2,3, Spanish Valley (Moab area),Joes Valley fault zone2,3, Levan and Fayette segments2,3 of the Wasatch fault zone, Scipio Valleyfaults3, and the Gunnison fault3.Refine the latest Quaternary earthquake chronology for the Topliff Hills fault3.1 Original priorities from the 2005 UQFPWG meeting.2 Earthquake source on the USGS National Seismic Hazard Maps.3 Earthquake source listed in the UGS Hazus Utah fault database (UGS Open-File Report 631).4Fault removed from the list at the 2016 UQFPWG meeting, based on new information about the structure.6--2012--2013--2014--2015----2016
Table 2. Earthquake sources (faults and fault segments) in the USGS National Seismic Hazard Maps (NSHM) orthe UGS Hazus Utah fault database (UGS Open-File Report 631) not listed in table 1 and may warrant additionalinvestigation.Utah Fault or Fault SegmentBeaver Basin intrabasin/eastern margin faultsCrater Bench/Drum Mountains fault zoneCrawford Mountains (west side)Cricket Mountains fault (west side)Fish Springs faultHouse Range (west side) faultJoes Valley fault zoneLittle Valley faultsMalad segment, Wasatch fault zoneMineral Mountains (west side) faultsNorth Promontory faultOquirrh fault zoneOquirrh-Southern Oquirrh Mountains fault zoneParowan Valley faultsPavant/Tabernacle/Beaver Ridge/Meadow-Hatton/White Sage Flat faultsPorcupine Mountain faultsScipio/Pavant Range/Maple Canyon/Red Canyon faultsSkull Valley faults (southern part)Snake Valley faultsSnow Lake grabenStansbury fault zoneStrawberry faultWah Wah Mountains (south end)West Cache fault, Wellsville sectionWestern Bear Lake fault7Included InNSHM Utah Yes-YesYesYes-Yes
Figure 1. Faults included in the UGS Hazus Utah fault database, except removed the Cedar City-Parowanmonocline and faults (see table 1; database updated through 2013, modified from UGS Open-File Report 631).8
Table 3. Current status of paleoseismic investigations for Utah priority faults and fault segments identified by theUQFPWG as requiring additional investigation to adequately characterize Utah’s earthquake hazard to aminimally acceptable level.Nephi segment, Wasatch fault zone5,61Granger fault, West Valley fault zone5,6Weber segment, Wasatch fault zone5,6 – most recent eventWeber segment, Wasatch fault zone5,6 – multiple events234InvestigationsStatus2,3 (as of 2/2016)UGS Special Study 124 and 151USGS SI Map 2966UGS FTR ReportUGS Special Study 149UGS Special Study 130UGS Special Study 130Utah Lake faults and folds65UUGG FTR Report6UUGG FTR ReportUGS Special Study 121Map: UGS Open-File Report 638UGS Special Study 122UGS Miscellaneous Publication 15-6USU FTR ReportNo activityUGS Miscellaneous Publication 10-5UGS Special Study 119UGS Map 229Map: UGS Open-File Report 640UQFPWGPriority1Fault or Fault Segmentzone5,6Great Salt Lake faultCollinston and Clarkston Mountain segments, Wasatchfault zone6Sevier and Toroweap faults5,6Washington fault zone6East Cache fault zone5,6Wasatch Range back-valley faultsMain Canyon fault6Hurricane fault zone5,6789121415Levan segment, Wasatch fault zone5,616Brigham City segment, Wasatch fault zone5,6 – mostrecent event2007Bear River fault zone5,62007Salt Lake City segment, Wasatch faultzone5,6– north partHansel Valley fault zone5,620092011Nephi segment, Wasatch fault zone5,6 – long-termearthquake recordProvo, Salt Lake City and Nephi segments, Wasatch faultzone5,6 segmentation20122012Flat, Maple, and Corner Canyons, and Alpine sitesUGS Special Study 142AGU Abstracts: 2012 and 2013USGS ongoingUGS Special Study 149McCalpin (1985), Robinson (1986),McCalpin and others (1992)UUGG GSUGS/USGSUUGGUGS FTR ReportUGS/USGSOngoing--USGS work ongoingUGS FTR ReportOngoingEvans and McCalpin (2012), no otheractivityUGS Open-File Reports 638 and 640Additional work ongoing.USGS/UGSFort Canyon fault, Traverse Mountains salientUVUImprove the long-term earthquake record for CacheUSU/GEO2013Valley (East and West Cache fault zones5,6).HAZ5,6Using LiDAR to map portions of the Hurricane ,2014UGSWasatch5,6, and West Valley5,6 fault zonesAcquire high resolution aerial imagery (LiDAR, Structurefrom Motion, etc.) and map high-risk (chiefly urban)One proposal funded (3DEP), second UGS/State2015Utah hazardous faults. Identify future paleoseismicproposal not funded.of Utahtrench sites.1 See table 1 for complete working group priority list.2 FTR (Final Technical Report) to the USGS, Earthquake Hazards Program.3 Click on URL links to investigation report files available online.4 BYU (Brigham Young University), GEO-HAZ (GEO-HAZ Consulting, Inc.), USBR (U.S. Bureau of Reclamation), USGS(U.S. Geological Survey, Earthquake Hazards Program), UGS (Utah Geological Survey), USU (Utah State University),UUGG (University of Utah Department of Geology & Geophysics), UVU (Utah Valley University).5 Earthquake source on the USGS National Seismic Hazard Maps.6 Earthquake source listed in the UGS Hazus Utah fault database (UGS Open-File Report 631).9
Table 4. Utah Quaternary Fault Parameters Working Group 2017 list of highest priority Quaternary faults or faultsegments requiring additional investigation to adequately characterize Utah’s earthquake hazard to a minimallyacceptable level.Fault or Fault Segment (Not in Priority Order)Acquire paleoseismic information to address paleoseismic data gaps for(1) the five central segments of the Wasatch fault zone, (2) theOquirrh fault zone, (3) refining the latest Quaternary earthquakechronology for the Topliff Hills fault, and (4) the East and WestCache fault zones. Examples of paleoseismic data to acquire includeextent of surface-faulting rupture, earthquake timing, displacement,and subsurface fault geometry.InvestigationsStatus (as of 2/2016)1,2Nephi segment, Spring Lake andNorth Creek sites: UGS FTRReport, Special Study ongoingProvo segment, Flat Canyon site:USGS ongoing, UGS FTR ReportSalt Lake City segment, CornerCanyon site: ongoingProvo segment, Dry Creek and MapleCanyon sites: USGS ongoing, UGSFTR ReportFort Canyon fault, TraverseMountains salient: ongoingSouthern segment, East Cache faultzone: FTR ReportUGS Open-File Reports 638 and 640The UGS is mapping portions of theHurricane, Wasatch, and WestValley fault zones.Use recently acquired LiDAR data to more accurately map the traces ofthe Wasatch, West Valley, and Hurricane fault zones, and search forand map as appropriate previously undiscovered mid-valleyQuaternary faults.Acquire earthquake timing information for the Utah Lake faults toinvestigate the relation of earthquakes on that fault system to largeNo activityearthquakes on the adjacent Provo segment of the Wasatch fault zone(independent or coseismic ruptures, fault pairs?).Acquire high resolution aerial imagery (LiDAR, Structure fromOne proposal funded (3DEP), secondMotion, etc.) and map high-risk (chiefly urban) Utah hazardousproposal not funded.faults. Identify future paleoseismic trench sites.Acquire and analyze information on salt tectonics and its relation to theMain Canyon fault, Sevier detachment/Drum Mountains faults, BearRiver fault zone, Spanish Valley (Moab area), Joes Valley fault zone,New priority for 2017Levan and Fayette segments of the Wasatch fault zone, Scipio Valleyfaults, and the Gunnison fault.1 FTR (Final Technical Report) to the USGS, Earthquake Hazards Program.2 Click on URL link to investigation report files available UVUUSU/GEOHAZUGS-UGS/Stateof Utah--Table 5. Utah Quaternary Fault Parameters Working Group 2017 list of other priority faults or fault segmentsrequiring further investigation to adequately characterize Utah’s earthquake hazard to a minimally acceptablelevel.Fault or Fault SegmentParagonah fault3,4Enoch graben4UQFPWGPriority110511Clarkston fault, West Cache fault zone3,413InvestigationsStatus (as of 2/2016)2No activityMap: UGS Open-File Report 628UGS Special Study 98Fault mapping proposal not funded.No activityNo activityNo activityFault mapping proposal not funded.No activityNo activityGunnison fault417Scipio Valley faults418Faults beneath Bear Lake19Eastern Bear Lake fault zone420Carrington fault, Great Salt Lake fault zone42007Rozelle section, Great Salt Lake fault zone4,620071 See table 1 for complete working group priority list.2 Click on URL link to investigation report files available online.3 Earthquake source on the USGS National Seismic Hazard Maps.4 Earthquake source listed in the UGS Hazus Utah fault database (UGS Open-File Report 631).10Institution-UGSUGS---UGS---
5The Cedar City-Parowan monocline was removed from Priority 10 in the 2016 meeting, based on new information fromgeologic mapping in the area (UGS Map 270 and 2016 presentation file).6 Previous highest priority fault or fault segment.11
fault zones. Examples of paleoseismic data to be acquired include surface rupture extent, earthquake timing, displacement, and fault geometry. 2. Acquire earthquake timing information for the Utah Lake fault zone to investigate the relation of earthquakes on that fault system to large earthquakes on the adjacent Provo segment of the
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2nd Grade ELA-Writing Curriculum . Course Description: Across the writing genres, students learn to understand —and apply to their own writing—techniques they discover in the work of published authors. This writing course invites second-graders into author studies that help them craft powerful true stories. They engage in a poetry unit that focuses on exploring and using language in .
