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aurorae

A cylindrical spacecraft with two rectangular wings hovers above a gray planet with purple mist rising from it.
Posted inNews

Dramatic Flyby Confirms That Mercury’s Radioactive Aurora Touches the Ground

by Matt Hrodey 1 August 20231 August 2023

Data collected by the BepiColombo spacecraft traces the causes of the strange aurora, which course through the planet’s weak magnetosphere.

Photo looking down on Earth from a satellite, showing red and green streaks flickering in the atmosphere
Posted inNews

Eavesdropping on the Vibrations of Earth’s Magnetic Bubble

by Erin Martin-Jones 9 May 202316 May 2023

A NASA-funded crowdsourced science project has converted the unheard sounds resonating inside Earth’s magnetic shield into audible tracks, revealing an orchestra of whistles, wooshes, and chirps.

Swirling cloud bands in Jupiter’s northern hemisphere
Posted inNews

Could Jupiter’s Heat Waves Help Solve a Planetary Energy Crisis?

Tim Hornyak, Science Writer by Tim Hornyak 9 November 202217 February 2023

Infrared observations reveal that Jupiter’s upper atmosphere is much warmer than models predict. The discovery may be a clue to finding missing heat sources in other giant planets.

Posted inEditors' Highlights

Origin of Dawnside Subauroral Plasma Flows in Geomagnetic Storms

by Susan Trumbore 12 September 202218 October 2022

Geomagnetic storms induce fast plasma flows next to the aurora and affect space weather. Lin et al. explain the origin of a special “dawnside” plasma stream that occurs only during extreme storm events.

Side-by-side images show fish-eye-style photographs of a starry evening sky illuminated by different subauroral events. The left image shows a SAR arc, a reddish arc that spans the sky. Beneath the arc the sky transitions from bright green at the horizon to purple and is partially obscured by clouds. The right image shows a STEVE phenomenon. Part of the red SAR arc is still visible but is much fainter and more of a pink color than its original red. The green and purple sky is more muted in color, and more stars and the band of the Milky Way are now visible. In both images, the silhouette of some shrubs is visible.
Posted inResearch Spotlights

From SAR Arc to STEVE: An Atmospheric Evolution

by Alexandra K. Scammell 6 September 20227 September 2022

A new study reports the first observation of a stable auroral red arc evolving into a strong thermal emission velocity enhancement during a geomagnetic storm.

Allen Foster at the South Pole Telescope in summer 2019–2020
Posted inFeatures

Allen Foster: Greasing Telescope Gears During a 7-Month-Long Night

by Santiago Flórez 25 July 202222 December 2022

While overwintering in Antarctica, Foster maintains the South Pole Telescope facilities.

Three auroral images taken by a citizen scientist in Dunedin, New Zealand.
Posted inEditors' Highlights

Uncovering the Mysterious STEVE Aurora

by Gang Lu 7 June 202214 September 2022

Scientists present the first direct observations on the rapid evolution of a bright red auroral arc into a thin white-mauve arc known as STEVE.

Example of how, given the presence of aurora, an over-the-horizon radar based in Scotland might be used to track an aircraft at 10 km altitude in a region to the north.
Posted inEditors' Highlights

Can Aurora Enhance Radar Monitoring of Arctic Aviation?

by Michael A. Hapgood 2 February 202215 March 2022

Enhanced E-region ionization produced by the aurora can be used to reflect signals from over-the-horizon radars and thus enable those radars to better monitor aviation in Arctic regions.

An Isinglass sounding rocket launch from Poker Flat, Alaska
Posted inResearch Spotlights

Converting Auroral Observations into 3D Structures

by Morgan Rehnberg 3 January 20222 February 2022

Using 1D and 2D data sources as model constraints yields fine-scale insights into real-world aurorae.

Artist rendering of magnetic reconnection taking place in the Earth's magnetosphere
Posted inEditors' Vox

Hidden Atmospheric Particles Sculpt Near-Earth Space Environment

by S. Toledo, M. André, N. Aunai, C.R. Chappell, J. Dargent, S.A. Fuselier, A. Glocer, D.B. Graham, S. Haaland, M. Hesse, L.M. Kistler, B. Lavraud, W. Li, T. E. Moore, P. Tenfjord and S.K. Vines 22 September 202118 July 2023

Charged particles escape our atmosphere following Earth’s magnetic field and constitute a main source of matter that modulates Sun-Earth interactions.

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Research Spotlights

Tracing Black Carbon’s Journey to the Ocean

11 July 202510 July 2025
Editors' Highlights

The Power of Naming Space Weather Events

10 July 20258 July 2025
Editors' Vox

Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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