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magnetic fields & magnetism

A Candidatus Magnetobacterium casensis cell containing magnetite crystals
Posted inResearch Spotlights

Chemical-Shuttling Bacteria Follow Earth’s Magnetic Field

Elizabeth Thompson by Elizabeth Thompson 4 December 202022 December 2021

Magnetotactic bacteria shunt sulfur, nitrogen, and other important elements between oxygen-poor and oxygen-rich waters.

A colorful depiction of the four Magnetospheric Multiscale mission satellites traversing Earth’s magnetic field
Posted inNews

Bringing Clarity to Magnetic Reconnection

Damond Benningfield, Science Writer by Damond Benningfield 24 November 202018 July 2023

A particle-level process appears to play a key role in planet-sized events throughout the universe.

Photograph of pseudotachylytes, also known as “earthquake fossils”, from Santa Rosa, California
Posted inEditors' Vox

New Insights from the Magnetic Properties of Fault Rocks

by Mark J. Dekkers, E. C. Ferré, Y.-M. Chou, T. Yang, J. Chen, E.-C. Yeh and W. Tanikawa 13 November 20206 October 2021

Magnetic studies offer a new strand for the analysis of faulting processes and could help with better understanding of fault rupture and earthquakes.

Jupiter as seen by the Juno spacecraft on 17 February 2020
Posted inResearch Spotlights

A Juno Era Model of the Jovian Magnetosphere

by Morgan Rehnberg 9 November 202020 July 2022

Updating a model developed during the Voyager flybys will enable better mission planning and a deeper understanding of Juno data.

Researchers conduct magnetic measurements of a meteorite at the Smithsonian Museum Support Center.
Posted inNews

Measuring Massive Magnetic Meteorites

by Andrew J. Wight 4 November 202015 November 2022

A new tool to measure the magnetic signatures of big meteorites could not only aid NASA’s mission to Psyche; it could also help solve mysteries about how magnetic fields formed in our early solar system.

Illustration showing the dayside magnetosphere and its surroundings
Posted inEditors' Vox

New Results Concerning Solar Wind Entry into the Magnetosphere

by D. G. Sibeck, Q. Zong, P. Escoubet, G. Le and H. Zhang 28 October 202018 July 2023

A new book describes recent results defining the many pathways and foreshock, bow shock, magnetosheath, and magnetopause phenomena connecting the solar wind to the dayside magnetosphere.

Three dolphins lie in mud and shallow water along a shoreline
Posted inResearch Spotlights

Geomagnetic Storms Probably Don’t Cause Mass Cetacean Strandings

by Morgan Rehnberg 28 October 20207 March 2023

Solar-induced geomagnetic activity and mass strandings of whales and dolphins on shorelines both show seasonal patterns, but the beachings likely result from multiple environmental factors.

Example of the convolutional neural network (CNN) approach from an area in the Black Hill norite
Posted inEditors' Highlights

Machine Learning for Magnetics

by Mark J. Dekkers 21 October 202020 December 2021

Classic interpretation of aeromagnetic anomaly maps involves several steps with limiting boundary conditions; a recent study develops convolutional networks largely bypassing these issues.

Plot showing two known endmembers fitted with several magnetic components
Posted inEditors' Highlights

Unmixing Magnetic Components – An Experimental Twist

by Mark J. Dekkers 19 October 202021 October 2021

Various unmixing approaches are used in environmental magnetism, each starting from a different premise; now they are put to the test by scrutinizing experimental mixtures of known endmembers.

Radio towers at the VLF Transmitter Cutler in Maine
Posted inResearch Spotlights

Terrestrial Radio Signals May Suppress High-Energy Electrons

by Morgan Rehnberg 12 October 202018 January 2023

Naval radio signals may cause the formation of a barrier observed during geomagnetic storms that is seemingly impenetrable by relativistic electrons.

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