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Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. They also organize, maintain, and publish the geospatial baseline of the Nation's topography, natural landscape, built environment and more.

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Groundwater potentiometric-surface altitude in 2022 and groundwater-level changes between 1968, 1991, and 2022, in the alluvial aquifer in the Big Lost River Valley, south-central Idaho

The U.S. Geological Survey and the Idaho Department of Water Resources measured groundwater levels during spring 2022 and autumn 2022 to create detailed potentiometric-surface maps for the alluvial aquifer in the Big Lost River Valley in south-central Idaho. Wells were assigned to shallow, intermediate, and deep water-bearing units based on well depth, groundwater potentiometric-surface altitude,
By
Water Resources Mission Area, Idaho Water Science Center

September 15, 2023 — Kīlauea summit thermal map compilation

This compilation shows thermal maps of the summit eruption for Sept. 11-15, 2023.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

September 15, 2023 — Kīlauea summit thermal maps

A helicopter overflight on September 15, 2023, allowed for aerial visual and thermal imagery to be collected at the summit of Kīlauea.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

September 14, 2023 — Kīlauea summit thermal maps

A helicopter overflight on September 14, 2023, allowed for aerial visual and thermal imagery to be collected at the summit of Kīlauea.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

September 14, 2023 — Kīlauea summit eruption reference map

The Kīlauea summit eruption that began on Sunday, September 10, 2023 continues; this map depicts lava flow activity as of September 14, the fourth full day of the eruption.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea, Kīlauea

September 12, 2023 — Kīlauea summit thermal maps

A helicopter overflight on September 12, 2023, allowed for aerial visual and thermal imagery to be collected at the summit of Kīlauea.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

September 11, 2023 — Kīlauea summit thermal maps

A helicopter overflight on September 11, 2023, allowed for aerial visual and thermal imagery to be collected at the summit of Kīlauea.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

September 11, 2023—Kīlauea summit eruption reference map

A new eruption at the summit of Kīlauea volcano began at approximately 3:13 p.m. on Sunday, September 10, 2023.

By
Volcano Hazards Program, Hawaiian Volcano Observatory, Kīlauea

Mapping karst groundwater flow paths and delineating recharge areas for Fern Cave, Alabama, through the use of dye tracing

Fern Cave in Jackson County, Alabama, is a 15.6-mile-long (25.1-kilometer) cave system, managed by the U.S. Fish and Wildlife Service and Southeastern Cave Conservancy, that has the second highest biodiversity of any cave in the southeastern United States. Groundwater in karst ecosystems is known to be susceptible to impacts from human-induced land-use activities in watersheds that contribute rech
By
Lower Mississippi-Gulf Water Science Center

Aeromagnetic map of northeastern California

Aeromagnetic surveys were conducted to improve understanding of the geology and structure in northeastern California, a region predominantly covered by Quaternary and Tertiary, mainly Neogene, volcanic rocks including Medicine Lake volcano. New aeromagnetic data are a substantial improvement over existing data and reveal structural details not resolved by older surveys. Here we show how these data
By
Geosciences and Environmental Change Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Estimating streambed hydraulic conductivity for selected streams in the Mississippi Alluvial Plain using continuous resistivity profiling methods—Delta region

Introduction The Mississippi Alluvial Plain is one of the most important agricultural regions in the United States, and crop productivity relies on groundwater irrigation from an aquifer system whose full capacity is unknown. Groundwater withdrawals from the Mississippi River Valley alluvial aquifer have resulted in substantial groundwater-level declines and reductions in base flow in streams with
By
Lower Mississippi-Gulf Water Science Center

Geologic and geophysical maps of the Stockton 30’ × 60’ quadrangle, California

This pamphlet and accompanying geologic and geophysical maps are the products of cooperative efforts by the California Geological Survey (CGS) and United States Geological Survey (USGS) to compile a comprehensive, digital representation of the bedrock geology, Quaternary surficial deposits, and potential-field anomalies within the boundaries of the Stockton 30’ × 60’ quadrangle. The Stockton 30’ ×
By
Geology, Minerals, Energy, and Geophysics Science Center
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