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Geochemistry, Geophysics, Geosystems

Visit the journal.

View overlooking part of Acapulco, Mexico, in the foreground with Acapulco Bay beyond
Posted inResearch Spotlights

Talc May Make Mexico’s Subduction Zone More Slippery

Aaron Sidder, freelance science writer by Aaron Sidder 23 August 202323 August 2023

Production of the weak, water-bearing mineral at the interface between the Cocos and North American Plates could contribute to the occurrence of poorly understood episodic tremor and slow slip.

Photo showing technologies for monitoring volcanic gas emissions.
Posted inEditors' Highlights

Send in the Drones: Safely Monitoring Volcanic Gas Emissions

by Paul Asimow 8 June 20238 June 2023

New drone technology was combined with satellite and ground-based data to improve volcanic gas flux monitoring at the remote Bagana Volcano in Papua New Guinea.

Field photograph of the base of the Sevier gravity slide at the North Sanford Valley site.
Posted inEditors' Highlights

A Giant Rockslide on a Bed of Steam

by Peter van der Beek 25 May 202324 May 2023

Detailed observations of the giant Sevier gravity slide in Utah show that the exceedingly low basal friction required for its rapid emplacement was developed by trapped thermally pressurized fluids.

Maps of study region and graphs from the paper.
Posted inEditors' Highlights

Under Pressure: Recording Earthquakes at and Below the Seafloor

by Sergei Lebedev 27 October 202230 November 2022

Cabled ocean-floor observatories record ground shaking and pressure variations, which contribute to early warning systems and give us a unique view of the ocean–crust coupling.

World map
Posted inEditors' Highlights

Machine Learning Looks Anew at Isotope Ratios in Oceanic Basalts

by Paul Asimow 25 October 202224 October 2022

While past attempts to define isotopic endmembers and assign them a geodynamic significance ended in controversy, a machine-learning clustering algorithm offers a solution to this classical problem.

Three images showing the study area from different perspectives.
Posted inEditors' Highlights

Probing the Sedimentology of a Continental Megathrust

by Peter van der Beek 6 September 202222 December 2022

Detailed analysis of sediments covering the Main Frontal Thrust in Nepal show how climate-driven baselevel changes affect sedimentation and should be considered when inferring thrust activity.

Three field photos of the study area.
Posted inEditors' Highlights

Searching for Earth’s Oldest Rocks in its Youngest Deposits

by Peter van der Beek 18 August 202225 August 2022

By sampling and analyzing zircons from glacial eskers dating from about 20,000 years ago, the extent of the oldest known rocks on Earth can be better mapped and constrained.

A diagram and a graph showing how ocean island eruptions are much more likely to exhibit SO2 degassing and deformation.
Posted inEditors' Highlights

Why Do Arc Volcanoes Deform Less Than Ocean Island Volcanoes?

by Paul Asimow 15 August 202215 November 2022

Volcanic ground deformation is not simply correlated with erupted volume. Researchers propose that high concentrations of magmatic volatiles make systems more compressible and suppress deformation.

Two phase diagrams calculated by (a) Perple_X and (b) the new MAGEMin software.
Posted inEditors' Highlights

A New, Fast Computational Tool for Magmatic Phase Equilibria

by Paul Asimow 11 August 202222 December 2022

Thermodynamic calculations in multiphase, multicomponent magmatic systems can be slow and buggy. A new parallel architecture solves the free energy minimization problem much faster than alternatives.

A representation of the “plumbing system” underneath a volcano, with multiple reservoirs at different depths in the crust where magma may be stored.
Posted inEditors' Highlights

Machine Learning Helps See into a Volcano’s Depths

by Paul Asimow 27 April 202215 November 2022

How big might future volcanic eruptions be? Crystals carry information to answer this and machine learning methods can visualize and interpret this multidimensional data.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
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“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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