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magnetic fields & magnetism

Drill rig in water
Posted inNews

Chicxulub Impact Crater Hosted a Long-Lived Hydrothermal System

Katherine Kornei, Science Writer by Katherine Kornei 30 June 20207 March 2022

Chemical and mineralogical evidence of fluid flow—potentially conducive to microscopic life—was revealed in rock cores extracted from the crater’s “peak ring.”

Two charts showing simulated geoelectric fields along a profile running south-east to north-west through New York City
Posted inEditors' Highlights

Is Space Weather Worse by the Sea?

by Michael A. Hapgood 29 June 202028 March 2023

A new simulation of space-weather driven geoelectric fields at the land/sea conductivity boundary shows how these fields are magnified by both coastal effects and inhomogeneous land conductivity.

Plumes of ice particles erupt from the surface of Enceladus in an image from the Cassini spacecraft
Posted inResearch Spotlights

Electron Density near Enceladus Shows Orbital Variation

by Morgan Rehnberg 24 June 202010 February 2023

The electron density peaks well after the activity of the moon’s distinctive south polar ice plume reaches its maximum, but the cause of the lag remains puzzling.

Graphic showing what the JEDI instrument can see of Io and Europa from its trajectory
Posted inEditors' Highlights

New Energetic Neutral Atom Emissions from Jupiter, Io, and Europa

by Viviane Pierrard 15 June 202011 April 2023

The first Jovian off-equator Energetic Neutral Atom viewings reveal distinct emissions from Jupiter and the orbits of Io and Europa: Energetic particle injections surprisingly occur inside Io’s orbit.

Metal and concrete salmon pools at Oregon’s McKenzie River Hatchery
Posted inNews

Internal Compass Guides Salmon’s Incredible Journey

Mary Caperton Morton, Science Writer by Mary Caperton Morton 9 June 202019 July 2022

New study finds evidence that magnetite particles play a role in fish navigation.

World map showing location of permanent geomagnetic observatories and their data availability for electromagnetic source characterization.
Posted inEditors' Highlights

Globally Variable Water Content in the Mantle Transition Zone

by S. D. Jacobsen 9 June 20204 August 2023

Using electromagnetic waves originating in the ionosphere and magnetosphere, conductivity profiles reaching the deep upper mantle show surprising variability in water content.

Artificial neuron with binary code radiating outward from the cell body
Posted inNews

The Future of Big Data May Lie in Tiny Magnets

Richard Sima, freelance science writer by Richard J. Sima 2 June 202025 March 2022

New research in the field of neuromorphic computing uses tiny magnets and their magnetic fields to optimize computing algorithms.

Artist’s depiction of the MAVEN spacecraft orbiting Mars
Posted inNews

A Longer-Lived Magnetic Field for Mars

Javier Barbuzano, Science Writer by Javier Barbuzano 1 June 202013 March 2023

New research indicates Mars’s dynamo may have been active for millions of years longer than previously thought.

Illustration of Jupiter’s magnetosphere and innermost planets
Posted inResearch Spotlights

Two Moons and a Magnetosphere

Sarah Stanley, Science Writer by Sarah Stanley 21 April 202018 October 2022

Decades of research have illuminated how Io and Europa shape—and are shaped by—Jupiter’s giant magnetosphere.

Elevated photo of a busy Hong Kong street during a light rain
Posted inResearch Spotlights

Chinese Swamp Core Reveals 47,000 Years of Monsoon History

Sarah Stanley, Science Writer by Sarah Stanley 2 April 202027 January 2023

Magnetic analysis of mineral composition supports the importance of tropical climate processes in shaping long-term monsoon patterns.

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