GIS Data

The U.S. Geological Survey, in cooperation with the National Marine Sanctuary Program of the National Oceanic and Atmospheric Administration, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993. The area being mapped using geophysical and geological data includes the SBNMS and the surrounding region, which totals

Introduction The Emmons Lake volcanic center is a spatially clustered group of stratovolcanoes and calderas in the southwestern part of the Alaska Peninsula, Alaska. The volcanic center is characterized by several ice- and snow-clad stratovolcanoes located within and along the margins of a nested-caldera complex that includes Emmons Lake. A shieldlike ancestral edifice (ancestral Mount...

This map shows the tephra fall associated with episode 43 of Kīlauea's episodic summit eruption, on March 10, 2026. Tephra is a generic word for any material erupted by a volcano that travels through the air before landing on the ground.

Starting in the early 2000s, increasing oil and gas development in western North Dakota created a need for additional water resources from surface-water and groundwater sources near the North Unit of Theodore Roosevelt National Park. To summarize the use of water in that area, the U.S. Geological Survey, in cooperation with the National Park Service, developed a map of surface-water and

This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on March 2, 2026, the eruption has had forty-two episodes, with the most recent occurring on February 15.

These thermal maps at the summit of Kīlauea show the crater floor after episodes 41 and 42. Episode 41 produced a lava flow that covered much of the eastern crater floor, while episode 42 produced flows that stopped short of reaching the eastern edge of the crater floor.

This map shows lava flow and tephra accumulation at the summit of Kīlauea volcano associated with episode 42 of the ongoing eruption in Halemaʻumaʻu that started on December 23, 2024, using data recorded by the Italian Space Agency's (ASI) COSMO-SkyMed Second Generation satellite constellation.

This map shows recent deformation at Kīlauea, over the timeframe of February 10–16, 2026. Data were acquired by the European Space Agency's Sentinel-1A/C satellites. Each color cycle represents 2.8 cm (1.1 in) of ground movement in the direction between the satellite and the ground (range change).

This map shows the tephra fall associated with episode 41 of Kīlauea's episodic summit eruption, on January 24, 2026. Tephra is a generic word for any material erupted by a volcano that travels through the air before landing on the ground.

This map depicts the locations of approximately 300 earthquakes that have occurred between January 12 and 22, 2026, in the summit region of Kīlauea volcano. Most earthquakes have been smaller than magnitude-2, with locations broadly distributed beneath Halemaʻumaʻu and the south caldera region of Kīlauea summit.

The bedrock geology of the 7.5-minute Eagle Lake quadrangle, Essex County, New York, consists of deformed and metamorphosed Mesoproterozoic gneisses of the Adirondack Highlands unconformably overlain by weakly deformed lower Paleozoic sedimentary rocks of the Champlain Valley. The Mesoproterozoic rocks occur on the eastern edge of the Adirondack Highlands and represent an extension of...

This thermal map of the summit of Kīlauea was made from images collected during a January 16 overflight, just four days after the episode 40 lava fountaining on January 12.