Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Sorption Coefficients (Kd) for Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic acid (PFOS), and supporting soil properties at a 250-meter resolution, based on 30-meter resolution data from the Polaris Soils database Sorption Coefficients (Kd) for Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic acid (PFOS), and supporting soil properties at a 250-meter resolution, based on 30-meter resolution data from the Polaris Soils database
Per- and polyfluoroalkyl substances (PFAS) chemicals are known to strongly sorb onto soils when being transported downward through the vadose zone. The degree to which this sorption occurs depends on the length of the specific PFAS molecular chain and the properties of the soil. The properties with greatest influence on the soils PFAS sorption potential are percent silt and clay, and...
Detailed Mapping of the 1983 Borah Peak Earthquake Surface Rupture (Idaho, USA) Using a High-Resolution Digital Terrain Model Derived from 2019 Lidar Data Detailed Mapping of the 1983 Borah Peak Earthquake Surface Rupture (Idaho, USA) Using a High-Resolution Digital Terrain Model Derived from 2019 Lidar Data
In this work, we refined and expanded the coseismic surface rupture map of the 1983 M6.9 Borah Peak earthquake coseismic rupture mapping at a scale of 1:500. While earlier work (DuRoss et al., 2019; Bello et al., 2020, 2021) used structure-from-motion (SfM) methods to construct digital elevation models (DEMs) derived from small uncrewed aerial systems (sUAS or drone) imagery, the...
Whole-Rock Geochemistry for Eocene Volcanic Rocks of the Toutle 7.5-Minute Quadrangle, Washington Whole-Rock Geochemistry for Eocene Volcanic Rocks of the Toutle 7.5-Minute Quadrangle, Washington
This data release contains geochemical data for 52 rock samples collected by Russell C. Evarts and colleagues from 1992 to 1999 to support geologic mapping of the Toutle 7.5-minute quadrangle in southwest Washington. Fifty samples were analyzed in analytical laboratories of the U.S. Geological Survey (USGS) and three samples were analyzed at the Peter Hooper GeoAnalytical Laboratory at...
Effect of backwatering a streamgage weir on the passage performance of adult American Shad Effect of backwatering a streamgage weir on the passage performance of adult American Shad
In this dataset, there are four csv files that provide the raw fish behavior telemetry data and a single csv file that provides the processed velocity data.
Data for A 3-D Seismic Velocity Model for Cascadia with Shallow Soils & Topography, Version 1.7 Data for A 3-D Seismic Velocity Model for Cascadia with Shallow Soils & Topography, Version 1.7
This data release contains three netCDF4 files containing grid points of P- and S-wave seismic velocities in Cascadia. This model is an update to Stephenson et al. (2017) Open-File Report 2017-1152, and contains a newly added shallow soil model and optional user-specified topography. A description of the model and its development is provided in the associated Open-File Report. The grid...
Observations of offset from shallow aseismic slip on the Concord fault, San Francisco Bay Area, CA Observations of offset from shallow aseismic slip on the Concord fault, San Francisco Bay Area, CA
The Concord fault is an active strike-slip fault of the Pacific-North America plate boundary that runs through suburban eastern San Francisco Bay Area, Contra Costa County, CA, in the cities of Concord and Walnut Creek. Recent work has identified ongoing aseismic slip along the trace of the fault and clarified its location. The data presented here record evidence of tectonic offsets of...