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plasmas

NASA’s Mars Atmosphere and Volatile Evolution spacecraft orbits Mars and samples electrons behind the Martian bow shock in this artist’s rendition.
Posted inResearch Spotlights

Explaining the Missing Energy in Mars’s Electrons

by Mark Zastrow 11 November 201910 March 2022

Electrons energized and trapped at Mars were thought to lose energy inside the planet’s magnetosheath, but new research suggests a different explanation of spacecraft data.

Plots of average wave electric field power spectral densities on the nightside
Posted inEditors' Highlights

Human-made Emissions Modify Electron Space Environment

by Viviane Pierrard 2 August 20198 August 2022

Very Low Frequency transmitters used for communications with submarines modify the dynamics of energetic electrons in the inner radiation belt and the slot region.

Measurements of electron density from the COSMIC satellite
Posted inEditors' Highlights

Holistic Views of the Nighttime Ionosphere

by M. Liemohn 22 July 201922 March 2023

The nightside ionosphere, at latitudes away from the auroral zone, should have very little charged particle density, but it doesn’t. A new comprehensive study of satellite data explains why.

Posted inEditors' Highlights

Red and Green Aurora Stop and Go for Different Reasons

by Viviane Pierrard 5 July 201911 August 2022

Green-line arc is found to be embedded within large-scale upward field aligned currents while red-line-only arc is found to be associated with low-energy precipitation bursts.

Posted inEditors' Highlights

Plasma Density Distribution in Mercury’s Magnetosphere

by Y. Wang 27 February 20197 March 2022

A new measurement of plasma density distribution in Mercury’s magnetosphere obtained from observations of field line resonance events provides necessary constraint for many planetary science issues.

An artist’s rendition of the NASA satellites that observe Earth’s magnetosphere
Posted inResearch Spotlights

New Plasma Wave Observations from Earth’s Magnetosphere

by Terri Cook 28 January 201913 October 2022

The first simultaneous observations of multiple electromagnetic wave types in Earth’s magnetosphere may inaugurate a new field of inquiry into cross-frequency wave interactions.

Posted inEditors' Highlights

Jupiter’s Stressed Out Magnetosphere Causes Aurora and Heating

by M. Liemohn 2 January 201918 January 2023

Force imbalance between Jupiter’s ionosphere and magnetosphere leads to wave generation to release this stress, but the waves also accelerate particles, causing aurora and heating.

A coronal loop of plasma travels along the Sun’s magnetic field lines
Posted inResearch Spotlights

Plasma Activity Around Sunspots May Foreshadow Solar Storms

Aaron Sidder, freelance science writer by Aaron Sidder 5 December 201831 January 2023

A new study identifies possible precursors to space weather in the regions encircling sunspots.

Posted inEditors' Highlights

A New Angle on the Earth’s Radiation Belts

by M. Liemohn 21 May 201813 April 2022

A new empirical model of energetic electrons from Van Allen Probes data includes pitch angle analysis, revealing insights about radiation belt energization and loss processes.

Researchers examine a large plasma hole generated by a satellite launch to understand the impacts of anthropogenic space weather.
Posted inResearch Spotlights

Understanding the Effects of Anthropogenic Space Weather

by Terri Cook 1 May 201824 October 2022

A large plasma hole generated by the vertical launch of the Formosat-5 satellite created temporary navigating and positioning errors of up to 1 meter, according to a new study.

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EDITORS' VOX
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“What We Know and Don’t Know About Climate Tipping Elements”
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