Author :
Publisher :
Page : pages
File Size : 18,77 MB
Release : 2006
Category : Earthquakes
ISBN :
This CD (39 p. report, 2 plates) contains critical information regarding paleoearthquake parameters such as earthquake timing, recurrence, displacement, slip rate, and fault geometry.
Author : Anthony J. Crone
Publisher : Utah Geological Survey
Page : 65 pages
File Size : 18,18 MB
Release : 2014-09-15
Category : CD-ROMs
ISBN : 1557918945
This 43-page report presents new data from the Willow Creek site that provides well-defined and narrow bounds on the times of the three youngest earthquakes on the southern strand of the Nephi segment, Wasatch Fault zone, and refines the time of the youngest earthquake to about 200 years ago. This is the youngest surface rupture on the entire Wasatch fault zone, which occurred about a century or less before European settles arrived in Utah. Two trenches at the Willow Creek site exposed three scarp-derived colluvial wedges that are evidence of three paleoearthquakes. OxCal modeling of ages from Willow Creek indicate that paleoearthquake WC1 occurred at 0.2 ± 0.1 ka, WC2 occurred at 1.2 ± 0.1 ka, and WC3 occurred at 1.9 ± 0.6 ka. Stratigraphic constraints on the time of paleoearthquake WC4 are extremely poor, so OxCal modeling only yields a broadly constrained age of 4.7 ± 1.8 ka. Results from the Willow Creek site significantly refine the times of late Holocene earthquakes on the Southern strand of the Nephi segment, and this result, when combined with a reanalysis of the stratigraphic and chronologic information from previous investigations at North Creek and Red Canyon, yield a stronger basis of correlating individual earthquakes between all three sites.
Author : William R. Lund
Publisher : Utah Geological Survey
Page : 114 pages
File Size : 19,16 MB
Release : 2005-06-30
Category : Science
ISBN : 1557917272
This report presents the results of the Utah Quaternary Fault Parameters Working Group (hereafter referred to as the Working Group) review and evaluation of Utah’s Quaternary fault paleoseismic-trenching data. The purpose of the review was to (1) critically evaluate the accuracy and completeness of the paleoseismictrenching data, particularly regarding earthquake timing and displacement, (2) where the data permit, assign consensus, preferred recurrence-interval (RI) and vertical slip-rate (VSR) estimates with appropriate confidence limits to the faults/fault sections under review, and (3) identify critical gaps in the paleoseismic data and recommend where and what kinds of additional paleoseismic studies should be performed to ensure that Utah’s earthquake hazard is adequately documented and understood. It is important to note that, with the exception of the Great Salt Lake fault zone, the Working Group’s review was limited to faults/fault sections having paleoseismic-trenching data. Most Quaternary faults/fault sections in Utah have not been trenched, but many have RI and VSR estimates based on tectonic geomorphology or other non-trench-derived studies. Black and others compiled the RI and VSR data for Utah’s Quaternary faults, both those with and without trenches.
Author :
Publisher :
Page : pages
File Size : 12,61 MB
Release : 2009
Category : Earthquake hazard analysis
ISBN :
This CD contains a 27 page report, 9 appendices and 2 plates. This study presents new paleoseismic information for the northern Weber segment of the Wasatch Fault zone, collected as part of a joint Utah Geological Survey and U.S. Geological Survey fault-trench investigation at Rice Creek. This research expands the record of paleoearthquakes provided new timing and displacement data for the most recent earthquake and helps reduce uncertainties in earthquake timing, recurrence, displacement and vertical slip rate.
Author :
Publisher :
Page : 740 pages
File Size : 41,38 MB
Release : 1984
Category : Earthquake hazard analysis
ISBN :
Chapters A-J are issued as a single volume and are not available separately.
Author : Working Group on Utah Earthquake Probabilities
Publisher :
Page : 164 pages
File Size : 22,89 MB
Release : 2016
Category : Earthquake hazard analysis
ISBN : 9781557919236
This publication presents probabilistic earthquake forecasts developed by the Working Group on Utah Earthquake Probabilities which developed 30,50, and 100 year forecasts that include combined time dependent probabilities of large earthquakes for the five central segments of the Wasatch Fault Zone.
Author : Christopher B. DuRoss
Publisher : Utah Geological Survey
Page : 39 pages
File Size : 44,35 MB
Release : 2008
Category : CD-ROMs
ISBN : 1557917892
This CD contains a 33 page report, appendix, and plate. This study presents the results of fault-trench excavations near Santaquin, Utah, and includes discussion of (1) previous paleoseismic investigations on the Nephi segment, (2) the geology of the Santaquin trench site and excavations (3) paleoseismic results, including the timing of the most recent surface-faulting earthquake, fault displacement and slip rate, and surface-faulting earthquake recurrence and (4) implications for the segmentation of the southern Wasatch fault zone.
Author : Michael Jackson
Publisher :
Page : 23 pages
File Size : 25,38 MB
Release : 1991
Category : Earthquakes
ISBN :
Author : William R. Lund
Publisher : Utah Geological Survey
Page : 37 pages
File Size : 34,45 MB
Release : 2008
Category : Science
ISBN : 1557917876
This 37 page report presents the results of a study of the Sevier fault in Utah.
Author : James McCalpin
Publisher : Utah Geological Survey
Page : 53 pages
File Size : 23,43 MB
Release : 2002
Category : Nature
ISBN : 1557916713
This Utah Geological Survey Miscellaneous Publication, Post-Provo Paleoearthquake Chronology of the Brigham City Segment, Wasatch Fault Zone, Utah, is the eleventh report in the Paleoseismology of Utah series. This series makes the results of paleoseismic investigations in Utah available to geoscientists, engineers, planners, public officials, and the general public. These studies provide critical information on paleoearthquake parameters such as timing, recurrence, displacement, slip rate, and fault geometry which can be used to characterize potential seismic sources and evaluate the long-term seismic hazard presented by Utah’s Quaternary faults. This report presents the results of the most extensive single paleoseismic-trenching project yet conducted on the Wasatch fault zone. The purpose of the study was to lengthen the paleoseismic chronology for the Brigham City segment of the Wasatch fault zone beyond the 6,000-year record previously available, and to resolve questions regarding the irregular pattern of paleoearthquakes reported by earlier workers for the Brigham City segment. This study makes extensive use of radiocarbon, thermoluminescence, and infrared stimulated luminescence dating techniques to develop a real-time chronology of past surface-faulting earthquakes.
