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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 Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2020-2021 High-resolution mapping surveys The dataset documents the spatial and temporal variability of nutrients, phytoplankton, and related water quality parameters at high spatial resolution in the Sacramento-San Joaquin River Delta and Suisun Bay of California, USA. The dataset includes nitrate, ammonium, orthophosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition. Data were collected under different environmental/flow conditions in June, July, August, and October of 2020, and May, July, and October of 2021. The data release consists of a .xml document, and .txt and shapefile documents. Descriptions for each document and file are listed in the... Categories: Data; Tags: Aquatic Biology, California, Central Valley, Ecology, Geochemistry, All tags... Hydrology, Liberty Island, Sacramento River, Sacramento-San Joaquin Delta, Suisun Bay, USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, biogeochemistry, biota, delta, drinking water use, environment, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, visualization methods, water quality, water quality, Fewer tags Data sets for: Status of Water Quality in Groundwater Resources Used for Drinking-Water Supply in the Southeastern San Joaquin Valley, 2013-2015 - California GAMA Priority Basin Project This data release contains site information and potential explanatory factor data for 1,899 groundwater sites. These sites were used to assess groundwater quality in aquifers used for domestic and public drinking water supply in the southeastern San Joaquin Valley. The southeastern San Joaquin Valley (SESJV) study unit consists of five study areas whose boundaries are defined by the eponymous California Department of Water Resources groundwater subbasins of the San Joaquin Valley groundwater basin: Madera-Chowchilla, Kings, Kaweah, Tule, and Tulare Lake. The sites consist of 198 wells representing the domestic-supply aquifer and 1,701 wells representing the public-supply aquifer. The domestic-supply aquifer wells... Categories: Data; Tags: Central Valley aquifer system, Fresno, Hydrology, Kings, Land Use Change, All tags... Madera, Soil Sciences, Tulare, USGS Science Data Catalog (SDC), Water Quality, domestic well water use, environment, geoscientificInformation, groundwater quality, inlandWaters, Fewer tags High-resolution airborne magnetic survey of the Republic Graben, Okanogan and Kettle metamorphic core complexes, Kootenay Arc and surrounding regions, Northeastern Washington This release includes aeromagnetic data collected via low-altitude helicopter flown over northeastern Washington State, centered over the town of Republic, Washington. The data were acquired between September 26, 2022 and August 21, 2023 by Precision Geosurveys, Inc. of Langley, British Columbia and processed by EDCON-PRJ, Inc. of Lakewood, Colorado, contracted by the U.S. Geological Survey and funded through the Earth Mapping Resources Initiative (EarthMRI). The survey includes gridded data from target altitude of 80-100 meters above ground level, subject to aircraft climb and descent limitations. Primary transverse flight lines were flown in the east-west direction and spaced 200 meters apart. Tie lines were flown... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Earth Mapping Resources Initiative, EarthMRI, Economic Geology, GMEG, Geology, Minerals, Energy, and Geophysics Science Center, All tags... MRP, Mineral Resources, Mineral Resources Program, NCGMP, National Cooperative Geologic Mapping Program, Sedimentology, Structural Geology, U.S. Geological Survey, USGS, United States, Washington, aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, magnetic field (earth), potassium, thorium, uranium, Fewer tags Geomorphic attributes of campsites adjacent to the Colorado River in Grand Canyon, AZ (Provisional Release) This dataset represents 505 campsites along the Colorado River in Grand Canyon with associated debris flow probabilities calculated for approximately a 100-year period (Griffiths and others, 2004) and geomorphic attributes mapped by the U.S. Geological Survey, Grand Canyon Monitoring and Research Center (USGS-GCMRC) (Hadley and others, 2018). The campsite polygons were developed as part of a master campsite database that was a collaborative effort to maintain between the National Park Service in Grand Canyon National Park and the USGS-GCMRC. Debris flow probabilities have been added as an attribute from ungauged tributary watersheds published in 2004 (Griffiths and others, 2004). Area and percentages of campsites... Categories: Data, Data Release - In Progress, Data Release - Provisional; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arizona, Colorado River, Glen Canyon, Glen Canyon National Recreation Area, Grand Canyon, All tags... Grand Canyon National Park, Marble Canyon, USGS:6616a79bd34e7eb9eb7d647a, backcountry, boundaries, campsite, cartography, data release, digitization, earth sciences, geography, geomorphic units, geomorphology, geoscientificInformation, geospatial datasets, inlandWaters, land surface characteristics, landslides, recreation, river systems, slope processes, study areas, Fewer tags Optical measurements for surface water samples collected within the Neshaminy Creek basin during November 2021 Here we report optical data collected as part of a collaborative study between USGS Pennsylvania Water Science Center, Pennsylvania Department of Environmental Protection and Water Mission Area Proxies Project. The optical measurements reported here were collected to aide in the characterization of water sources and mixtures and establish proxies (surrogates) for per- and poly-fluorinated alkyl substances within the Neshaminy Creek basin. Data are compiled into three tables: 1) full fluorescence spectra in vectorized format, 2) full absorbance spectra, and 3) summary file of commonly extracted optical indicators and field-based sensor arrays. Categories: Data; Tags: California, California Water Science Center, Environmental Health, Geochemistry, Organic Matter Research Lab, All tags... Sacramento, TDN, USGS Science Data Catalog (SDC), Water Quality, Water Resources, absorbance, environment, fDOM, fluorescence, organic matter, total dissolved nitrogen, water quality, Fewer tags Estimated bedload transport rates at Rio Vista and Jersey Point, California, 2011-2020 This data set contains estimates of bedload transport entering San Francisco Bay from the Sacramento-San Joaquin Delta. Bedload was estimated following the methods of van Rijn (1984) for the Sacramento River at Rio Vista (USGS 11455420) and the San Joaquin River at Jersey Point (USGS 11337190). The inputs the van Rijn (1984) equations included:bed-material particle size, bed-form dimensions, depth, and velocity. Bedload was estimated at 15-minute intervals from Water Year 2011 through Water Year 2020. A "low range" estimate and a "high range" estimate were made. The low-range estimate assumes plane bed conditions and uses only grain size to estimate a hydraulic roughness parameter. The high-range estimate incorporates... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geomorphology, Hydrology, Sedimentology, USGS Science Data Catalog (SDC), Water Quality, All tags... Water Resources, hydrology, oceans, sediment transport, Fewer tags NHM input and output These datasets are created during the irrigation reanalysis workflow (irrigation_reanalysis.zip). The actet_openet.cbh, potet_openet.cbh, and dyn_ag_frac.param area created during step one of the workflow when converting daily OpenET/SSEBop results into input for the NHM. The nhm_2000_2020_ag_irrigation_add.csv, and nhm_2000_2020_ag_irrigation_add_vol.csv area estimated daily results output by the NHM. Categories: Data; Tags: Conterminous United States (CONUS), evapotranspiration, irrigation, landuse, water use Debris flow probabilities of ungaged tributaries to the Colorado River in Grand Canyon, AZ (Provisional Release) This dataset represents 740 tributary canyons and/or watersheds adjacent to the Colorado River in Grand Canyon with associated debris flow probabilities from 2004. Also, these data include tributarys canyon and/or watersheds to Glen Canyon and several smaller watersheds in Grand Canyon where debris flow data is currently unavailable. Historic probabilities of debris flow occurrence were estimated by modeling the known frequency distribution with drainage basin parameters observed to control the process by which debris flows initiate and travel to the river. Observations from 1984 through 2003 provide a 20-year record of all debris flows that reached the Colorado River in Grand Canyon, and repeat photography provides... Categories: Data, Data Release - In Progress, Data Release - Provisional; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arizona, Colorado River, Glen Canyon Dam, Grand Canyon, USGS:65c3d3b3d34ef4b119cae721, All tags... boundaries, canyon, data release, debris fan, debris flow, digitization, earth sciences, geography, geomorphology, geoscientificInformation, geospatial datasets, ground failure, inlandWaters, land surface characteristics, landslide susceptibility assessment, landslides, rapids, river systems, slope failure, slope processes, tributary, watershed, Fewer tags Fluorescence sensor measurements in sediment suspensions to evaluate turbidity corrections The use of field-deployable fluorescence sensors to better understand dissolved organic matter concentrations and composition has grown immensely in recent years. Applications of these sensors to critical monitoring efforts have also grown to encompass post-fire monitoring, wastewater tracking, and use as a proxy for various contaminants. Despite the growth, it is well known that these sensors are subject to various interferences and require corrections for temperature, turbidity, and concentration effects. Although temperature corrections are widely applicable across sensors, the turbidity and concentration corrections can be site-specific and/or sensor-specific. The corrections can even be subject to changes in... Categories: Data; Tags: DOC, USGS California Water Science Center, USGS Science Data Catalog (SDC), Water Quality, biota, All tags... continuous monitoring, dissolved organic carbon, fDOM, fluorescence, high frequency, in situ, optical sensor, organic matter, standard solution, turbidity, water quality, Fewer tags High-resolution airborne radiometric survey of the Republic Graben, Okanogan and Kettle metamorphic core complexes, Kootenay Arc and surrounding regions, Northeastern Washington This release includes aeroradiometric data collected via low-altitude helicopter flown over northeastern Washington State, centered over the town of Republic, Washington. The data were acquired between September 26, 2022 and August 21, 2023 by Precision Geosurveys, Inc. of Langley, British Columbia and processed by EDCON-PRJ, Inc. of Lakewood, Colorado, contracted by the U.S. Geological Survey and funded through the Earth Mapping Resources Initiative (EarthMRI). The survey includes gridded data from target altitude of 80-100 meters above ground level, subject to aircraft climb and descent limitations. Primary transverse flight lines were flown in the east-west direction and spaced 200 meters apart. Tie lines were... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Earth Mapping Resources Initiative, EarthMRI, Economic Geology, GMEG, Geology, Minerals, Energy, and Geophysics Science Center, All tags... MRP, Mineral Resources, Mineral Resources Program, NCGMP, National Cooperative Geologic Mapping Program, Sedimentology, Structural Geology, U.S. Geological Survey, USGS, United States, Washington, aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, magnetic field (earth), potassium, thorium, uranium, Fewer tags Croton setiger predators, herbivores, and damage collected in California 2013-2014 A pollen addition experiment was conducted on the leaves of Croton setiger, a Californian forb. Pollen was added to leaves of randomly selected plants, and control plants had no pollen added. Over 2013 and 2014 the number of predatory and herbivorous insects were counted on each plant, and the number of damaged leaves and plant size were measured. Categories: Data; Tags: California, Croton setiger, USGS Science Data Catalog (SDC), biota, herbivory, All tags... indirect defense, insects, plant defense, pollen, Fewer tags Three-component nodal recordings of aftershocks from the 15 May 2020 Mw 6.5 Monte Cristo, Nevada earthquake In May of 2020, the U.S. Geological Survey responded to the M6.5 Monte Cristo Range Earthquake, occurring near Tonopah, Nevada: https://www.usgs.gov/news/featured-story/m65-monte-cristo-range-earthquake. 60 DTCC SmartSolo 3-component nodal seismograph systems ("nodes") were deployed in the area and continuously recorded seismic data for about a month. Nodes were deployed in various arrays including a square grid, circular grid, linear array, and near 2 permanent strong-motion instruments. This report provides the metadata needed to analyze the seismic data. Categories: Data; Tags: Nevada, Seismology, USGS Science Data Catalog (SDC), earthquakes, faulting (geologic), All tags... hazards, seismic methods, seismic reflection methods, seismic refraction methods, seismology, Fewer tags Aeromagnetic and derivative gridded data, and magnetization boundaries of northeastern California This data release contains gridded aeromagnetic data from a dataset that merges two aeromagnetic surveys of northeastern California. Data from the Alturas and Burney surveys were gridded and merged to provide a continuous, detailed aeromagnetic dataset of the region. The merged dataset was then corrected for the inclination of the Earth's magnetic field (reduced to pole or rtp); match-filtering of the merged rtp gridded dataset provides three dipole-equivalent source layers at 0.85 km (shallow), 3.28 km (medium), and 16.4 (deep) km. Magnetization boundaries were calculated using the maximum horizontal gradient method on the match-filtered gridded data. Lastly, a magnetic field caused by magnetic terrain was calculated... Categories: Data; Tags: Alturas, Canby, Geophysics, USGS Science Data Catalog (SDC), aeromagnetic surveying, All tags... crust (earth), earthquakes, geoscientificInformation, magnetic anomaly, magnetic field (earth), magnetometer measurement, neotectonic processes, Fewer tags Pharmaceutical Data from the California Groundwater Ambient Monitoring and Assessment Priority Basin Project (GAMA-PBP) Domestic Well Groundwater Quality Studies, 2014 - 2021 The U.S. Geological Survey collected groundwater samples from 537 domestic wells for pharmaceutical compounds between 2014 and 2021 from 9 different study units. These wells were sampled as part of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic drinking water supply. The 9 study units are in parts of the San Joaquin Valley, Sacramento Valley, Sierra Nevada Foothills, and the Southern California Desert basins where domestic wells are extensively used for drinking water supply. The well selection for the study units were selected by using a grid-based approach... Categories: Data; Tags: California, Censored, GAMA-PBP, Groundwater Ambient Monitoring and Assessment Program Priority Basin Project, Pharmaceuticals, All tags... USGS Science Data Catalog (SDC), United States, Water Quality, datasets, dissolved organic compounds, environment, groundwater, groundwater quality, laboratory methods, Fewer tags Compiled onshore and offshore paleoseismic data along the Cascadia Subduction zone The USGS Powell Center Cascadia earthquake hazards working group compiled published onshore and offshore paleoseismic data along the Cascadia subduction zone, spanning sites from Vancouver Island to the Mendocino triple junction. Evidence for megathrust rupture includes coastal land-level change, tsunami inundation, onshore shaking proxies such as landslides or liquefaction, and offshore shaking proxies such as marine turbidites. The quality of paleoseismic data for megathrust rupture along the Cascadia subduction zone collected over the past three decades varies because analytical capabilities and data collection methodologies have evolved. Thus, as part of the compilation, we also present a ranking scheme to assess... Categories: Data; Tags: Aquatic Biology, British Columbia, California State, Cascadia subduction zone, Ecology, All tags... Geomorphology, Marine Geology, Oregon State, Sedimentology, Seismology, Stratigraphy, USGS Science Data Catalog (SDC), Washington State, earthquake, economy, lacustrine turbidite, landslide, liquefaction, marine turbidite, paleoseismic, subsidence, tsunami, Fewer tags High-resolution seismic imaging data acquired in 2021 across the West Winters Fault, Great Valley Fault System at Bigelow Hills, Yolo County, California In June of 2021, the U.S. Geological Survey conducted a high-resolution seismic survey at Winters, California. Seismic data were acquired using a DTCC SmartSolo 3-component nodal seismograph system ("node"), which continuously recorded at 2000 samples per second. Nodes were deployed 5 meters apart from west-southwest to east-northeast to create an approximately 800-m-long linear profile. P-wave data were generated primarily using a 500-lb (227-kg) accelerated weight drop at each recording station. In areas of difficult access, P-wave data were generated using a sledgehammer striking a steel plate. S-wave data were generated using a sledgehammer horizontally striking an aluminum block anchored to the ground. Every... Categories: Data; Tags: Seismology, USGS Science Data Catalog (SDC), Winters, earthquakes, faulting (geologic), All tags... hazards, seismic methods, seismic reflection methods, seismic refraction methods, seismology, Fewer tags Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2017-2020 Zooplankton samples were collected at a site in the Yolo Bypass in Northern California and at a comparison site on the Sacramento River below the city of Sacramento and analyzed for a large suite of current-use pesticides and degradates. Samples were collected biweekly in the summer/fall 2017 and 2018, and from May 2019−March 2020. Samples were collected by towing a 150-micron conical plankton net for 5 minutes by boat at each site. In the laboratory, zooplankton samples were filtered through a 63-micrometer sieve to separate the zooplankton and vegetation/detritus from the water. Large sticks, twigs, rocks, and leaves were rinsed with organic free water into the sieve and then discarded. The remaining mass in the... Categories: Data; Tags: California, Environmental Health, Hydrology, Sacramento, USGS Science Data Catalog (SDC), All tags... Water Quality, Zooplankton, environment, pesticide and herbicide contamination, Fewer tags Laboratory fluorescence and total dissolved nitrogen measurements for surface water samples collected from the Rio Grande during a 24-hr time period near Albuquerque, New Mexico Here, we present data supporting temporal variability and sources of PFAS in the Rio Grande through an arid urban area using high-frequency sampling and novel samplers. Data are compiled into two tables: 1) full fluorescence spectra in vectorized format, and 2) summary file of concentrations of total dissolved nitrogen and commonly extracted field-based sensor arrays. Data are reported from two sites at Rio Grande, New Mexico during a 24-hour collection period. Two field blanks, one field replicate, and two laboratory replicates are reported for 26 environmental samples. Categories: Data; Tags: California, Organic Matter Research Lab, Sacramento, TDN, USGS Science Data Catalog (SDC), All tags... Water Quality, continuous monitoring, environment, fDOM, fluorescence, high frequency, in situ, optical sensor, organic matter, total dissolved nitrogen, water quality, Fewer tags Stability testing results for stock solutions to standardize calibration of field fluorescence sensors Optical sensors measuring fluorescence of dissolved organic matter (fDOM) are increasingly used in water quality studies because they provide proxy measurements for a variety of contaminants and constituents of concern including metals and wastewater effluent. Similarly, sensors measuring fluorescence of chlorophyll (fChl) and phycocyanin (fPC) have gained popularity to measure phytoplankton concentration, biomass, and even primary productivity. Optical sensors require calibration using a calibration standard solution which is diluted from a working stock solution. However, preparation of stock solutions is challenging because they are difficult to prepare accurately, need to be prepared in a laboratory setting,... Categories: Data; Tags: California, California Water Science Center, Organic Matter Research Lab, Sacramento, USGS Science Data Catalog (SDC), All tags... Water Quality, algae, calibration, chlorophyll, environment, fDOM, fluorescence, optical sensor, organic matter, phycocyanin, standard solution, water quality, Fewer tags 1 2 »