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Grain-size distributions of bed material samples collected from the Middle Channel of the St. Clair River Delta, Michigan, November 10, 2021 Grain-size distributions of bed material samples collected from the Middle Channel of the St. Clair River Delta, Michigan, November 10, 2021
The U.S. Geological Survey used a ponar sampler to collect bed material from the Middle Channel of the St. Clair River Delta on November 10, 2021. Three sediment samples were collected upstream of the artificial spawning reefs constructed in the Middle Channel and two on the reefs themselves.The bed sediment samples were dried and sieved at 1/2 phi increments to determine their grain...
Topobathymetric Digital Elevation Model (TBDEM) of the Milwaukee River Estuary, MIlwaukee, WI and adjacent terrestrial and Lake Michigan nearshore coastal areas Topobathymetric Digital Elevation Model (TBDEM) of the Milwaukee River Estuary, MIlwaukee, WI and adjacent terrestrial and Lake Michigan nearshore coastal areas
This topobathymetric digital elevation model (TBDEM) mosaic represents the topography and bathymetry for the Milwaukee River Estuary in Milwaukee, Wisconsin and adjacent terrestrial and Lake Michigan nearshore coastal areas. The TBDEM was produced in support of modeling and for developing a physical habitat framework to help with understanding the effects from multidirectional currents...
Digital elevation model of South Fork Toutle River, Mount St. Helens, based on June–July 1980 airborne photogrammetry Digital elevation model of South Fork Toutle River, Mount St. Helens, based on June–July 1980 airborne photogrammetry
The lateral blast, debris avalanche, and lahars of the May 18th, 1980, eruption of Mount St. Helens, Washington, dramatically altered the surrounding landscape. The eruption produced mudflows in the South Fork Toutle River basin, which drains the western slopes of the volcano. Orthophotography was acquired shortly after the eruption (June 19 and July 1). Survey extent includes South Fork...
Simulation and visualization of coastal tsunami impacts from the SAFRR tsunami source Simulation and visualization of coastal tsunami impacts from the SAFRR tsunami source
To further extend the scope of the Science Application for Risk Reduction (SAFRR) project, detailed hydrodynamic simulations were run at three harbor locations in California. For the locations of 1) Oakland/Alameda, 2) Half Moon Bay, and 3) Santa Cruz, simulations at approximately 5-m resolution were performed using the high-order Boussinesq-type model COULWAVE. The Oakland/Richmond...
High resolution earthquake relocations and focal mechanisms with preferred fault planes for the 2020 Maacama sequence High resolution earthquake relocations and focal mechanisms with preferred fault planes for the 2020 Maacama sequence
This page contains results from analysis of 2020 Maacama earthquake sequence, including the detected and relocated earthquake catalog along with associated focal mechanisms and preferred fault planes as derived in: Shelly, D. R., R. J. Skoumal, and J. L. Hardebeck, Fracture-mesh faulting in the swarm-like 2020 Maacama sequence revealed by high-precision earthquake detection, location...
Parameter Estimation, Uncertainty Analysis, and Optimization with the PEST++ Family of codes: Tutorial Jupyter Notebooks Parameter Estimation, Uncertainty Analysis, and Optimization with the PEST++ Family of codes: Tutorial Jupyter Notebooks
A series of Jupyter notebooks documenting a self-guided, interactive curriculum for the PEST++ family of software codes for uncertainty analysis, parameter estimation, and management optimization. For a currently maintained version of these materials, please visit https://github.com/gmdsi/GMDSI_notebooks.
Magnetotelluric data across the Southern San Andreas Fault Zone, California Magnetotelluric data across the Southern San Andreas Fault Zone, California
The Southern San Andreas fault (SSAF) poses one of the largest seismic risks in California. However, structural properties around Coachella Valley remain enigmatic. In 2019, we collected magnetotelluric soundings (MT) to help inform depth-dependent fault zone geometry, fluid content and porosity. This project was led by the Institute of Geophysics and Planetary Physics at the University...
ModelMuse Version 5.1: Software Release ModelMuse Version 5.1: Software Release
ModelMuse version 5.1 updates version 5.0 by adding support for the groundwater transport process and time series files in MODFLOW 6.
Molecular and morphological data for Channa aurolineata in Florida Molecular and morphological data for Channa aurolineata in Florida
We analyzed morphological and molecular data from one existing and one newly discovered population of 'bullseye' snakehead (Teleostei: Channidae) from Florida. Morphological and meristic data were collected from museum collections and compared with data from recent taxonomic revisions of related species in the 'Marulius' species group from southeast Asia. Additionally, we performed DNA...
Twelve-digit hydrologic unit total flow and snowmelt from the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System, 1980-2016 Twelve-digit hydrologic unit total flow and snowmelt from the National Hydrologic Model Infrastructure with the Precipitation-Runoff Modeling System, 1980-2016
This dataset is part of the National Water Census ongoing development of best estimates of daily historical water budgets for over 100,000 hydrologic units across the United States. In this release, estimates of total flow and snowmelt for each hydrologic unit are added to the already released estimates of actual evapotranspiration, snowpack water-equivalent storage, soil moisture...
Contemporary fire history metrics for the conterminous United States (1984-2024) (ver. 4.0, March 2025) Contemporary fire history metrics for the conterminous United States (1984-2024) (ver. 4.0, March 2025)
Fire history metrics enable rapidly increasing amounts of burned area data to be collapsed into a handful of data layers that can be used efficiently by diverse stakeholders. In this effort, the U.S. Geological Survey's Landsat Burned Area product was used to identify burned area across CONUS over a 41-year period (1984-2024). The Landsat BA product was consolidated into a suite of...
Reprocessed multichannel seismic reflection data acquired offshore Southern California during USGS field activity O-1-99-SC Reprocessed multichannel seismic reflection data acquired offshore Southern California during USGS field activity O-1-99-SC
Multichannel seismic (MCS) data were collected by the U.S. Geological Survey (USGS) in June of 1999 in the coastal zone and continental shelf between Los Angeles and San Diego, offshore California (USGS field activity O-1-99-SC). In 2021 these data were reprocessed to improve accuracy and resolvability of geologic structures and fault systems of California's continental margin.