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Broadband Ground Motion Simulations for 12 California Region Earthquakes This Data Release consists of broadband ground motion simulations for 12 California region earthquakes. The ground motion simulations were done as part of a validation study that is described in more detail in Graves (2022). These simulations were computed using a hybrid simulation methodology (hereafter referred to as GP). The GP approach is a hybrid in that separate responses are computed for the low- and high-frequency components, which are then summed together to produce the full broadband response. The 12 earthquakes considered in Graves, R.W. (2022). Using a Grid-Search Approach to Validate the Graves-Pitarka Broadband Simulation Method, Earth, Planets and Space, 74:186, doi: 10.1186/s40623-022-01742-y, are... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Geophysics, Seismology, USGS Science Data Catalog (SDC), biota, All tags... earthquakes, simulations, Fewer tags San Francisco Bay region 3D seismic velocity model v21.0 This three-dimensional (3D) seismic velocity model includes a detailed domain covering the greater San Francisco Bay urban region and a regional domain at a coarser resolution covering a larger region. Version 21.0 is a re-release of v08.3.0 in a new storage scheme. The model was constructed by assigning elastic properties (density, Vp, Vs, Qp, and Qs) to grids of points based on the geologic unit and depth from the ground surface. The model is stored in HDF5 files using the GeoModelGrids (https://geomodelgrids.readthedocs.io) storage scheme (see the README.md file for an overview). GeoModelGrids provides a high-level interface for accessing the model. The model can also be accessed using the HDF5 application programming... Tags: California, GHSC, Geophysics, Golden, San Francisco Bay, All tags... Seismology, USGS, USGS Science Data Catalog (SDC), earthquake, earthquake hazards, elastic properties, epicenter, plate tectonics, seismic, seismic velocity model, three dimensional model, Fewer tags Regional and Teleseismic Observations for Finite-Fault Product This data release complements the following publication: Goldberg, D. E., P. Koch, D. Melgar, S. Riquelme, and W. L. Yeck (2022). Beyond the Teleseism: Introducing Regional Seismic and Geodetic Data into Routine USGS Finite-Fault Modeling, Seismol. Res. Lett. XX, 1–16, doi: 10.1785/0220220047. Rapid finite-fault models are published by the US Geological Survey (USGS) National Earthquake Information Center (NEIC) routinely following large (M7+) earthquakes. Finite-fault models estimate the spatiotemporal evolution of heterogeneous slip across a fault. The type of data used as input to a finite-fault inversion affects the overall resolution of the model and the slip pattern itself. In the associated manuscript, we... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, California, Chile, GHSC, Geophysics, All tags... Golden, Haiti, Remote Sensing, Seismology, USGS, USGS Science Data Catalog (SDC), United States, biota, earthquake, finite fault, Fewer tags Influence of Lithostatic Stress on Earthquake Stress Drops in North America Earthquake stress drop is a critical parameter for estimating seismic hazard. This parameter can have a strong effect on ground motion amplitudes above ~1Hz and is especially important in Oklahoma and Kansas where earthquake rates have increased sharply since 2008. We estimate stress drops for 1121 earthquakes greater than ~M3 in and near the conterminous United States using spectral ratios between collocated events at given stations. We find that the average stress drop for the few eastern United States (EUS, 26–340 Bars) tectonic main shocks studied, which tend to be deeper thrusting events with few foreshocks and aftershocks, is about three times greater than tectonic main shocks in the western United States... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Brune stress drop, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Geophysics, All tags... Kansas, Mohr-Coulomb theory, North America, Oklahoma, Seismology, USGS, USGS Science Data Catalog (SDC), United States, earthquake, earthquake hazard, earthquake stress drop, geophysics, ground motion amplitude, high frequency shaking hazard, lithostatic stress, seismic hazard, seismology, shear failure stress, tectonic, Fewer tags Data from the manuscript: A Wideband Magnetoresistive Sensor for Monitoring Dynamic Fault Slip in Laboratory Fault Friction Experiments These data are the basis of the figures in the manuscript "A Wideband magnetoresistive sensor for monitoring dynamic fault slip in laboratory fault friction experiments". That report was the result of an investigation of a non-contact, wideband method of sensing dynamic fault slip in laboratory geophysical experiments which employs an inexpensive magnetoresistive sensor, a small neodymium rare earth magnet, and user built application specific wideband signal conditioning electronics. The magnetoresistive sensor generates a voltage proportional to the changing angles of magnetic flux lines, generated by differential motion or rotation of the near-by magnet, through the sensor. The performance of an array of these... Types: Citation; Tags: Geophysics, Menlo Park, Seismology, USGS Science Data Catalog (SDC), fracture (geologic), All tags... seismic methods, Fewer tags Results of individual and collocated lifeline exposure to hazards (and associated hazard and multi-hazard exposure surface data) resulting from the HayWired scenario earthquake sequence for counties and cities in the San Francisco Bay area, California These data are a summary of modeled exposure of various lifeline infrastructure linear features and facilities (transportation, water supply and wastewater, oil and gas, electric power, and telecommunications) to potential hazards resulting from the HayWired earthquake scenario, a magnitude 7.0 earthquake occurring on the Hayward Fault on April 18, 2018, with an epicenter in the city of Oakland, CA. Compilations of potential collocations between various lifeline infrastructure systems components (all lifeline components, transmission-level components only, distribution-level components only, more societally critical components only, and less societally critical components only) and their potential multi-hazard exposure... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, HayWired, San Francisco Bay area, Seismology, USGS Science Data Catalog (SDC), All tags... aftershocks, earthquakes, electric power, fire following earthquake, hazards, landslides, liquefaction, oil and gas, surface offset, telecommunications, transportation, wastewater, water supply, Fewer tags Data Release for the 2003 Puerto Rico and U.S. Virgin Islands Seismic Hazard Model Gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2003 Puerto Rico and U.S. Virgin Islands Seismic Hazard Model. Probabilistic seismic hazard data and maps are available for peak ground acceleration (PGA) and 0.2, 0.3, and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years and 10 percent in 50 years, assuming firm rock soil conditions at 760 m/s. Development of the 2003 Puerto Rico and U.S. Virgin Islands Seismic Hazard Model is documented at https://doi.org/10.1193/1.3277667 and https://pubs.usgs.gov/of/2003/ofr-03-379/ofr-03-379.html. This dataset is considered a legacy dataset. The original dataset was uploaded... Tags: EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Geophysics, All tags... NEHRP site classes, NSHM, NSHMP, National Seismic Hazard Model, National Seismic Hazard Model Project, Puerto Rico, Puerto Rico, Seismology, U.S. Seismic Hazard Maps, U.S. Virgin Islands, U.S. Virgin Islands, USGS, USGS Science Data Catalog (SDC), ground motion, hazard curve, hazard map, spectral period, Fewer tags Field reconnaissance of ground failure triggered by shaking during the 2018 M7.1 Anchorage, Alaska, earthquake These data present geolocated photographs, GPS tracks, and field-mapped ground failures collected during the USGS reconnaissance of ground failures following the 2018 M7.1 Anchorage Earthquake. Tags: Alaska, Anchorage, Geomorphology, Landslides, Liquefaction, All tags... Seismology, USGS Science Data Catalog (SDC), Fewer tags Finite Fault Models This folder contains an excel spreadsheet that details the earthquake source information (location, time, magnitude) and the associated finite fault models, allowing with the citation for each model. See "Finite Fault Model Metadata". Each of the referenced models are included in their original format, either .param, .fsp, or .rupt. Tags: Geophysics, Remote Sensing, Seismology 2017 U.S. Geological Survey/BC Hydro seismic data recorded at three dam sites on Vancouver Island, British Columbia, Canada In May 2017, we acquired high-resolution seismic profiles near three dam sites (Strathcona, Laodre and John Hart dams) located on Vancouver Island, British Columbia, Canada. Our goal was to measure seismic velocities (particularly Vs) at each dam site using body and surface waves. The data were analyzed using refraction tomography and multi-channel analysis of surface waves (MASW), especially in the upper 30 m of the subsurface. The analyzed data are presented in a separate report (Catchings and others, in review). We also recorded one hour of ambient noise (passive-source) data along most of the same profiles. This work was completed under the authority of a 2011 agreement relating to scientific and technical... Categories: Data; Tags: British Columbia, Seismology, USGS Science Data Catalog (SDC), Vancouver Island, earthquakes, All tags... faulting (geologic), hazards, seismic reflection methods, seismology, Fewer tags Data Release for the 2012 Guam and Northern Mariana Islands Seismic Hazard Model Gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2012 Guam and Northern Mariana Islands Seismic Hazard Model. Probabilistic seismic hazard data and maps of Guam and the Northern Mariana Islands for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404) and 10 percent in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Development of the 2012 Guam and Northern Mariana Islands Seismic Hazard Model is documented in the USGS Open-File Report 2012-1015 (https://pubs.usgs.gov/of/2012/1015/).... Tags: EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Geophysics, All tags... Guam and the Northern Mariana Islands, Guam and the Northern Mariana Islands, NEHRP site classes, NSHM, NSHMP, National Seismic Hazard Model, National Seismic Hazard Model Project, Seismology, U.S. Seismic Hazard Maps, USGS, USGS Science Data Catalog (SDC), ground motion, hazard curve, hazard map, spectral period, Fewer tags Field observations of ground failure triggered by the 2020 Puerto Rico earthquake sequence This dataset consists of over 800 field observations of ground failure (landslides, lateral spreading, and liquefaction) and other damage triggered by the 2019-2020 Puerto Rico earthquake sequence. The sequence started with a M4.7 earthquake on 28 December 2019, followed by many more earthquakes, including 15 larger than M5 (as of 7 July 2020). The M6.4 mainshock, which is thought to have triggered much of the observed ground failure, occurred on 7 January 2020. Most field reconnaissance efforts documented here took place as soon as possible after the mainshock, from 12-18 January 2020, to attempt to capture ephemeral data before evidence was destroyed by natural forces or repairs, but observations continued to... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Guayanilla, Guánica, All tags... Landslide Hazards Program, Peñuelas, Ponce, Puerto Rico, USGS, USGS Science Data Catalog (SDC), United States, earth science, earthquake hazard, geophysics, landslides, lateral spread, liquefaction, none, rock fall, seismic hazard, seismology, Fewer tags Data Release for the 2007 Afghanistan Seismic Hazard Model Gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2007 Afghanistan Seismic Hazard Model. Probabilistic seismic hazard data and maps of Afghanistan for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404), 5 percent in 50 years (annual probability of 0.001026), and 10 percent in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Development of the 2007 Afghanistan Seismic Hazard Model is documented in the USGS Open-File Report 2007-1137 (https://pubs.usgs.gov/of/2007/1137/index.html). This... Tags: Afghanistan, Afghanistan, EHP, Earthquake Hazards Program, GHSC, All tags... Geologic Hazards Science Center, Geophysics, NEHRP site classes, NSHM, NSHMP, National Seismic Hazard Model, National Seismic Hazard Model Project, Seismology, U.S. Seismic Hazard Maps, USAID, USGS, USGS Science Data Catalog (SDC), ground motion, hazard curve, hazard map, spectral period, 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 Earthquake catalog (1568 to 2018) for the USGS National Seismic Hazard Model and Nuclear Regulatory Commission The earthquake catalog was generated in August 2018 using the standard National Seismic Hazard Model methodology (Mueller, 2019) for the central and eastern United States. Pre-existing catalogs were merged, duplicate records were removed, the catalog was declustered, and induced earthquakes were removed. The final catalog contains 6802 records, M2.5–7.8, and extends from 1568 through July 2018. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Seismology, USGS Science Data Catalog (SDC), United States, catalog, earthquake occurrences, All tags... earthquakes, geoscientificInformation, hazard, location, seismology, Fewer tags High-resolution seismic imaging of the West Napa Fault Zone at Saintsbury Winery, Napa, California In November 2016, the U.S. Geological Survey acquired high-resolution P- and S-wave seismic data across the surface trace of the West Napa Fault zone at Saintsbury Winery in Napa, California. We acquired seismic reflection, refraction, and guided-wave data along a 115-m-long profile across the known surface rupture zone of the West Napa Fault zone. To acquire the reflection and refraction data, we co-located shots and geophones, spaced every meter along the profile. We used 116 SercelTM L40A P-wave (40-Hz vertical-component) geophones with a sensitivity of 22.34 volts/meter/second to record 116 P-wave shots. We also used 116 SercelTM L28-LBH S-wave (4.5-Hz horizontal-component) geophones with a sensitivity of... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Earthquake Hazards, Earthquakes, Faulting (geologic), Geophysics, Napa, All tags... Northern California, Seismology, Seismology, USGS Science Data Catalog (SDC), West Napa Fault Zone, seismic reflection and refraction, Fewer tags Supporting Data for "Subduction intraslab-interface fault interactions in the 2022 Mw 6.4 Ferndale, California, earthquake sequence" This data release pertains to the December 20, 2022, Mw 6.4 Ferndale, California, earthquake and complements the following publication: Shelly, D. R., D. E. Goldberg, K. Z. Materna, R. J. Skoumal, J. L. Hardebeck., C. E. Yoon, W. L. Yeck, and P. S. Earle (2024). Subduction intraslab-interface fault interactions in the 2022 Mw 6.4 Ferndale, California, earthquake sequence, Science Advances, https://doi.org/10.1126/sciadv.adl1226. This page contains: (1) Files pertaining to earthquake relocations, (2) Files pertaining to postseismic GNSS analysis, and (3) Input data and model results from the coseismic finite-fault inversions. See attached ReadMe.txt for details. The dataset includes broadband teleseismic data, regional... Categories: Data; Tags: California, Geophysics, Mendocino Triple Junction, Seismology, USGS Science Data Catalog (SDC), All tags... earthquake seismology, subduction, Fewer tags Advanced National Seismic System (ANSS) Comprehensive Catalog of Earthquake Events and Products The ANSS Comprehensive Catalog (ComCat) contains earthquake source parameters and other products produced by contributing seismic networks. Important digital catalogs of earthquake source parameters (e.g. Centennial Catalog, Global Centroid Moment Tensor Catalog) are loaded into ComCat. New and updated data are added to the catalog dynamically as sources publish or update products. Access to the ComCat is via the online search page, on which a user can select a wide variety of criteria to locate earthquake events of interest. Source Parameters: -amplitude - hypocenter - magnitude - phase data - finite fault - focal mechanism - moment tensor - tectonic summary - regional information Products: - Did You Feel It? -... Types: Citation; Tags: ANSS, Advanced National Seismic System, ComCat, Comprehensive Earthquake Catalog, DYFI, All tags... Did You Feel It, Did You Feel It?, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, PAGER, PDE, Preliminary Determination of Epicenter, Prompt Assessment of Global Earthquakes for Response, ShakeMap, USGS, USGS Science Data Catalog (SDC), earth science, earthquake hazard, earthquake scenarios, epicenter, finite fault, focal mechanism, geophysics, moment tensor, phase data, real time monitoring, regional earthquake, seismic hazard, seismology, tectonic summary, tectonophysics, Fewer tags Quaternary Fault and Fold Database of the United States The Quaternary Fault and Fold Database contains the results of thousands of scientific assessments of faults and associated folds in the United States that demonstrate geologic evidence for coseismic surface deformation in the Quaternary (the past 1,600,000 years). The Quaternary Fault and Fold Database includes information on the age of the most recent coseismic surface deformation, relative rates of activity, fault geometry, sense of movement, and citations of pertinent literature. Much of the information in the database is based on paleoseismology, which is the geologic study of prehistoric earthquakes. Paleoseismology combines well-established geologic practices such as trenching with archeological-style analysis... Types: Citation; Tags: Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, National Seismic Hazard Model, Quaternary, All tags... Seismology, USGS, USGS Science Data Catalog (SDC), United States, earth science, earthquake, earthquake hazard, fault, fault orientation, fault surface trace, fault type, fault-source characterization, fold, geologic interpretation, geologic setting, geologic structure, geophysics, hazard map, paleoseismology, prehistoric earthquake, recurrence interval, seismology, sense of movement, sense of slip, slip rate, surface faulting, trenching, Fewer tags Data Release for the 2023 U.S. 50-State National Seismic Hazard Model - Overview This data release contains data sets associated with the 2023 50-State National Seismic Hazard Model Update. The 2023 50-State National Seimsic Hazard Model (NSHM) Update includes an update to the NSHMs for the conterminous U.S (CONUS, last updated in 2018), Alaska (AK, last updated in 2007), and Hawaii (last updated in 2001). Data sets include inputs like seismicity catalogs used as input to the smoothed seismicity model and updated induced seismicity zone polygons in the central and eastern U.S., as well as outputs like hazard curves and uniform-hazard ground motion values. Plots of selected data sets are also included. The data sets provided here are primarily for the 2023 CONUS NHSM and 2023 AK NSHM. Additional... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Conterminous United States, Earthquake, Hawaii, Hazard, All tags... Map Service, National Seismic Hazard Model, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Seismic, Seismology, USGS Science Data Catalog (SDC), earthquake hazard, geophysics, seismology, Fewer tags « 1 ... 3 4 5 6 7 ... 9 »