High-speed particles cause indentations in the magnetopause to form “throat auroras.”
ionospheres
Posted inResearch Spotlights
Understanding the Effects of Anthropogenic Space Weather
A large plasma hole generated by the vertical launch of the Formosat-5 satellite created temporary navigating and positioning errors of up to 1 meter, according to a new study.
Posted inEditors' Highlights
Evidence That Earth’s Forehead Controls the Wagging of its Tail
Yes, Earth has a tail, a magnetotail, and there is debate about how much Earth’s upper atmosphere plays a role in the controlling the dynamics of this region of space.
Posted inEditors' Highlights
Modeling Geospace: Quantifying the Known-Unknowns
Imperfect knowledge of high-latitude forcing of the coupled ionosphere-theremosphere system translates into uncertainty in the low-latitude and midlatitude response to a geomagnetic storm.
Posted inEditors' Highlights
New Observations of Mysterious Radar Echoes
Exploring the relationship between solar extreme ultraviolet radiation flux and 150-km radar echoes.
Posted inEditors' Highlights
Solar Wind Sets the Magnetosphere Ringing
A combination of data from satellites and ground-based instruments gives new insight into solar wind-magnetosphere-ionosphere interactions.
Posted inEditors' Highlights
New Insight into Ionospheric Feedback Instability
A new modeling effort could change our understanding of auroral arc formation.
Posted inResearch Spotlights
Jets of Ionospheric Cold Plasma Discovered at the Magnetopause
The lower-energy particles may play a larger role in magnetic reconnection than previously believed, influencing space weather near Earth.
Posted inResearch Spotlights
Is There a Greenhouse Effect in the Ionosphere, Too? Likely Not
Controversial observations of long-term changes in the ionosphere appear to be explained by the Sun’s 11-year cycle of activity, not human greenhouse gas emissions.
Posted inResearch Spotlights
Auroras May Explain an Anomaly in Earth’s Ionosphere
A new study finds that the ionospheric anomaly over the Weddell Sea is likely influenced by proximity to auroral energy input, rather than by tilting magnetic fields.