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Journal of Geophysical Research: Space Physics

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Ions moving in the Earth’s dipole magnetic field are represented by colored dots in equatorial phase coordinates.
Posted inEditors' Highlights

Modification of Energetic Particles Loss Cone During Storms

by Viviane Pierrard 17 August 202214 October 2022

The loss cone of energetic particles in the Earth’s inner magnetosphere is substantially modified during disturbed times, with important implications for the radiation-belt and ring current modeling.

Figures showing global distributions of calculated height-integrated Pedersen conductance and Hall conductance.
Posted inEditors' Highlights

Meteoric Ions Influence Conductance in the Jovian Ionosphere

by Viviane Pierrard 29 April 20227 September 2022

Meteoric ions dominate the Jovian lower ionosphere due to their long lifetimes. Due to the large densities of the meteoric ions, conductance is enhanced independently of local time.

Plot showing the latitudinal profile of F-region meridional wind as a function of local time for the day of 4 January 2019.
Posted inEditors' Highlights

Thermospheric Cross-Polar Winds Observed to Unexpectedly Stall

by Michael P. Hickey 7 October 202113 October 2021

Observations of cross-polar cap neutral winds near 240 km altitude stalling over short distances in the midnight sector near Poker Flat, Alaska, challenge the standard view of high-latitude dynamics.

The location of Jupiter’s northern aurorae, as seen by the Hubble Space Telescope
Posted inResearch Spotlights

Could Low-Altitude Reconnection Power Jupiter’s Polar Aurorae?

by Morgan Rehnberg 21 September 202118 July 2023

Magnetic reconnection events less than 2 Jovian radii above the planet’s cloud tops could explain why Juno has yet to observe a source for Jupiter’s polar aurore.

Researchers present a new technique for estimating magnetosphere-ionosphere interactions at Earth’s poles.
Posted inResearch Spotlights

Filling the Gaps in the SuperDARN Archive

Kate Wheeling, freelance science writer by Kate Wheeling 13 September 202121 October 2021

Researchers present a new pattern-finding technique to better estimate missing data on ionospheric plasma velocities.

An artist’s conception of the Cluster satellites in orbit around Earth
Posted inResearch Spotlights

Understanding Aurora Formation with ESA’s Cluster Mission

by Morgan Rehnberg 7 September 202129 September 2021

Over 2 decades, Cluster has shed light on the auroral acceleration region, where parallel electric fields send charged particles on a collision course with the atmosphere.

The heat surface of El Niño in 2015 looks like El Niño in 1997.
Posted inResearch Spotlights

Explaining Thermal Tides in the Upper Atmosphere During the 2015 El Niño

by David Shultz 26 August 202116 March 2023

Increased tropospheric heating and reduced dissipation combine to explain an anomalously large thermal tide.

Two plots showing the Cumulative probability of scintillation exceeding a certain value versus geomagnetic activity in July-December 2017.
Posted inEditors' Highlights

The Auroral E-region is a Source for Ionospheric Scintillation

by Michael P. Hickey 9 August 202111 August 2022

Observations reveal a connection between auroral particle precipitation and scintillation, indicating that the ionospheric E-region is a key source region for phase scintillation at auroral latitudes.

Plot showing K-H waves-related magnetic field variations correlated with the local geomagnetic B variations at Neumayer Station III.
Posted inEditors' Highlights

Satellite Data Reveal Magnetospause K-H Waves Impact Auroras

by Michael P. Hickey 5 August 202128 September 2021

Analysis of multiple satellite data has revealed a striking connection between K-H waves on the magnetopause, surface waves in the hot zone near the plasmapause, and auroral undulations.

Artist’s conception of the motion of charged particles in Earth’s magnetosphere
Posted inResearch Spotlights

A New Approach to Characterizing Space Plasmas

by Morgan Rehnberg 16 December 202013 October 2022

When plasma particle velocity distributions have multiple, distinct parts, treating each as a separate beam may yield more intuitive results.

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