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Slab2 - A Comprehensive Subduction Zone Geometry Model, Sumatra-Java Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Fourmile Canyon Wildfire Longitudinal Profile Data This dataset represents 25 parallel longitudinal profiles that were extracted from terrestrial lidar point clouds taken during six survey periods. The six lidar surveys were conducted between 7 October 2010 and 8 October 2013. Over that time a colluvial hollow eroded into a fluvial channel. The longitudinal profiles show the topography of the colluvial hollow for each survey period. The width of the original colluvial hollow was approximately 1.25 m, and a longitudinal profile was extracted every 5 cm for the entire length of the hollow, resulting in 25 parallel longitudinal profiles. These data can be used to observe the transition of the colluvial hollow to a fluvial channel and furthermore they show the development... Types: Citation; Tags: Fourmile Canyon, Colorado, GHSC, Geologic Hazards Science Center, LHP, LIDAR, All tags... Landslide Hazards Program, Soil Sciences, USGS, USGS Science Data Catalog (SDC), burned watershed, colluvial hollow, earth science, fluvial channel, landslide hazard, soil erosion, wildfire, wildfire hazard, Fewer tags ShakeMap – Earthquake Ground Motion and Shaking Intensity Maps ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes. These maps are used by federal, state, and local organizations, both public and private, for post-earthquake response and recovery, public and scientific information, as well as for preparedness exercises and disaster planning. Types: Citation; Tags: ANSS, Advanced National Seismic System, ComCat, Comprehensive Earthquake Catalog, Earth, All tags... Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, ShakeMap, USGS, disaster planning, earth science, earthquake hazard, geophysics, ground motion, post-earthquake recovery, post-earthquake response, preparedness exercises, real time monitoring, regional earthquake, regional seismic networks, seismic hazard, seismology, shaking intensity, tectonophysics, Fewer tags Slab2 - A Comprehensive Subduction Zone Geometry Model Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. ##### This distribution includes models of three-dimensional slab geometry under... Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... Geophysics, Seismology, USGS, USGS Science Data Catalog (SDC), earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Preliminary Determination of Epicenters (PDE) Bulletin The NEIC global earthquake bulletin is called the Preliminary Determination of Epicenters or PDE, and is one of many discrete products in the ANSS Comprehensive Catalog (ComCat). We use the word "Preliminary" for our final bulletin because the Bulletin of the International Seismological Centre is considered to be the final global archive of parametric earthquake data, in other words phase arrival (“pick”) times and amplitudes. Types: Citation; Tags: ANSS, Advanced National Seismic System, ComCat, Comprehensive Earthquake Catalog, Earth, All tags... Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, NEIC, National Earthquake Information Center, PDE, Preliminary Determination of Epicenters Bulletin, USGS, earth science, earthquake hazard, epicenter, geophysics, real time monitoring, seismic hazard, seismology, tectonophysics, Fewer tags Slab2 - A Comprehensive Subduction Zone Geometry Model, South America Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Slab2 - A Comprehensive Subduction Zone Geometry Model, Pamir Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags High-Precision Seismicity Catalog for the 2022 Hunga Tonga-Hunga Ha-apai Volcanic Eruption This is a catalog of precise relocations of earthquakes surrounding the 2022 Hunga Tonga-Hunga Ha-apai Volcanic Eruption. These were generated using using surface-wave double-difference measurements, and relative magnitudes were computed between events. For details of the methodology used to produce this catalog, and the interpretation of these data, see the Seismological Research Letter publication "High-Precision Characterization of Seismicity from the 2022 Hunga Tonga-Hunga Ha-apai Volcanic Eruption". Locations use the WGS 1984 Datum. One comma-separated table is provided in this data release, relocations.csv, which is a summary of the relocation magnitude analysis. It includes 18 columns: Column 1 (time):... Categories: Data, Data Release - In Progress; Tags: GHSC, Golden, Tonga, USGS, earthquake, All tags... earthquake hazards, relocation, seismic, Fewer tags Data Release for the 2018 Update of the U.S. National Seismic Hazard Model: Where, Why, and How Much Probabilistic Ground Motion Maps Changed This dataset presents where, why, and how much probabilistic ground motions have changed with the 2018 update of the National Seismic Hazard Model (NSHM) for the conterminous U.S. (CONUS) vs. the 2014 NSHM. In the central and eastern U.S., hazard changes are the result of updated ground motion models (further broken down by median and epistemic uncertainty, aleatory variability, and site effects models) and gridded seismicity models. In the western U.S., hazard changes are the result of updated ground motion models in four urban areas with deep sedimentary basins and gridded seismicity models. Probabilistic ground motion changes (2% in 50 years probability of exceedance for a firm rock site, VS30 = 760 m/s, NEHRP... Categories: Data; Tags: Conterminous U.S., EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... Geophysics, 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 IRIS DMC Data Services Products: EMTF, The Magnetotelluric Transfer Functions Magnetotelluric (MT) method is a branch of geophysics that employs very large-scale natural sources from the solar wind and lightning. Modern-day MT uses state-of-the-art instrumentation, data processing and analysis tools to provide valuable information about deep Earth structure, complimentary to that of seismic data. These days, MT data also serve as a primary resource for estimation of geomagnetically induced currents, hazardous to modern infrastructure. However, there is a real need to modernize deeply historic MT data formats to a common standard that is fully documented, platform-independent, extensible, and accessible to the broader community of geoscientists. In the past decade, we have led just such an... Tags: Earth, GHSC, Geologic Hazards Science Center, Geomagnetism Program, Magnetotelluric, All tags... USGS, space weather, Fewer tags Digital Surface Models for the northern 16 km of the 1983 Borah Peak earthquake rupture, northern Lost River fault zone (Idaho, USA) We present high-resolution (10-cm pixel) digital surface models (DSMs) generated for the northern 16 km of the surface rupture associated with the 1983 Mw 6.9 Borah Peak earthquake. These DSMs were generated using Agisoft Photoscan (and Metashape) image-based modeling software and low-altitude aerial photographs acquired from unmanned aircraft systems and a tethered balloon. DSM files consist of GeoTIFFs with georeferencing information stored in the file headers. Tags: Borah Peak, Idaho, DSM, EHP, Earthquake Hazards Program, GHSC, All tags... Geologic Hazards Science Center, Geophysics, Seismology, USGS, USGS Science Data Catalog (SDC), digital surface models, earth science, earthquake hazard, Fewer tags Slab2 - A Comprehensive Subduction Zone Geometry Model, Hellenic Arc Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Slab2 - A Comprehensive Subduction Zone Geometry Model, Caribbean Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Data Set S1 for "Coseismic Sackungen in the New Madrid Seismic Zone, USA" The New Madrid Seismic Zone presents significant seismic hazard to the central and eastern United States. We mapped newly-identified coseismic ridge-spreading features, or sackungen, in the bluffs east of the Mississippi River in western Tennessee. We use this mapping dataset in an accompanying manuscript to show that sackungen form during earthquakes on the Reelfoot fault and may fail in preferred orientations. Ultimately, these data can be used to infer fault source and mechanism and improve the paleoseismic record used in hazard models. Tags: EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Geophysics, All tags... Mississippi River, New Madrid Seismic Zone, Reelfoot fault, Seismology, Tennessee, USA, USGS, USGS Science Data Catalog (SDC), coseismic ridge-spreading features, earth science, earthquake hazard, fault, fault mechanism, fault source, hazard models, paleoseismic record, sackungen, Fewer tags Grids in support of the U.S. Geological Survey Thermal Model for Seismic Hazard Studies A 3D temperature model is constructed in order to support the estimation of physical parameters within the USGS National Crustal Model. The crustal model is defined by a geological framework consisting of various lithologies with distinct mineral compositions. A temperature model is needed to calculate mineral density and bulk and shear modulus as a function of position within the crust. These properties control seismic velocity and impedance, which are needed to accurately estimate earthquake travel times and seismic amplitudes in earthquake hazard analyses. The temperature model is constrained by observations of surface temperature, temperature gradient, and conductivity, inferred Moho temperature and depth, and... Tags: Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, Geophysics, NCM, All tags... Seismology, Stratigraphy, USGS, USGS National Crustal Model, USGS Science Data Catalog (SDC), United States, Fewer tags Field data used to support numerical simulations of variably-saturated flow focused on variability in soil-water retention properties for the U.S. Geological Survey Bay Area Landslide Type (BALT) Site #1 in the East Bay region of California, USA Field data used to support numerical simulations of variably-saturated flow focused on variability in soil-water retention properties for the U.S. Geological Survey Bay Area Landslide Type (BALT) Site #1 in the East Bay region of California, USA Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BALT-1, California, East Bay region, GHSC, Geologic Hazards Science Center, All tags... LHP, Landslide Hazards Program, USGS, USGS Science Data Catalog (SDC), United States, earth science, hydraulic conductivity, landslide hazard, numerical simulations of variably-saturated flow, permeameter, pore-water pressure, rainfall, soil-moisture, soil-suction, soil-water retention, Fewer tags An Open Repository of Earthquake-Triggered Ground-Failure Inventories Earthquake-triggered ground-failure, such as landsliding and liquefaction, can contribute significantly to losses, but our current ability to accurately include them in earthquake hazard analyses is limited. The development of robust and transportable models requires access to numerous inventories of ground failure triggered by earthquakes that span a broad range of terrains, shaking characteristics, and climates. We present an openly accessible, centralized earthquake-triggered ground-failure inventory repository in the form of a ScienceBase Community to provide open access to these data, and help accelerate progress. The Community hosts digital inventories created by both USGS and non-USGS authors. We present... Categories: Collection, Data; Tags: Earthquake, Earthquake Hazards, GHSC, GIS, Geologic Hazards Science Center, All tags... Global, Inventory, Landslide, Landslide Hazards, USGS, USGS Science Data Catalog (SDC), World, database, Fewer tags Data Release for Additional Period and Site Class Maps for the 2014 National Seismic Hazard Model for the Conterminous United States The 2014 update of the U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) for the conterminous United States (2014 NSHM; Petersen and others, 2014; https://pubs.usgs.gov/of/2008/1128/) included probabilistic ground motion maps for 2 percent and 10 percent probabilities of exceedance in 50 years, derived from seismic hazard curves for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral accelerations (SAs) with 5 percent damping for the National Earthquake Hazards Reduction Program (NEHRP) site class boundary B/C (time-averaged shear wave velocity in the upper 30 meters [VS30]=760 meters per second [m/s]). This data release provides 0.1 degree by 0.1 degree gridded seismic hazard curves,... Categories: Data Release - Revised; Tags: Conterminous U.S., EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... Geophysics, 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 Slab2 - A Comprehensive Subduction Zone Geometry Model, Manila Trench Region Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interface of subduction zones host our largest earthquakes, and are the only faults capable of M9+ ruptures. Despite these facts, our knowledge of subduction zone geometry - which likely plays a key role in determining the spatial extent and ultimately the size of subduction zone earthquakes - is incomplete. Here we calculate the three- dimensional geometries of all active global subduction zones. The resulting model - Slab2 - provides for the first time a comprehensive geometrical analysis of all known slabs in unprecedented detail. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: EHP, Earth, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... USGS, earth science, earthquake hazard, large earthquake ruptures, shallow megathrust interface, subduction zone, subduction zone geometry model, Fewer tags Hillslope hydrologic monitoring data following the 2009 Station Fire, Los Angeles County, California, November 2015 to June 2017 This data release includes time-series data from two monitoring stations in drainage basins burned in the 2009 Station Fire, Los Angeles County, California. Both stations are located near the upper boundary of their respective watershed and were installed to study the effects of vegetation recovery on hillslope hydrology and debris-flow occurrence. The coordinates of the Arroyo Seco site are 34°14'13.10"N, 118°11'44.72"W. The coordinates for the Dunsmore Canyon hillslope site are 34°15'54.27"N, 118°14'14.41"W. The data include 1-minute time series of rainfall, soil water content, soil temperature, and soil matric potential recorded at two locations at both stations: AS1, AS2, DC1, DC2. The two locations at each... Categories: Data; Tags: California, Environmental Health, Forestry, GHSC, Geologic Hazards Science Center, All tags... Geomorphology, Hydrogeology, LHP, Landslide Hazards Program, Los Angeles, Soil Sciences, USGS, USGS Science Data Catalog (SDC), United States, Water Resources, Fewer tags 1 2 3 4 »