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.
ionospheres
Posted inEditors' Highlights
All Hands on Deck to Catch Ion Cyclotron Waves
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.
Posted inResearch Spotlights
A GOLDen Way to Study Space Weather
A NASA mission is observing airglow in the upper atmosphere and uncovering what it tells us about Earth’s space weather system.
Posted inResearch Spotlights
Altitude Matters for Solar Eclipse Observations
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.
Posted inEditors' Highlights
First Inside Look at Hot and Cold Ions in Jupiter’s Ionosphere
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.
Posted inResearch Spotlights
Charging Thunderclouds Affect Ionospheric Conductivity
As thunderstorm updrafts strengthen, electrification of clouds can heat the lower ionosphere, explaining prolonged disturbances to radio waves in the rarefied atmospheric layer.
Posted inEditors' Highlights
Holistic Views of the Nighttime Ionosphere
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
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 inResearch Spotlights
No Underground Magma Ocean on Jupiter’s Fiery Moon?
A new study suggests alternative explanations for Io’s unusual magnetic field.
Posted inResearch Spotlights
Bringing Clarity to What Drives Auroras
A new classification scheme helps researchers distinguish what accelerates the electrons that create auroras.