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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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Current and near-future conditions of aquatic spatial data for use in ecological models in the United States Current and near-future conditions of aquatic spatial data for use in ecological models in the United States

To address increasing demand for ecological models of aquatic species that can inform the management of national freshwater resources, we leveraged manager input to develop suites of environmental data layers characterizing freshwater habitats for the contiguous United States. Using the National Hydrography Dataset, these new data cover lentic and lotic systems under current and near...
Authors
Grace C. Henderson, Peder Engelstad, Cameron J. Reimer, Shelby K. LeClare, Linnea S. Fraser, Demetra A. Williams, Keana S. Shadwell, Wesley M. Daniel, Ian A. Pfingsten, Catherine S. Jarnevich
By
Ecosystems Mission Area, Fort Collins Science Center

Ice sheet dynamics drive pronounced changes in the subsurface freshwater-saltwater interface Ice sheet dynamics drive pronounced changes in the subsurface freshwater-saltwater interface

Saltwater is migrating into freshwater aquifers globally with water quality and biogeochemical implications, yet saltwater intrusion in glaciated regions is sparsely investigated. Field observations suggest that groundwater head in glaciated systems is influenced by ice sheet forcings and provides evidence that seawater infiltrated into offshore aquifers during past deglaciation events...
Authors
Julia Guimond, Aaron Mohammed, Barret L. Kurylyk, Michelle A. Walvoord, Victor F. Bense
By
Water Resources Mission Area

Spatial and temporal geochemical variations of lava flows and tephra deposits from the December 2020 to September 2024 eruptions of Kīlauea volcano Spatial and temporal geochemical variations of lava flows and tephra deposits from the December 2020 to September 2024 eruptions of Kīlauea volcano

Kīlauea volcano underwent dramatic morphological changes in 2018. That year recorded the end of the 35-year-long eruption of Puʻuʻōʻō (1983–2018) and 10-year-long (2008–2018) Halemaʻumaʻu lava lake and emplacement of the ~4-month-long lower East Rift Zone lava flows that coincided with ~500 m of summit caldera collapse. Starting on December 20, 2020, eruptions resumed at Kīlauea’s summit...
Authors
Drew T. Downs, Kendra J. Lynn, Heather Brianne Winslow, Steven P. Lundblad, Meghann F.I. Decker
By
Volcano Hazards Program, Volcano Science Center

The U.S. Geological Survey 2025 Puerto Rico and U.S. Virgin Islands time-independent earthquake rupture forecast The U.S. Geological Survey 2025 Puerto Rico and U.S. Virgin Islands time-independent earthquake rupture forecast

We present the 2025 U.S. Geological Survey Puerto Rico and U.S. Virgin Islands (PRVI) time‐independent earthquake rupture forecast (ERF), developed for the 2025 update to the National Seismic Hazard Model (NSHM) for PRVI. The updated ERF improves upon a prior model from 2003, including an expanded fault inventory with slip‐rate estimates, updated seismicity catalogs, and refined...
Authors
Kevin Ross Milner, Alexandra Elise Hatem, Richard W. Briggs, Jessica Ann Thompson Jobe, Andrea L. Llenos, Andrew J. Michael, Allison Shumway, Edward H. Field, Kirstie Lafon Haynie
By
Geologic Hazards Science Center

Depositional interplay between the Ancestral Rocky Mountains and Ouachita–Marathon–Sonora orogenies: Insights from provenance records in the late Paleozoic Marfa Basin, West Texas, U.S.A. Depositional interplay between the Ancestral Rocky Mountains and Ouachita–Marathon–Sonora orogenies: Insights from provenance records in the late Paleozoic Marfa Basin, West Texas, U.S.A.

The Marfa Basin in West Texas is a late Palaeozoic synorogenic depocenter associated with regional deformation linked to the Ancestral Rocky Mountains (ARM) and Ouachita–Marathon–Sonora (OMS) orogenies in southwestern Laurentia. Basin strata range in age from Middle Pennsylvanian to the middle Permian and include the Cieneguita, Alta, Pinto Canyon, Rose Mine and Mina Grande Formations...
Authors
Sandra Juárez-Zúñiga, Daniel F. Stockli, Benjamin G. Johnson, Timothy F. Lawton
By
Energy Resources Program, Central Energy Resources Science Center

Dog attacks on wild desert tortoises: A risk model Dog attacks on wild desert tortoises: A risk model

We retrospectively compiled a database of 6,727 live, wild Agassiz's desert tortoises (Gopherus agassizii) and evaluated them for clinical signs of trauma to shell and limbs at 50 sites in the Mojave and Colorado (western Sonoran) deserts of California, USA, spanning the years 1977–2006. Our objectives were to 1) identify tortoises with severe trauma to shell, limbs, and gular horns...
Authors
Andrea S. Carlson, Kristin H. Berry, Jeremy S. Mack
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)
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