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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Presumptive sources and relative heat index of 6PPD-quinone at the NHDPlus HR scale in the Delaware River Basin Presumptive sources and relative heat index of 6PPD-quinone at the NHDPlus HR scale in the Delaware River Basin
Geospatial datasets of sources and landscape characteristics expected to contribute 6PPD-quinone, a compound intended to increase the life span of tires, to surface waters were acquired and integrated into a relative heat index framework across the Delaware River Basin. 6PPD-quinone is known to be the cause of coho salmon (Oncorhynchus kisutch) kills following storm events, and recent...
Presumptive sources and relative heat index of 6PPD-quinone at the NHDPlus HR scale in the Chesapeake Bay Watershed Presumptive sources and relative heat index of 6PPD-quinone at the NHDPlus HR scale in the Chesapeake Bay Watershed
Geospatial datasets of sources and landscape characteristics expected to contribute 6PPD-quinone, a compound intended to increase the life span of tires, to surface waters were acquired and integrated into a relative heat index framework across the Chesapeake Bay Watershed. 6PPD-quinone is known to be the cause of coho salmon (Oncorhynchus kisutch) kills following storm events, and...
Catch of larval Grass Carp in light traps and intensity of light from light sticks Catch of larval Grass Carp in light traps and intensity of light from light sticks
Reproducing Grass Carp populations are not desired in many natural environments in the United States. Determining if reproduction is occurring, and linking reproduction to adult fish, requires capturing larval Grass Carp. A 4x4 Latin-square design was used to assess efficacy of four different light colors at capturing larval Grass Carp in quatrefoil light traps. The experiments were...
2015-2017 digital elevation models of karst areas in Puerto Rico at 3-meter resolution 2015-2017 digital elevation models of karst areas in Puerto Rico at 3-meter resolution
This raster dataset contains 3-meter digital elevation models (DEMs) of 7.5 minute quadrangles in karst areas of Puerto Rico and was created using GlobalMapper v.23 software. These DEMs were derived from 1-meter DEM tiles acquired through the USGS 3D Elevation Program (3DEP). The data are projected in North America Datum (NAD) 1983 (2011) UTM Zone 19N.
Database for the Preliminary Map of the Surface Rupture from the August 9, 2020, Mw 5.1 Earthquake Near Sparta, North Carolina-The Little River Fault and Other Possible Coseismic Features Database for the Preliminary Map of the Surface Rupture from the August 9, 2020, Mw 5.1 Earthquake Near Sparta, North Carolina-The Little River Fault and Other Possible Coseismic Features
This publication is a preliminary map and geodatabase of the coseismic surface rupture and other coseismic features generated from the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina. Geologic mapping facilitated by analysis of post-earthquake quality level 0 to 1 lidar, document the coseismic surface rupture, named the Little River fault, and other coseismic features. The...
Database for the Preliminary Map of the Surface Rupture from the August 9, 2020, Mw 5.1 Earthquake Near Sparta, North Carolina-The Little River Fault and Other Possible Coseismic Features Database for the Preliminary Map of the Surface Rupture from the August 9, 2020, Mw 5.1 Earthquake Near Sparta, North Carolina-The Little River Fault and Other Possible Coseismic Features
This publication is a preliminary map and geodatabase of the coseismic surface rupture and other coseismic features generated from the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina. Geologic mapping facilitated by analysis of post-earthquake quality level 0 to 1 lidar, document the coseismic surface rupture, named the Little River fault, and other coseismic features. The...
High-resolution geophysical data collected along the Mississippi River Delta Front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2024-015-FA High-resolution geophysical data collected along the Mississippi River Delta Front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2024-015-FA
High resolution sea-floor bathymetry, backscatter, and sound velocity profile data were collected offshore of southeastern Louisiana aboard the research vessel Thomas O'Brien on September 14-18, 2024 as part of an effort to characterize mudflow hazards on the Mississippi River Delta Front. The survey was the third field program of the Offshore Analysis of Seafloor Instability and...
High-resolution geophysical data collected along the Mississippi River Delta Front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2023-003-FA High-resolution geophysical data collected along the Mississippi River Delta Front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2023-003-FA
High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Pelican on September 4-29, 2023, as part of an effort to characterize mudflow hazards on the Mississippi River Delta Front. The survey was the third field program of the Offshore Analysis of Seafloor Instability and Sediments (OASIS)...
High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2022-004-FA High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2022-004-FA
High resolution bathymetric, sea-floor backscatter, water column, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Pelican on September 9 - 22, 2022, as part of an effort to characterize mudflow hazards on the Mississippi River Delta Front. The survey was the second field program of the Offshore Analysis of Seafloor Instability and...
Soil and groundwater concentrations of PFAS, soil properties, and derived soil-water distribution coefficients for sites in Maine Soil and groundwater concentrations of PFAS, soil properties, and derived soil-water distribution coefficients for sites in Maine
The U.S. Geological Survey (USGS) derived soil-water distribution coefficients (Kd values) from per- and polyfluoroalkyl substances (PFAS) analytical chemistry data and soil properties based on soil and groundwater samples collected by the Maine Department of Environmental Protection between 2019 and 2024. Samples were collected at agricultural biosolid application sites in Maine. At...
Nodal Seismometer Recordings along a San Francisco Peninsula DAS array, Stanford to Redwood City, California Nodal Seismometer Recordings along a San Francisco Peninsula DAS array, Stanford to Redwood City, California
In February 2026, the U.S. Geological Survey deployed a nodal seismometer array along a portion of a distributed acoustic sensing (DAS) array extending from Stanford to Redwood City, California. Seismic data were acquired using 33 DTCC SmartSolo, IGU-16HR 3-component nodal seismometers ("nodes"), which continuously recorded for approximately one month. By combining the DAS observations...
Nodal Seismometer Recordings of Aftershocks of the 5 May 2023 M 5.5 Lake Almanor, California Earthquake Sequence Nodal Seismometer Recordings of Aftershocks of the 5 May 2023 M 5.5 Lake Almanor, California Earthquake Sequence
At 4:19 pm local time on 11 May 2023, a M 5.5 earthquake occurred beneath Lake Almanor, California, located in Lassen National Forest about 180 km north-northeast of Sacramento, California. Shortly afterward, the United States Geological Survey deployed 34 DTCC SmartSolo IGU-16HR nodal seismometers ("nodes") in the region surrounding Lake Almanor. Each node recorded 3-component motion...