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hydrothermal systems

Underwater photo of smoke erupting from the sea floor.
Posted inEditors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

by Laurence A. Coogan, Alexandra V. Turchyn, Ann G. Dunlea and Wolfgang Bach 3 December 20253 December 2025

From a gathering of scientists at a uniquely well-preserved section of ancient oceanic crust came a monograph investigating the latest in hydrothermal fluxes and seawater chemistry.

Enceladus’s horizon backlit by the Sun, highlighting several plumes of material coming from the surface.
Posted inNews

Speedy Flyby Adds New Organics to Enceladus’s “Primordial Soup”

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 12 November 202512 November 2025

A new analysis of old Cassini data has also verified past detections of complex organics in Saturn’s E ring, strengthening the chemical ties between the ring and its progenitor.

Pieces of gray rock are embedded in a small plastic disk and held by a hand wearing a blue glove.
Posted inNews

A Flash, a Boom, a New Microbe Habitat

Katherine Kornei, Science Writer by Katherine Kornei 17 October 202517 October 2025

After an asteroid struck Finland long ago, microscopic life colonized the impact site within a few million years, new research reveals.

A heavily damaged section of boardwalk covered in rocks winds over muddy, debris-covered ground with steam rising from the ground in the background
Posted inFeatures

Hydrothermal Hazards on Display in Yellowstone National Park

by Lauren Harrison, Michael Poland, Mara Reed, Ken Sims and Jefferson D. G. Hungerford 27 June 20253 July 2025

Tourists and officials were startled by a hydrothermal explosion at Black Diamond Pool in July 2024. Geoscientists are working out how and why it occurred to better understand these hazardous events.

Photo of a Martian crater.
Posted inEditors' Highlights

Geophysics Sheds Light on Early Martian Water and Habitability

by Michael M. Sori 15 April 202511 April 2025

A new study uses inversions of orbital gravity and magnetic field data to argue for the presence of ancient, long-lasting hydrothermal systems on Mars.

The Alvin submersible hovers over and illuminates the seafloor near the rocky towers of a hydrothermal vent site.
Posted inScience Updates

An Upgraded Alvin Puts New Ocean Depths Within Reach

by Kenna Harmony Rubin, Anna P. M. Michel and S. Adam Soule 31 January 202513 March 2025

The newly retooled submersible, which has already returned fascinating new findings from Earth’s watery depths, is opening more of the deep ocean to direct human exploration.

Image of an underwater volcano.
Posted inEditors' Highlights

Imaging Magma from Afar

by Peter Zeitler 20 December 202419 December 2024

Reservoirs of magma and fluids in the crust create gravity anomalies detectable by altimetry, which can help find submarine volcanoes and provide key insights into their depth, shape and volume.

A black smoker, shaped like a stone cylinder on the ocean floor, spews black smoke into the water.
Posted inNews

Arctic Hydrothermal Vents May Resemble Those on Enceladus

by Anna FitzGerald Guth 17 December 202417 December 2024

By studying hydrogen-rich vent sites on Earth, scientists could learn more about the hidden ocean of Saturn’s icy moon—one of our solar system’s likeliest candidates for harboring life beyond Earth.

Earth’s mid-ocean ridge system, shown in mostly blue and green.
Posted inNews

Mid-Ocean Ridges Could Be Dispersing Thermophilic Bacteria

by Miriam Bahagijo 12 December 202412 December 2024

Scientists suggest that two strains of endospores located more than 4,000 kilometers away from one another originated in the same place: along the Mid-Atlantic Ridge.

A spherical reddish planet with white ice at its base appears against a black background.
Posted inNews

Martian Meteorite Points to Ancient Hydrothermal Activity

Katherine Kornei, Science Writer by Katherine Kornei 22 November 202424 November 2024

The Red Planet had water—in the form of a hydrothermal system—4.45 billion years ago, new analyses of a Martian meteorite suggest.

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A view of a bridge, with the New Orleans skyline visible in the distance between the bridge and the water. A purple tint, a teal curved line representing a river, and the text “#AGU25 coverage from Eos” overlie the photo.

Features from AGU Publications

Research Spotlights

New River Chemistry Insights May Boost Coastal Ocean Modeling

9 January 20269 January 2026
Editors' Highlights

Central China Water Towers Provide Stable Water Resources Under Change

9 January 20269 January 2026
Editors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

3 December 20253 December 2025
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