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Bathymetry, acoustic backscatter, and minisparker seismic-reflection datasets collected southwest of Montague Island and southwest of Chenega, Alaska during field activity 2014-622-FA High-resolution acoustic backscatter data, bathymetry data, single channel minisparker seismic-reflection data were collected by the U.S. Geological Survey (USGS) and the Alaska Department of Fish and Game in May of 2014 southwest of Chenega Island and southwest of Montague Island, Alaska. Data were collected aboard the Alaska Department of Fish and Game vessel, R/V Solstice, during USGS field activity 2014-622-FA, using a pole mounted 100-kHz Reson 7111 multibeam echosounder, a 500 Joule SIG 2-mille minisparker sound source and a single channel streamer. Categories: Data; Tags: Geomorphology, Geophysics, Marine Geology, Seismology, Structural Geology Compilation of Geologic and Seismic Velocity Characteristics at Advanced National Seismic System Strong Motion Accelerometer Sites Near-surface site characteristics are critical for accurately modeling ground motion, which in turn influences seismic hazard analysis and design of critical infrastructure. Currently, there are many strong motion accelerometers within the Advanced National Seismic System (ANSS) that are missing this information. We use a Geographic Information Systems (GIS) based framework to intersect the site coordinates of approximately 5,500 ANSS accelerometers located throughout the United States and its territories with geology and velocity information. We consider: (1) surficial geology from digitized geologic maps (Horton, 2017; Wilson et al., 2015; Sherrod et al., 2007; Bawiec, 1999; Saucedo, 2005; Bedrossian et al., 2012;... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ANSS, Alabama, American Samoa, Arizona, Arkansas, All tags... California, Colorado, Connecticut, Delaware, Florida, Geography, Geophysics, Georgia, Guam, Idaho, Illinois, Indiana, Information Sciences, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Remote Sensing, Rhode Island, Seismic site characteristics, Seismology, Soil Sciences, South Carolina, South Dakota, Strong Motion, Structural Geology, Tennesee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Vs30, Washington, West Virginia, Wisconsin, Wyoming, earthquake seismology, seismic stations, vs30 measurements, vs30 proxy, Fewer tags High-Resolution Aeromagnetic Survey of the Pasco Area, Washington and Oregon This data release provides access to a low-altitude, aeromagnetic survey of a part of south-central Washington and north-central Oregon. The survey extends from the Blue Mountains westward to the Cascade Range and covers the Oregon cities of The Dalles, Hermiston, and Milton Freewater and the Washington cities of Richland, Pasco, Kennewick, and Walla Walla. Data were acquired during the summer of 2010 by Goldak Airborne Surveys working under contract to the U.S. Geological Survey. Total magnetic field values were acquired using a fixed-wing aircraft flown at a target elevation of 150 m above terrain (305 m over urban areas) and along flight lines and tie lines spaced 400 m and 4000 m apart, respectively. Flight... Categories: Data; Tags: Benton, Geophysics, Gilliam, Mineral Resources, Morrow, All tags... Seismology, Sherman, Structural Geology, The Dalles, USGS Science Data Catalog (SDC), Umatilla, Walla Walla, aeromagnetic surveying, crust (earth), earthquakes, geoscientificInformation, magnetic anomaly, magnetic field (earth), magnetometer measurement, neotectonic processes, Fewer tags Whole-rock chemistry of core from serpentinite mud volcanoes, Northern Mariana subduction zone We present whole-rock geochemical analyses of 12 core samples obtained from three serpentinite mud volcanoes (Yinazao, Asut Tesoru, and Fantangisna) located on the forearc of the Mariana subduction system, where the Pacific Plate descends beneath the Philippine Sea Plate. The core was collected during International Ocean Discovery Program Expedition 366 of 2016-2017. The materials comprising the mud volcanoes have risen diapirically along normal faults in the forearc that may extend down to the subducting slab. Ten of the samples are thoroughly serpentinized ultramafic rocks. The other two come from cored intervals into Fantangisna mud volcano that contain materials derived from the subducting Pacific Plate, and... Categories: Data; Tags: Geochemistry, Mariana Trench, Micronesia, Northern Mariana Islands, Structural Geology, All tags... USGS Science Data Catalog (SDC), geochemistry, mud volcano, serpentinite, subduction zone, Fewer tags Bedrock stratigraphic and structural data and deep-seated landslide density for the Tyee Formation, OR, USA Compilation of field data collected in the Oregon Coast Range Tyee Formation. Location, strike and dip, Relative composition and bed thickness of interbedded sandstone and siltstone, Schmidt Hammer stiffness, notes, and sampled landslide density are provided. Landslide density is calculated using the manually mapped landslide deposit polygons from LaHusen et al. (2020). Categories: Data; Tags: Geomorphology, Oregon, Stratigraphy, Structural Geology, USGS Science Data Catalog (SDC), All tags... engineering geology, geology, geoscientificInformation, landslide susceptibility assessment, landslides, stratigraphy, Fewer tags Modified basal contact of the Tertiary Lares Limestone in the vicinity of Utuado, Puerto Rico, USA, derived from USGS Open-File Report 98-038 This dataset comprises a vector shapefile of the Puerto Rico geologic map from Bawiec et al. (1999), clipped to study areas in the Lares, Utuado, and Naranjito municipalities, with a modified basal contact of the Tertiary Lares Limestone (Tla) re-mapped using a lidar-derived digital elevation model (DEM) (USGS, 2018). The limestone unit of interest forms a prominent break in slope with the underlying geologic units, and this break in slope was mapped as the Tla basal contact. Only the southern contact of the Tla unit was modified. References: Bawiec, W.J., ed., 1999, Geology, geochemistry, geophysics, mineral occurrences and mineral resource assessment for the Commonwealth of Puerto Rico: U.S. Geological Survey... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Geomorphology, Puerto Rico, Stratigraphy, Structural Geology, USGS Science Data Catalog (SDC), All tags... Utuado, farming, Fewer tags 2015 high resolution seismic acquisition at Dos Palmas Preserve, Mecca, California In March 2015, the U.S. Geological Survey acquired seismic reflection and refraction data along an approximately 2.8-km-long profile across northwest-trending San Andreas Fault splays located at the Dos Palmas Preserve east of Salton Sea. To acquire the reflection and refraction data, we collocated shots and geophones, spaced every 3 m along the profile. We used 933 SercelTM L40A P-wave (40-Hz vertical-component) geophones with a sensitivity of 22.34 volts/meter/second to record 925 P-wave shots. We generated P-wave data using one of two active sources: 400-grain Betsy-SeisgunTM shots at approximately every 90 m and a 3.5-kg sledgehammer and steel plate combination at every 3 m between the seisgun shots. All data... Categories: Data; Tags: Dos Palmas Spring, Geophysics, Mecca, Salton Sea, Seismology, All tags... Structural Geology, USGS Science Data Catalog (SDC), Water Resources, earthquake hazards, faulting (geologic), groundwater, groundwater flow, seismic reflection methods, seismic refraction methods, seismology, Fewer tags Compilation of offset measurements and fault data for global strike-slip faults with multiple earthquakes This Data Release provides the compilation of offset measurement datasets and associated fault data to accompany the manuscript “Climatic influence on the expression of strike-slip faulting” by Reitman et al. In addition to a ReadMe file, it includes two tabular datasets, one code, and one text file. The datasets are a compilation of offset measurement data (“data_multiple_eq_offsets.xlsx”) from 31 studies of strike-slip faults with multiple earthquakes, and the associated fault data (“fault_data" provided in csv and xlsx formats) with inputs necessary to do the analysis described in the accompanying manuscript. The code (“code_multiple_eq_offsets.ipynb”) reads the offset measurement data from each sheet of “data_multiple_eq_offsets.xlsx”... Categories: Data; Tags: Geomorphology, Seismology, Structural Geology, USGS Science Data Catalog (SDC), earthquake occurrences, All tags... earthquakes, fault zones, faults, geomorphology, geoscientificInformation, hazards, Fewer tags 2020 Update to the Quaternary Fault and Fold Database for Washington State This release is an update to the online "Quaternary fault and fold database" for Washington State. The online database was last updated for Washington in 2014 – this 2020 update includes newly identified and modified traces and geometries for on-shore faults gleaned from new peer-reviewed studies and mapping of active faults within the state of Washington. These data contain lines representing the location of faults with known or suspected Quaternary (<1,600,000 yrs) activity in the state of Washington. This data was compiled in conjunction with the Washington State Geological Survey. Faults are attributed following the Quaternary fault and fold database attributes, including information such as age, slip sense,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Faulting, Geomorphology, Quaternary, Seismic, Seismology, All tags... Structural Geology, USA, USGS Science Data Catalog (SDC), Washington State, Fewer tags Multichannel Seismic-Reflection and Navigation Data Collected Using SIG ELC1200 and Applied Acoustics Delta Sparkers and Geometrics GeoEel Digital Streamers During U.S. Geological Survey Field Activity 2020-014-FA, Southwest of Puerto Rico, March 2020 In March 2020, the U.S. Geological Survey and the University of Puerto Rico Mayagüez (UPRM) Department of Marine Sciences conducted a marine seismic-reflection experiment focused on observing geophysical evidence of submarine faulting and mass wasting related to the southwestern Puerto Rico seismic sequence of 2019–20. The seismic sequence culminated with a magnitude 6.4 earthquake centered beneath Guayanilla Canyon on January 7, 2020 and caused shoreline subsidence, rockfalls, and considerable damage to buildings. The survey was conducted during March 7–13 out of the UPRM Isla Magueyes Laboratories aboard the research vessel Sultana. Approximately 226 line kilometers of multichannel seismic reflection data were... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Applied Acoustics Delta sparker, CMHRP, Caribbean Sea, Coastal and Marine Hazards and Resources Program, DOI, All tags... Department of the Interior, GeoEel, Geometrics, Geophysics, Guanica Bay, Guayanilla Bay, Guayanilla Canyon, Isla Magueyes, Isla Magueyes Laboratories, La Parguera, Marine Geology, Marine Geology, PNG, R/V Sultana, SEG-Y traces, SIG ELC1200 sparker, Stratigraphy, Stratigraphy, Structural Geology, Structural Geology, U.S. Geological Survey, UPRM, USGS, United States of America, University of Puerto Rico Mayaguez - Department of Marine Science, WHCMSC, Woods Hole Coastal and Marine Science Center, common midpoint stack, field activity number 2020-014-FA, geoscientificInformation, image, location, marine geology, marine geology, marine geophysics, marine geophysics, multi-channel streamer, navigation, navigational data, oceans, seismic navigation, seismic reflection, seismic reflection methods, shapefile, sub-bottom profiling, trackline navigation, Fewer tags Airborne magnetic and radiometric survey, Charleston, South Carolina and surrounds, 2019 This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over Charleston, South Carolina and the surrounding region. These data were collected to better understand earthquake hazards in the Charleston seismic zone by imaging structural features in the crystalline basement and to image heavy mineral sands containing titanium, zirconium, and rare earth elements using radiometric data (gamma spectrometry), which is sensitive to thorium in monazite. This survey represents a collaborative effort by the U.S. Geological Survey (USGS) Earthquake Hazards Program, Mineral Resources Program, National Cooperative Mapping Program, and Earth Mapping Resource Initiative... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Berkeley County, Charleston, Charleston County, Clarendon County, Colleton County, All tags... Dorchester County, EHP, Earth Mapping Resources Initiative, EarthMRI, Earthquake Hazards Program, Economic Geology, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Georgetown County, MRP, Mineral Resources, Mineral Resources Program, NCGMP, National Cooperative Geologic Mapping Program, Orangeburg County, Sedimentology, Seismology, South Carolina, Structural Geology, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), United States, Williamsburg County, aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, potassium, thorium, uranium, Fewer tags Folds--Offshore of Aptos Map Area, California This part of DS 781 presents data for the folds for the geologic and geomorphic map of the Offshore Aptos map area, California. The vector data file is included in "Folds_OffshoreAptos.zip," which is accessible from https://doi.org/10.5066/F7K35RQB. These data accompany the pamphlet and map sheets of Cochrane, G.R., Johnson, S.Y., Dartnell, P., Greene, H.G., Erdey, M.D, Dieter, B.E., Golden, N.E., Hartwell, S.R., Ritchie, A.C., Kvitek, r.G., Maier, K.L., Endris, C.A., Davenport, C.W., Watt, J.T., Sliter, R.W., Finlayson, D.P., and Krigsman, L.M., (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Aptos, California: U.S. Geological Survey Open-File Report 2016–1025, 43 p.,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Aptos, CMHRP, Capitola, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, All tags... Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz County, Soquel, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, distributions, environment, folding (geologic), geologic maps, geologic structure, geoscientificInformation, imageryBaseMapsEarthCover, marine geology, marine geology, oceans, physical habitats and geomorphology, seabed, structural geology, structural geology, Fewer tags High-resolution seismic data from the Frijoles Fault of the San Gregorio Fault zone, Año Nuevo, California The U.S. Geological Survey acquired high-resolution P- and S-wave seismic data across the Frijoles Fault strand of the San Gregorio Fault Zone (SGFZ) at Año Nuevo, California in 2012. The SGFZ is a Holocene-active, dominantly right-lateral fault system that trends more than 200 km along the California coastline. The Frijoles Fault is one of several onshore strands of the SGF system, and together the strands represent a 3- to 4-km wide fault zone at Año Nuevo. Prior paleoseismology studies indicate highly variable slip-rate estimates, indicating considerable uncertainty about the slip history of the SGFZ and the seismic hazard it poses. Amongst the onshore strands of the SGFZ at Año Nuevo, the Frijoles Fault presented... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ano Nuevo, Geophysics, Northern California Coastal, San Mateo, Seismology, All tags... Structural Geology, USGS Science Data Catalog (SDC), earthquake occurrences, earthquake zone, earthquakes, fault zones, faulting (geologic), geoscientificInformation, hazards, seismic reflection profiling, seismic refraction profiling, seismology, Fewer tags High-resolution digital elevation model of Mount St. Helens and upper North Fork Toutle River basin, based on airborne lidar surveys of July-September, 2017 The lateral blast, debris avalanche, and lahars of the May 18th, 1980, eruption of Mount St. Helens, Washington, dramatically altered the surrounding landscape. Lava domes were extruded during the subsequent eruptive periods of 1980-1986 and 2004-2008. During 2017, U.S. Forest Service contracted the acquisitions of airborne lidar surveys of Mount St. Helens and upper North Fork Toutle River basin, part of a larger 2017-2018 survey of the Gifford Pinchot National Forest. The U.S. Geological Survey combined and reprojected 81 raster datasets, provided by the U.S. Forest Service in October 2018, into a single digital elevation model (DEM) of the ground surface, including beneath forest cover (that is, 'bare earth').... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: ALS, Cascade Range, Cowlitz County, DEM, Ecology, All tags... Geochemistry, Geography, Geomorphology, Geophysics, Glaciology, Hydrology, Land Use Change, Loowit, Mount St. Helens, North Fork Toutle River, Remote Sensing, Sedimentology, Seismology, Soil Sciences, Structural Geology, Toutle River, USA, USGS Science Data Catalog (SDC), Volcanology, WA, Washington, Water Quality, Water Resources, airborne laser scanning, bare earth, biota, digital elevation model, elevation data, geomorphology, glacier, hydrology, lidar, light detection and ranging, sediment, topography, volcanic landforms, volcano, volcano, Fewer tags Seismic reflection imaging of the low-angle Panamint normal fault system, eastern California, 2018 A fundamental question in seismic hazard analysis is whether <30º-dipping low-angle normal faults (LANFs) slip seismogenically. In comparison to more steeply dipping (45-60º) normal faults, LANFs have the potential to produce stronger shaking because of their increased possible rupture area in the seismogenic crust. While LANFs have been documented globally, examples of seismogenically active LANFs are limited. The western margin of the Panamint Range in eastern California is defined by an archetypal LANF that dips west beneath Panamint Valley. In addition, high-angle dextral-oblique normal faults displace mid-to-late Quaternary alluvial fans near the range front. To image shallow (<1 km depth), crosscutting relationships... Categories: Data; Tags: California, Fault, Geophysics, Low-angle, Normal Fault, All tags... Panamint Valley, Seismic, Seismology, Slip, Slipping, Structural Geology, USGS Science Data Catalog (SDC), Fewer tags Faults--Offshore of Aptos Map Area, California This part of DS 781 presents data for the faults for the geologic and geomorphic map of the Offshore Aptos map area, California. The vector data file is included in "Faults_OffshoreAptos.zip," which is accessible from https://doi.org/10.5066/F7K35RQB. These data accompany the pamphlet and map sheets of Cochrane, G.R., Johnson, S.Y., Dartnell, P., Greene, H.G., Erdey, M.D, Dieter, B.E., Golden, N.E., Hartwell, S.R., Ritchie, A.C., Kvitek, r.G., Maier, K.L., Endris, C.A., Davenport, C.W., Watt, J.T., Sliter, R.W., Finlayson, D.P., and Krigsman, L.M., (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Aptos, California: U.S. Geological Survey Open-File Report 2016–1025, 43... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Aptos, CMHRP, Capitola, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, All tags... Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz County, Soquel, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, distributions, environment, faulting (geologic), geologic maps, geologic structure, geoscientificInformation, imageryBaseMapsEarthCover, marine geology, marine geology, oceans, physical habitats and geomorphology, seabed, structural geology, structural geology, Fewer tags Whole-rock chemistry of Hole G core samples from the San Andreas Fault Observatory at Depth (SAFOD), California We present whole-rock geochemical analyses of 27 Phase 3 core samples obtained from Hole G of the San Andreas Fault Observatory at Depth, which crosses the creeping section of the San Andreas Fault ~14 km NW of Parkfield, California. These new data will essentially double the published whole-rock chemical dataset for the SAFOD Hole G core. Two, meters-wide zones of foliated gouge where fault creep is concentrated were successfully cored in Hole G. The gouge zones are bounded on either side by variably deformed structural units of sedimentary rock. Sampling for this dataset was focused on the gouge-wall rock boundaries and meters-long sections of the wall rocks that previously lacked chemical data. Major, trace,... Categories: Data; Tags: Geochemistry, Geochemistry, Parkfield, San Luis Obispo County, Structural Geology, All tags... USGS Science Data Catalog (SDC), fault zone, Fewer tags Geochronological data for the Airport East trench site, West Valley fault zone, Salt Lake County, Utah This data release includes geochronological data for the Airport East trench site (40.795359°, -111.950438°) on the Taylorsville fault of the West Valley fault zone (WVFZ). The WVFZ comprises intrabasin faults in the hanging wall of the Wasatch fault zone in the northern part of Salt Lake Valley, Utah. Samples for radiocarbon and luminescence dating were collected from two paleoseismic trenches in August–September 2015. Laboratory data include four optically stimulated luminescence ages and 14 radiocarbon ages for charcoal extracted from bulk sediment samples. This database has been approved for release by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geomorphology, Salt Lake City, Salt Lake Valley, Sedimentology, Seismology, All tags... Structural Geology, USGS Science Data Catalog (SDC), Utah, age estimation methods, carbon-14 analysis, geochronology, luminescence dating, Fewer tags Marsh shorelines of the Massachusetts coast from 2013-14 topographic lidar data The Massachusetts Office of Coastal Zone Management (CZM) launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the Massachusetts coast. Seventy-six maps were produced in 1997 depicting a statistical analysis of shoreline change on ocean-facing shorelines from the mid-1800s to 1978 using multiple data sources. In 2001, a 1994 shoreline was added. More recently, in cooperation with CZM, the U.S. Geological Survey (USGS) delineated a new shoreline for Massachusetts using color aerial ortho-imagery from 2008 to 2009 and topographic lidar data collected in 2007. This update included a marsh shoreline, which was defined to be the tonal difference between low- and high-marsh seen in ortho-photos.... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bourne, CMGP, Chatham, Coastal and Marine Geology Program, Duxbury, All tags... Essex, Fairhaven, Ipswich, Kingston, LIDAR, Land Use Change, Little Bay, MA, Marine Geology, Marion, Marsh Platform, Marshfield, Massachusetts, Mattapoisett, NOAA, National Assessment of Shoreline Change Project, National Oceanic and Atmospheric Administration, Pleasant Bay, Plum Island, Plymouth, Pocasset, Quincy, Rock Island Cove, Sandwich, Shoreline, Squantum, Structural Geology, U.S. Geological Survey, USGS, WHCMSC, Wareham, Wellfleet, Woods Hole Coastal and Marine Science Center, coastal processes, coastal submergence, elevation, environment, geomorphology, geoscientificInformation, marsh, marsh edge, marsh shoreline, oceans, shore, topography, Fewer tags Earthquake geology inputs for the U.S. National Seismic Hazard Model (NSHM) 2023 (western US) (ver. 2.0, February 2022) Version 3.0 is now available. Please see new data release here: https://doi.org/10.5066/P9AWINWZ. This Data Release contains preliminary versions of two related databases: 1) A fault sections database (“NSHM23_FSD_v2”), which depicts the geometry of faults capable of hosting independent earthquakes, and 2) An earthquake geology site information database (“NSHM23_EQGeoDB_v2”), which contains fault slip-rate constraints at points. These databases were prepared in anticipation of updates to the National Seismic Hazard Model (NSHM) 2023. Fault-specific geologic parameters for the NSHM have not been updated since the 2014 NSHM release. The datasets include the states of Washington, Oregon, California, Idaho, Nevada,... Categories: Data, Data Release - Revised; Tags: Arizona, California, Colorado, Geomorphology, Idaho, All tags... Montana, Nevada, New Mexico, Oregon, Structural Geology, Texas, USGS Science Data Catalog (SDC), Utah, Washington, Wyoming, earthquake, fault, slip rate, western United States, Fewer tags 1 2 »