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magnetic fields & magnetism

Photo looking down on Earth from a satellite, showing red and green streaks flickering in the atmosphere
Posted inNews

Eavesdropping on the Vibrations of Earth’s Magnetic Bubble

by Erin Martin-Jones 9 May 202316 May 2023

A NASA-funded crowdsourced science project has converted the unheard sounds resonating inside Earth’s magnetic shield into audible tracks, revealing an orchestra of whistles, wooshes, and chirps.

Photos from the study
Posted inEditors' Highlights

Collaboration Helps Overcome Challenges in Air Quality Monitoring

by Muki Haklay 19 April 20237 June 2023

Everything looks ideal for collaboration: interest from community members, a new method for monitoring air quality by scientists, and interest from policymakers. What happens next?

Figures from the paper.
Posted inEditors' Highlights

Meshless Methods Tell Us What Lurks Beneath the Surface

by Mohammad M. Al-Khaldi 10 April 20234 April 2023

Limitations with resolving complex underground targets with sufficiently fine resolution may be alleviated through the adoption of meshless electromagnetic methods.

An orange “doughnut,” the plasmasphere, encircles Earth, with curved lines representing Earth’s magnetic field arcing through it and the Moon in the background.
Posted inNews

Tides Ripple Across Earth’s Plasma “Donut”

Damond Benningfield, Science Writer by Damond Benningfield 4 April 20234 April 2023

Interactions between lunar gravity and the terrestrial magnetic field may cause a 90° offset from the Moon’s position in its orbit.

A blue and yellow electrical passenger train travels past green trees toward the viewer along one of two sets of parallel tracks.
Posted inResearch Spotlights

How Space Storms Miscue Train Signals

Sarah Stanley, Science Writer by Sarah Stanley 30 March 2023

Geomagnetic storms could significantly disrupt electrified train operations in the United Kingdom once every few decades, according to a new study.

Map of study area and graphs showing magnetic signal evolution.
Posted inEditors' Highlights

Rapid Evolution of Volcanic Systems Reflected in Magnetics

by Agnes Kontny 28 February 202324 February 2023

Spatiotemporal magnetic monitoring along with InSAR models is a powerful tool to image magmatic, hydrothermal, and mechanical changes within the volcanic edifice of the Piton de la Fournaise.

A red plane flies against clear blue skies over white ice. Mountains can be seen in the background.
Posted inResearch Spotlights

How Thick Is Antarctic Ice, and What Is Underneath?

by Saima May Sidik 22 February 202322 February 2023

Scientists used electromagnetic fields to determine the thickness of fast ice.

Graphs showing the interior evolution of Miranda diverging from that of Ariel.
Posted inEditors' Highlights

What Surprises do the Icy Uranian Moons Hold?

by Kelsi Singer 22 February 202317 February 2023

With efforts ramping up to send a spacecraft back to the Uranian system, anticipation is increasing as to what geological surprises are hiding inside and on the surfaces of the icy Uranian moons.

Aerial photo of study site and two graphs.
Posted inEditors' Highlights

Large Geomagnetic Field Changes Recorded by Archeomagnetism

by Agnes Kontny 14 February 202314 March 2023

A rare case of absolute paleointensity data in sub-centennial resolution from an archeological site provide much higher values than predicted by existing magnetic field models.

View of steep hills with exposures of dark rock as well as patches of green vegetation
Posted inFeatures

Baked Contacts Focus a Lens on Ancient Lava Flows

by Anthony Pivarunas, Margaret Avery, Joseph Biasi and Leif Karlstrom 1 February 202325 May 2023

Two studies, conducted 40 years apart, show how combining field observations and thermal modeling can reconstruct the history of massive lava flows and how they altered the surrounding landscape.

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18 September 202516 September 2025
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In Appreciation of AGU’s Outstanding Reviewers of 2024

18 September 202518 September 2025
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