Postmidnight flows appear to be triggered by the same mechanism that drives more frequently observed evening flows.
aurorae
Posted inNews
Dramatic Flyby Confirms That Mercury’s Radioactive Aurora Touches the Ground
Data collected by the BepiColombo spacecraft traces the causes of the strange aurora, which course through the planet’s weak magnetosphere.
Posted inNews
Eavesdropping on the Vibrations of Earth’s Magnetic Bubble
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.
Posted inNews
Could Jupiter’s Heat Waves Help Solve a Planetary Energy Crisis?
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
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.
Posted inResearch Spotlights
From SAR Arc to STEVE: An Atmospheric Evolution
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.
Posted inFeatures
Allen Foster: Greasing Telescope Gears During a 7-Month-Long Night
While overwintering in Antarctica, Foster maintains the South Pole Telescope facilities.
Posted inEditors' Highlights
Uncovering the Mysterious STEVE Aurora
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.
Posted inEditors' Highlights
Can Aurora Enhance Radar Monitoring of Arctic Aviation?
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.
Posted inResearch Spotlights
Converting Auroral Observations into 3D Structures
Using 1D and 2D data sources as model constraints yields fine-scale insights into real-world aurorae.