GIS Data
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April 15, 2026—Summary map of tephra fall after episode 44 lava fountaining at the summit of Kīlauea April 15, 2026—Summary map of tephra fall after episode 44 lava fountaining at the summit of Kīlauea
This map shows the tephra fall associated with episode 44 of Kīlauea's episodic summit eruption, on April 9, 2026. Tephra is a generic word for any material erupted by a volcano that travels through the air before landing on the ground.
April 15, 2026—InSAR image of Kīlauea deformation associated with episode 44 of ongoing summit eruption April 15, 2026—InSAR image of Kīlauea deformation associated with episode 44 of ongoing summit eruption
COSMO-SkyMed Second Generation (CSG) interferogram for the period from April 1 to April 9, 2026, covering Kīlauea volcano’s summit region. Each color fringe represents 1.55 centimeters (0.61 inches) of ground movement in the direction between the satellite and the ground (range change).
April 13, 2026—Kīlauea summit eruption reference map April 13, 2026—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024.
Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 3 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts
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
Geologic map of the Emmons Lake volcanic center, Alaska Geologic map of the Emmons Lake volcanic center, Alaska
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...
March 12, 2026—Summary map of tephra fall after episode 43 lava fountaining at the summit of Kīlauea March 12, 2026—Summary map of tephra fall after episode 43 lava fountaining at the summit of Kīlauea
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.