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Bedrock geologic map of the Bellows Falls 7.5- x 15-minute quadrangle, Windham and Windsor Counties, Vermont, and Sullivan and Cheshire Counties, New Hampshire
Introduction The bedrock geology of the Bellows Falls 7.5- x 15-minute quadrangle, Vermont and New Hampshire, consists of polydeformed Ordovician to Devonian metasedimentary, metavolcanic, and metaplutonic rocks of the Connecticut Valley trough, Bronson Hill anticlinorium (or Bronson Hill terrane), and the Central Maine terrane. Previous work in this area includes a 1:62,500-scale...
May 21, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on May 21, the eruption continues episodically.
April 30, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on April 30, 2025, the eruption has had eighteen episodes, with the most recent occurring on April 22.
April 17, 2025—InSAR image of Kīlauea deformation associated with ongoing eruption
This map shows deformation at Kīlauea volcano associated with the ongoing summit eruption that started on December 23, 2024.
Altitude of the potentiometric surface and depth to water in the Mississippi River Valley alluvial aquifer, spring 2022
Potentiometric-surface and depth-to-water maps for spring 2022 were created for the Mississippi River Valley alluvial aquifer (MRVA) using groundwater-altitude data from 1,136 wells completed in the MRVA and from the altitude of the top of the water surface in area rivers from 160 streamgages. The potentiometric-surface and depth-to-water maps for 2022 were created to support...
April 9, 2025 — Thermal map of episode 17 lava flow at Kīlauea summit
This thermal map was taken on the 7 a.m. overflight of Kīlauea summit on April 9, 2025, and shows the expansive lava flow covering the floor of Halema‘uma‘u, supplied by lava fountains at the vent.
April 9, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024.
April 1 and 2, 2025 — Thermal maps of episode 16 summit activity at Kīlauea
This set of thermal maps shows activity near the beginning and just after the end of episode 16 lava fountaining at the summit of Kīlauea.
April 2, 2025 — Annotated thermal map of Kīlauea summit
This close-up thermal map shows the crater floor at the summit of Kīlauea just an hour after the end of episode 16 lava fountaining on April 2.
March 27, 2025 — Thermal maps of activity at Kīlauea summit
This compilation shows thermal maps made shortly after three different lava fountaining episodes at the summit of Kīlauea.
March 18, 2025—Kīlauea summit eruption reference map
This reference map depicts the ongoing Kīlauea summit eruption within Halema‘uma‘u crater as of March 18, 2025.
March 10, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024.