Data

The U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program has actively collected geophysical and sedimentological data in the northern Gulf of America (Gulf of Mexico) for several decades, including shallow subsurface data in the form of high-resolution seismic reflection profiles (HRSP). Prior to the mid-1990s most HRSP data were collected in analog format as...

On 10 August 2025, a landslide in Tracy Arm, southeast Alaska, approximately 95 km southeast of Juneau, generated a tsunami with regional effects. Because of poor weather, low visibility, and inaccessible conditions in the water, little was immediately known about the landslide or the total extent and magnitude of the tsunami. On Wednesday, 13 August 2025, USGS scientists Cyrus Read and...

Grand Falls Dune Field (GFDF) on the Navajo Nation (70 km NE of Flagstaff, AZ) is an active, bimodal dune system in both grain size and composition. Felsic grains derive from the Little Colorado River, while mafic (basaltic) grains are sourced locally from nearby cinder cones, making GFDF an excellent terrestrial analog for dune fields on Mars, Venus, and Titan. A long‑term...

Metrics describing watershed hydrology, stream hydraulics, stream geomorphology, physicochemical processes, and aquatic biology were used to assess a 1.72 km reach of stream above the U.S. Geological Surveys (USGS) Flatlick Branch (station ID 01656903) monitoring station restored using natural channel design. The monitoring station has been continually operated since the start of water...

We used telemetry data from 55 trumpeter swans in the Rocky Mountain Population captured in summer and winter in the western United States to understand their migratory movements and use of habitats. This dataset includes telemetry data collected between October and March from 35 swans (5 swans captured in Oregon and 14 swans captured by Wyoming Wetlands Society are not included due to...

This data release contains the boundaries of assessment units, assessment input data, and resulting fact sheet data tables for the assessment of undiscovered conventional oil and gas resources of India and Sri Lanka. The assessment unit is the fundamental unit used in the National and Global Oil and Gas Assessment Project for the assessment of undiscovered oil and gas resources. The...

Multiple subaerial landslides adjacent to Prince William Sound, Alaska (for example, Dai and others, 2020; Higman and others, 2023; Schaefer and others, 2024) pose a threat to the public because of their potential to generate ocean waves (Barnhart and others, 2021, 2022; Dai and others, 2020) that could affect towns and marine activities. One bedrock landslide on the west side of Barry...

Groundwater salinity impacts water quality and limits usability for drinking, irrigation, and industrial purposes where salinity is high. Salinity is a measure of the mass of dissolved salts in a given volume of solution and is closely related to the concentration of Total Dissolved Solids (TDS) as well as the ability of water to conduct electricity, or specific conductance (SC)...

This dataset includes paleomagnetic analyses of lava samples from Kīlauea volcano, Island of Hawaiʻi. Analyses were performed using a cryogenic magnetometer in Menlo Park, California, USA. The data were collected as part of fundamental geologic mapping of the Southwest Rift Zone, East Rift Zone, summit, and south flank regions of Kīlauea volcano, Island of Hawaiʻi. These data (when...

This release includes data collected during campaign GNSS surveys at Kīlauea and Mauna Loa volcanoes on the Island of Hawaiʻi in 2025. It includes data from a total of 46 sites occupied from January 1 to August 15, 2025 (see note below). For each site, we include its measured raw data in daily files, Receiver INdependent EXchange (RINEX) files for each day, field log sheet(s), and...

The June 2023 Halema‘uma‘u eruption began on June 7 and ended on June 19 (~2 weeks; Mulliken et al. 2024). Field crews from the U.S. Geological Survey’s Hawaiian Volcano Observatory collected frothy pumice clasts from initial high fountaining on 7 June 2023 from accessible regions southwest of Kaluapele (Kīlauea’s summit caldera). Samples were collected from within a publicly closed area...

A series of hydrothermal frictional strength experiments was conducted on synthetic gouges prepared from five chlorite-rich samples of varying composition. We present chlorite mineral compositions obtained by electron microprobe techniques, and X-ray diffraction and bulk chemical analyses of the gouges that were prepared by hand-grinding each sample to less than 90-µm grain diameter...