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ionospheres

Right: Image of a solar flare observed on 19 October 2014. Left: Diagram showing configuration of the planets at the time of the flare
Posted inEditors' Highlights

The Importance of Solar Lyman-alpha Emissions for Space Weather

by Michael A. Hapgood 29 September 202013 October 2022

Lyman-alpha emissions convey a major part of the solar-flare photon energy reaching Earth and play a significant role in flare-driven enhancements of ionospheric conductivity.

Plots recording observations of electromagnetic ion cyclotron waves at four different locations
Posted inEditors' Highlights

All Hands on Deck to Catch Ion Cyclotron Waves

by A. Yau 7 August 202011 August 2022

An international armada of orbiting satellites and ground VLF network join forces to form a “magnetosphere-ionosphere observatory” to size up electromagnetic ion cyclotron waves in the magnetosphere.

Artist’s illustration of the SES-14 communications satellite above Earth
Posted inResearch Spotlights

A GOLDen Way to Study Space Weather

by Mark Zastrow 4 August 202029 September 2021

A NASA mission is observing airglow in the upper atmosphere and uncovering what it tells us about Earth’s space weather system.

Black and white photograph of a full solar eclipse
Posted inResearch Spotlights

Altitude Matters for Solar Eclipse Observations

by Morgan Rehnberg 23 July 202029 September 2021

The path of a solar eclipse through Earth’s ionosphere, which can be quite different than it is at ground level, appears to explain patterns of ionized particle depletions.

Observed ion energy and time-of-flight spectra in Jupiter's northern and southern hemisphere
Posted inEditors' Highlights

First Inside Look at Hot and Cold Ions in Jupiter’s Ionosphere

by A. Yau 23 September 201911 August 2022

The first in-situ ion observations from NASA’s Juno spacecraft reveal the surprising, simultaneous presence of cold protons and hot oxygen and sulfur ions in the high-latitude ionosphere of Jupiter.

Thunderclouds over the Mediterranean coast of Spain are illuminated by lightning
Posted inResearch Spotlights

Charging Thunderclouds Affect Ionospheric Conductivity

by David Shultz 6 September 2019

As thunderstorm updrafts strengthen, electrification of clouds can heat the lower ionosphere, explaining prolonged disturbances to radio waves in the rarefied atmospheric layer.

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

Holistic Views of the Nighttime Ionosphere

by M. Liemohn 22 July 201916 July 2019

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.

The Tvashtar volcano erupts on Io
Posted inResearch Spotlights

No Underground Magma Ocean on Jupiter’s Fiery Moon?

by E. Underwood 22 May 201911 May 2022

A new study suggests alternative explanations for Io’s unusual magnetic field.

Auroras seen from the International Space Station
Posted inResearch Spotlights

Bringing Clarity to What Drives Auroras

by Mark Zastrow 24 April 201911 August 2022

A new classification scheme helps researchers distinguish what accelerates the electrons that create auroras.

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RESEARCH SPOTLIGHTS
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“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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