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magnetic fields & magnetism

The upper left image shows a clay pot. The lower part of the image is a chart showing age on the x axis and field intensity on the y axis. From about 1050 BCE until 700 BCE, the field intensity is high and has four spikes. After that, it falls until it reaches a low at about 200 CE before rising slightly and falling again at about 1800 CE. The spiky high is circled and labeled “Levantine Iron Age Anomaly” in red. The low from about 1800 to 2000 CE is circled in blue and labeled “Modern field.” A green line of the field intensity of the pot intersects the modern field. In the upper right corner is a large “FAKE” stamp.
Posted inNews

Credible or Counterfeit: How Paleomagnetism Can Help Archaeologists Find Frauds

by Alka Tripathy-Lang 16 December 202516 December 2025

Duplicating artifacts that preserve records from biblical times is a lucrative business. A method used for both dating artifacts and reconstructing Earth’s history could identify phony pieces.

A pale gray rock shows an impression of multiple curved lines.
Posted inNews

The Long and the Weak of It—The Ediacaran Magnetic Field

Katherine Kornei, Science Writer by Katherine Kornei 9 December 20259 December 2025

A roughly 70-million-year interval of anomalously weak magnetic field during the Ediacaran period could have triggered atmospheric changes that supported the rise of macroscopic life.

A series of structures that look like electrical poles extend into the distance on an icy surface. The sky above is full of stars and streaked with green aurorae.
Posted inNews

A Weak Spot in Earth’s Magnetic Field Is Going from Bad to Worse

by Tom Metcalfe 10 November 202510 November 2025

This could be bad news for satellites and spacefarers.

Two images of Earth from afar with lines indicating satellite orbit paths.
Posted inEditors' Highlights

Space Weather Monitoring from Commercial Satellite Mega-Constellations

by Steven K. Morley 4 November 20253 November 2025

Enabling unprecedented monitoring of key electric current systems in low-Earth orbit using commercial satellite mega-constellations advances space weather monitoring.

A lake, surrounded by low hills and trees, is overlooked from a nearby hill. In the mid-ground, a white truck drives across the frame.
Posted inResearch Spotlights

New 3D Model Reveals Geophysical Structures Beneath Britain

by Nathaniel Scharping 10 October 202510 October 2025

Using magnetotelluric data to identify subsurface electrically conductive and resistive areas, scientists can identify underground features and predict how space weather may affect infrastructure.

An artist’s depiction of four purple octagonal spacecraft flying in space. The light behind them is orange from the Sun, and in the background at right is Earth, surrounded by an overlapping series of magnetic field lines.
Posted inResearch Spotlights

Magnetic “Switchback” Detected near Earth for First Time

Sarah Stanley, Science Writer by Sarah Stanley 8 October 20258 October 2025

Until recently, this type of zigzag shape—formed by energetic rearrangement of magnetic field lines—had been seen only near the Sun.

Cutaway diagram of seismographic waves passing through the interior of Mars, with a metal core at center
Posted inNews

Scientists May Have Finally Detected a Solid Inner Core on Mars

Javier Barbuzano, Science Writer by Javier Barbuzano 1 October 20251 October 2025

Seismic clues from NASA’s InSight mission suggest that Mars hides a solid inner core, and raise new questions about why the planet’s magnetic field disappeared.

A rocket launches in front of a clear sky
Posted inResearch & Developments

Trio of Space Weather Satellites Take Flight

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 24 September 202524 September 2025

These three satellites will that study the solar wind and its impacts.

An illustration of an orange-yellow star releasing a massive flare and stellar material along a magnetic loop that connects with a nearby red planet that is outgassing its atmosphere.
Posted inNews

Exoplanet Triggers Stellar Flares and Hastens Its Demise

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 5 August 20255 August 2025

HIP 67522 b can’t stop blasting itself in the face with stellar flares, a type of magnetic interaction that scientists have spent decades looking for.

An artist’s depiction of Jupiter and its magnetosphere, which appears to stretch out to the left and right of the planet like two purple butterfly wings
Posted inResearch Spotlights

A Solar Wind Squeeze May Have Strengthened Jovian Aurorae

Sarah Stanley, Science Writer by Sarah Stanley 1 August 20251 August 2025

Juno spacecraft data suggest an extreme compression of the planet’s magnetosphere in December 2022, caused by the solar wind, briefly brightened the ultraviolet light displays.

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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

An Ecosystem Never Forgets

19 December 202519 December 2025
Editors' Highlights

Frictional Properties of the Nankai Accretionary Prism

11 December 20259 December 2025
Editors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

3 December 20253 December 2025
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