Wasatch Fault
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Wasatch Fault
The WasatchWasatchThe FaultFault UtahUtah Geological Geological Survey Survey PublicPublic Information Information Series Series 40 40 11 9 9 9 9 6 6 The WasatchWasatchThe FaultFault CONTENTS The ups and downs of the Wasatch fault . .1 What is the Wasatch fault? . .1 Where is the Wasatch fault? Globally ............................................................................................2 Regionally . .2 Locally .............................................................................................4 Surface expressions (how to recognize the fault) . .5 Land use - your fault? . .8 At a glance - geological relationships . .10 Earthquakes ..........................................................................................12 When/how often? . .14 Howbig? .........................................................................................15 Earthquake hazards . .15 Future probability of the "big one" . .16 Where to get additional information . .17 Selected bibliography . .17 Acknowledgments Text by Sandra N. Eldredge. Design and graphics by Vicky Clarke. Special thanks to: Walter Arabasz of the University of Utah Seismograph Stations for per- mission to reproduce photographs on p. 6, 9, II; Utah State University for permission to use the satellite image mosaic on the cover; Rebecca Hylland for her assistance; Gary Christenson, Kimm Harty, William Lund, Edith (Deedee) O'Brien, and Christine Wilkerson for their reviews; and James Parker for drafting. Research supported by the U.S. Geological Survey (USGS), Department -
Quaternary Tectonics of Utah with Emphasis on Earthquake-Hazard Characterization
QUATERNARY TECTONICS OF UTAH WITH EMPHASIS ON EARTHQUAKE-HAZARD CHARACTERIZATION by Suzanne Hecker Utah Geologiral Survey BULLETIN 127 1993 UTAH GEOLOGICAL SURVEY a division of UTAH DEPARTMENT OF NATURAL RESOURCES 0 STATE OF UTAH Michael 0. Leavitt, Governor DEPARTMENT OF NATURAL RESOURCES Ted Stewart, Executive Director UTAH GEOLOGICAL SURVEY M. Lee Allison, Director UGSBoard Member Representing Lynnelle G. Eckels ................................................................................................... Mineral Industry Richard R. Kennedy ................................................................................................. Civil Engineering Jo Brandt .................................................................................................................. Public-at-Large C. Williatn Berge ...................................................................................................... Mineral Industry Russell C. Babcock, Jr.............................................................................................. Mineral Industry Jerry Golden ............................................................................................................. Mineral Industry Milton E. Wadsworth ............................................................................................... Economics-Business/Scientific Scott Hirschi, Director, Division of State Lands and Forestry .................................... Ex officio member UGS Editorial Staff J. Stringfellow ......................................................................................................... -
Evidence for an Active Shear Zone in Southern Nevada Linking the Wasatch Fault to the Eastern California Shear Zone
Evidence for an active shear zone in southern Nevada linking the Wasatch fault to the Eastern California shear zone Corné Kreemer, Geoffrey Blewitt, and William C. Hammond Nevada Bureau of Mines and Geology, and Nevada Seismological Laboratory, University of Nevada, Reno, Nevada 89557-0178, USA ABSTRACT In this study, our aim is to elucidate how present-day localized exten- Previous studies have shown that ~5% of the Pacifi c–North sion is transferred southward and westward from the Wasatch Fault zone America relative plate motion is accommodated in the eastern part by (1) analyzing data from continuous GPS stations, and (2) modeling of the Great Basin (western United States). Near the Wasatch fault the present-day strain rate tensor fi eld based on those GPS velocities and zone and other nearby faults, deformation is currently concentrated additional constraints from earthquake focal mechanisms. Considering the within a narrow zone of extension coincident with the eastern margin limited number of high-quality, long-running geodetic monuments, sig- of the northern Basin and Range. Farther south, the pattern of active nifi cant new insight can only be gained through integration of the comple- deformation implied by faulting and seismicity is more enigmatic. To mentary geodetic and moment tensor data sets. Our results provide new assess how present-day strain is accommodated farther south and insight into the question as to whether strain is being accommodated along how this relates to the regional kinematics, we analyze data from narrow zones separating rigid crustal blocks, such as farther to the north, continuous global positioning system (GPS) stations and model the or in a more diffuse manner, as it has over most of the history of the Basin strain rate tensor fi eld using the horizontal GPS velocities and earth- and Range. -
Fault-Rupture Hazard Zones in California
SPECIAL PUBLICATION 42 Interim Revision 2007 FAULT-RUPTURE HAZARD ZONES IN CALIFORNIA Alquist-Priolo Earthquake Fault Zoning Act 1 with Index to Earthquake Fault Zones Maps 1 Name changed from Special Studies Zones January 1, 1994 DEPARTMENT OF CONSERVATION California Geological Survey STATE OF CALIFORNIA ARNOLD SCHWARZENEGGER GOVERNOR THE RESOURCES AGENCY DEPARTMENT OF CONSERVATION MIKE CHRISMAN BRIDGETT LUTHER SECRETARY FOR RESOURCES DIRECTOR CALIFORNIA GEOLOGICAL SURVEY JOHN G. PARRISH, PH.D. STATE GEOLOGIST SPECIAL PUBLICATION 42 FAULT-RUPTURE HAZARD ZONES IN CALIFORNIA Alquist-Priolo Earthquake Fault Zoning Act With Index to Earthquake Fault Zones Maps by WILLIAM A. BRYANT and EARL W. HART Geologists Interim Revision 2007 California Department of Conservation California Geological Survey 801 K Street, MS 12-31 Sacramento, California 95814 PREFACE The purpose of the Alquist-Priolo Earthquake Fault Zoning Act is to regulate development near active faults so as to mitigate the hazard of surface fault rupture. This report summarizes the various responsibilities under the Act and details the actions taken by the State Geologist and his staff to implement the Act. This is the eleventh revision of Special Publication 42, which was first issued in December 1973 as an “Index to Maps of Special Studies Zones.” A text was added in 1975 and subsequent revisions were made in 1976, 1977, 1980, 1985, 1988, 1990, 1992, 1994, and 1997. The 2007 revision is an interim version, available in electronic format only, that has been updated to reflect changes in the index map and listing of additional affected cities. In response to requests from various users of Alquist-Priolo maps and reports, several digital products are now available, including digital raster graphic (pdf) and Geographic Information System (GIS) files of the Earthquake Fault Zones maps, and digital files of Fault Evaluation Reports and site reports submitted to the California Geological Survey in compliance with the Alquist-Priolo Act (see Appendix E). -
Seismic Imaging of a Portion of the West Chabot Fault At
SEISMIC IMAGING OF A PORTION OF THE WEST CHABOT FAULT AT CALIFORNIA STATE UNIVERSITY, EAST BAY __________________ A University Thesis Presented to the Faculty Of California State University, East Bay __________________ In Partial Fulfillment of the Requirements for the Degree Master of Science in Geology __________________ By Adrian Thomas McEvilly December 2018 ABSTRACT Located along the Pacific-North American plate boundary, the San Francisco Bay Area is home to more than seven million people and no fewer than a dozen active faults. As documented in the United States Geological Survey (USGS) publication: Earthquake Outlook for the San Francisco Bay Region 2014–2043, the Hayward, West Napa, Greenville, Calaveras, and several other faults of the San Andreas Fault system have all produced earthquakes of magnitude 6.0 or greater in the past 150 years, and the occurrence of lower magnitude (<M6.0) earthquakes is not uncommon on these faults as well as the many other faults within the region. The San Francisco Bay region is statistically likely (72%) to produce one or more M6.7 or greater earthquakes before 2043, with the Hayward Fault as the most statistically likely (33%) to produce such an event. Earthquakes are commonly classified by their moment magnitude, a metric that accounts for the area of fault rupture, the average slip distance along the fault, and the force required to initiate the temblor. However, moment magnitude does not consider the qualities of the earth materials through which the rupture occurs, or the depth of the earthquake. While moment magnitude describes the size of the earthquake, strong shaking is a function of the earthquake’s source, the path the earthquake travels, and the site conditions. -
Database of Potential Sources for Earthquakes Larger Than Magnitude 6 in Northern California
U. S. DEPARTMENT OF THE INTERIOR U. S. GEOLOGICAL SURVEY DATABASE OF POTENTIAL SOURCES FOR EARTHQUAKES LARGER THAN MAGNITUDE 6 IN NORTHERN CALIFORNIA By The Working Group on Northern California Earthquake Potential Open-File Report 96-705 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American stratigraphic code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 1996 Working Group on Northern California Earthquake Potential William Bakun U.S. Geological Survey Edward Bortugno California Office of Emergency Services William Bryant California Division of Mines & Geology Gary Carver Humboldt State University Kevin Coppersmith Geomatrix N. T. Hall Geomatrix James Hengesh Dames & Moore Angela Jayko U.S. Geological Survey Keith Kelson William Lettis Associates Kenneth Lajoie U.S. Geological Survey William R. Lettis William Lettis Associates James Lienkaemper* U.S. Geological Survey Michael Lisowski Hawaiian Volcano Observatory Patricia McCrory U.S. Geological Survey Mark Murray Stanford University David Oppenheimer U.S. Geological Survey William D. Page Pacific Gas & Electric Co. Mark Petersen California Division of Mines & Geology Carol S. Prentice U.S. Geological Survey William Prescott U.S. Geological Survey Thomas Sawyer William Lettis Associates David P. Schwartz* U.S. Geological Survey Jeff Unruh William Lettis Associates Dave Wagner California Division of Mines & Geology -
SSA 2016 Detailed Program Schedule
• Meeting Program, 416 Program for 2016 SSA Annual Meeting Presenting author is indicated in bold. Wednesday, 20 April—Oral Sessions Time Tuscany 1/2 Tuscany 3/4 Tuscany 5/6 Tuscany 7/8 Tuscany A Advances in Seismotectonics Past and Multidisciplinary Induced Seismicity Noninvasive Beyond the Plate Future Seismic Studies of Session Chairs: Approaches to Boundary Moment Release: Earthquakes—Slow, Thomas Braun, Ivan Characterizing Session Chairs: Contributions Fast, and In Between: G. Wong, Justin Seismic Site Conveners: Will from Statistics and A Broad Range of Rubinstein, Thomas Conditions Levandowski, Geodesy Fault Behavior in Goebel, David Eaton, Session Chairs: Alan Christine Powell, and Session Chairs: Corné Space and Time Gail Atkinson, and Yong, Sheri Molnar, Oliver Boyd (see page Kreemer and Ilya Session Chair: Abhijit Honn Kao (see page and Aysegul Askan 449) Zaliapin (see page Ghosh (see page 462) 466) (see page 449) 458) 8:30 Site Response Damaged Crust and Invited: Assessing Invited: Universality Invited: am Implications Concentrations of the Sensitivity of of Slow Earthquakes Observations of Associated with North American Statistical Tests in the Very Low Numerous Hydraulic Common Methods Intraplate Seismic on Earthquake Frequency Band: Fracturing Induced used to Account for Vs Zones. Thomas, W. A., Catalogs. Daub, E. Summary of Regional Earthquake Profile Uncertainty. Powell, C. A. G., Trugman, D. T., Studies. Ide, S. Sequences in Cox, B. R., Teague, Johnson, P. A. Harrison County D. P. Ohio since 2013. Friberg, P. A., Brudzinski, M. R., Skoumal, R. J., Currie, B. S. 8:45 Blind-Test Case Roaming Invited: Earthquake Very Low Frequency Invited: Linking am Studies to Validate Midcontinental Forecasts based Earthquakes (VLFEs) Fossil Reefs with Non-Invasive Shear- Earthquakes: on Seismological, in Cascadia NOT Earthquakes: Wave Velocity Occurrence, Causes, Geological, and Coincident with Geologic Insight Profiling in Diverse and Hazards. -
SSA 2015 Annual Meeting Announcement Seismological Society of America Technical Sessions 21--23 April 2015 Pasadena, California
SSA 2015 Annual Meeting Announcement Seismological Society of America Technical Sessions 21--23 April 2015 Pasadena, California IMPORTANT DATES Meeting Pre-Registration Deadline 15 March 2015 Hotel Reservation Cut-Off (gov’t rate) 03 March 2015 Hotel Reservation Cut-Off (regular room) 17 March 2015 Online Registration Cut-Off 10 April 2015 On-site registration 21--23 April 2015 PROGRAM COMMITTEE This 2015 technical program committee is led by co-chairs Press Relations Pablo Ampuero (California Institute of Technology, Pasadena Nan Broadbent CA) and Kate Scharer (USGS, Pasadena CA); committee Seismological Society of America members include Domniki Asimaki (Caltech, Mechanical 408-431-9885 and Civil Engineering), Monica Kohler (Caltech, Mechanical [email protected] and Civil Engineering), Nate Onderdonk (CSU Long Beach, Geological Sciences) and Margaret Vinci (Caltech, Office of Earthquake Programs) TECHNICAL PROGRAM Meeting Contacts The SSA 2015 technical program comprises 300 oral and 433 Technical Program Co-Chairs poster presentations and will be presented in 32 sessions over Pablo Ampuero and Kate Scharer 3 days. The session descriptions, detailed program schedule, [email protected] and all abstracts appear on the following pages. Seachable abstracts are at http://www.seismosoc.org/meetings/2014/ Abstract Submissions abstracts/. Joy Troyer Seismological Society of America 510.559.1784 [email protected] LECTURES Registration Sissy Stone President’s Address Seismological Society of America The President’s Address will be presented -
Earthquake Potential Along the Hayward Fault, California
Missouri University of Science and Technology Scholars' Mine International Conferences on Recent Advances 1991 - Second International Conference on in Geotechnical Earthquake Engineering and Recent Advances in Geotechnical Earthquake Soil Dynamics Engineering & Soil Dynamics 10 Mar 1991, 1:00 pm - 3:00 pm Earthquake Potential Along the Hayward Fault, California Glenn Borchardt USA J. David Rogers Missouri University of Science and Technology, [email protected] Follow this and additional works at: https://scholarsmine.mst.edu/icrageesd Part of the Geotechnical Engineering Commons Recommended Citation Borchardt, Glenn and Rogers, J. David, "Earthquake Potential Along the Hayward Fault, California" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 4. https://scholarsmine.mst.edu/icrageesd/02icrageesd/session12/4 This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License. This Article - Conference proceedings is brought to you for free and open access by Scholars' Mine. It has been accepted for inclusion in International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics by an authorized administrator of Scholars' Mine. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact [email protected]. Proceedings: Second International Conference on Recent Advances In Geotechnical Earthquake Engineering and Soil Dynamics, March 11-15, 1991 St. Louis, Missouri, Paper No. LP34 Earthquake Potential Along the Hayward Fault, California Glenn Borchardt and J. David Rogers USA INTRODUCTION TECTONIC SETI'ING The Lorna Prieta event probably marks a renewed period of The Hayward fault is a right-lateral strike-slip fea major seismic activity in the San Francisco Bay Area. -
Paleoseismologic Investigations of the Hurricane Fault in Northwestern Arizona and Southwestern Utah
Paleoseismologic Investigations of the Hurricane Fault in Northwestern Arizona and Southwestern Utah Heidi D. Stenner1,3, William R. Lund2, Philip A. Pearthree1, Benjamin L. Everitt4 Arizona Geological Survey Open-File Report 99-8 April 1999 Reformatted and revised, May, 2005 1Arizona Geological Survey, 416 W. Congress St. Tucson, AZ 85701 2Utah Geological Survey, Southern Utah Regional Office 3Department of Geology, Arizona State University, Tempe, AZ 85287 4Utah Department of Water Resources "Research supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number (Arizona Geological Survey, 1434-HQ-97-GR-03047). The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government." TABLE OF CONTENTS Page 1 ABSTRACT 3 CHAPTER 1. INTRODUCTION AND OVERVIEW 6 CHAPTER 2. RECONNAISSANCE PALEOSEISMIC INVESTIGATION OF THE HURRICANE FAULT IN SOUTHWESTERN UTAH 45 CHAPTER 3. PALEOSEISMOLOGY OF THE SOUTHERN ANDERSON JUNCTION SECTION OF THE HURRICANE FAULT, NORTHWESTERN ARIZONA AND SOUTHWESTERN UTAH 81 CHAPTER 4. LATE QUATERNARY FAULTING ON THE WHITMORE CANYON SECTION OF THE HURRICANE FAULT, NORTHWESTERN ARIZONA 99 REFERENCES CITED 106 APPENDICES 2 ABSTRACT We have completed initial paleoseismologic investigations to evaluate the recency and size of paleoearthquakes and long-term slip rates on the Hurricane fault in southern Utah and northern Arizona (SUNA). The Hurricane fault is a long, west-dipping normal fault with substantial late Cenozoic displacement within the structural and seismic transition between the Colorado Plateau and the Basin and Range province. Previous reconnaissance studies of the fault in northern Arizona and southern Utah had documented evidence of late Quaternary activity. -
The Great Basin-Colorado Plateau Transition in Central Utah
Utah Geological Association Publication 30 - Pacific Section American Association of Petroleum Geologists Publication GB78 1 GREAT BASIN-COLORADO PLATEAU TRANSITION IN CENTRAL UTAH: AN INTERFACE BETWEEN ACTIVE EXTENSION AND STABLE INTERIOR PHILIP E. WANNAMAKER1, JOHN M. BARTLEY2, ANNE F. SHEEHAN3, CRAIG H. JONES3, ANTHONY R. LOWRY4, TREVOR A. DUMITRU5, TODD A. EHLERS2, W. STEVEN HOLBROOK6, G. LANG FARMER3, MARTYN J. UNSWORTH7, DARRELL B. HALL2, DAVID S. CHAPMAN2, DAVID A. OKAYA8, BARBARA E. JOHN6, AND JACK A. WOLFE9 ABSTRACT A fundamental tectonic boundary appears to have existed below the site of the present-day Colorado Plateau to Great Basin Transition Zone since Precambrian times. The Plateau proper has seen little deformation since Middle Proterozoic conti- nental assembly apart from Cenozoic uplift and limited thick-skinned contraction and calc-alkaline plutonism. In contrast, the Great Basin region has been subject to repeated episodes of both contractional and extensional tectonism, and extensional activity continues into the modern day. Evidence exists that the Colorado Plateau at its western margin is being converted to lithosphere with rifted Great Basin properties. Some models for migrating extension call upon progressive gravitational collapse of thicker crust of the plateau margin as it warms, possibly aided by hardening of the previously rifted lithosphere (i.e., Great Basin interior) via crustal thinning and cooling. However, this rather homogeneous and temporally gradual model of deformation has only partial applicability to evolu- tion of the western Colorado Plateau and eastern Great Basin. On the one hand, the limited degree of block style faulting, high elevation, and high apparent elastic thickness of the Transition Zone resemble properties of the Colorado Plateau. -
Distributed Deformation Across the Rio Grande Rift, Great Plains, and Colorado Plateau
Geology, 40(1), 23-26, 2012 Distributed Deformation across the Rio Grande Rift, Great Plains, and Colorado Plateau Henry T. Berglund1, Anne F. Sheehan2, Mark H. Murray3, Mousumi Roy4, Anthony R. Lowry5, R. Steven Nerem6, and Frederick Blume1 1UNAVCO Inc, 6350 Nautilus Drive, Boulder, Colorado 80301-5553, USA 2Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0399, USA 3Department of Earth and Environmental Science, New Mexico Tech, Socorro, New Mexico 87801, USA 4Department of Earth & Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131-1116, USA 5Department of Geology, Utah State University, Logan, Utah 84322-4505, USA 6Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado 80309-0429, USA ABSTRACT We use continuous measurements of GPS sites from across the Rio Grande Rift, Great Plains, and Colorado Plateau to estimate present-day surface velocities and strain rates. Velocity gradients from five east-west profiles suggest an average of ~1.2 nanostrains/yr east-west extensional strain rate across these three physiographic provinces. The extensional deformation is not concentrated in a narrow zone centered on the Rio Grande Rift but rather is distributed broadly from the western edge of the Colorado Plateau well into the western Great Plains. This unexpected pattern of broadly distributed deformation at the surface has important implications for our understanding of how low strain-rate deformation within continental interiors is accommodated. INTRODUCTION Global positioning system (GPS) monuments installed for the EarthScope Plate Boundary Observatory (PBO) and the Rio Grande Rift GPS experiment (Fig. 1) have greatly enhanced modern geodetic coverage of the physiographic regions of the Rio Grande Rift and the Colorado Plateau.