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Journal of Geophysical Research: Space Physics

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New research shows how lightning-triggered plasma waves in Earth's magnetosphere trigger processes that can threaten satellites
Posted inResearch Spotlights

How Lightning Creates "Killer Electrons" in Earth's Radiation Belts

by Mark Zastrow 14 March 201718 January 2023

New calculations show that lightning-triggered plasma waves in Earth's magnetosphere absorb energy from slow particles and energize electrons to levels that can damage satellites severely.

Researchers spot the cause of poleward boundary intensifications in Earth’s aurora
Posted inResearch Spotlights

Polar Interlopers in the Aurora

Leah Crane by L. Crane 9 March 201718 July 2023

A new study suggests that poleward boundary intensifications in the aurora are caused by fast flows of plasma from the poles into the auroral oval.

The Jicamarca Radio Observatory in Peru is up and running again after 50 years
Posted inResearch Spotlights

After Decades, High-Altitude Observations Revived at Jicamarca

by Mark Zastrow 2 March 201731 January 2022

Recent upgrades to the Jicamarca Radio Observatory in Peru allow it to probe electron densities several thousand kilometers above Earth, a feat it hasn't accomplished in 50 years.

A researcher examines the methods behind a rocket launched in 1966 to measure electric fields in space.
Posted inResearch Spotlights

Retracing the First Spaceborne Electric Field Measurement

by Mark Zastrow 4 January 201724 October 2022

Fifty years ago, a sounding rocket made history by taking the first measurement of an electric field in space. What techniques were used to capture this data?

Researchers look at the link between ice shelf vibrations and atmospheric ripples.
Posted inResearch Spotlights

Buzzing Ice Shelf Makes Waves in the Air Above

by Mark Zastrow 7 December 201619 October 2021

The resonant vibrations of the Ross Ice Shelf in Antarctica are disturbing the atmosphere above it, creating huge ripples.

Posted inResearch Spotlights

What Drives Variation in the Ionosphere’s Electron Density?

by K. J. Knizhnik 22 September 201625 August 2022

The long-term trend in the electron density of the ionospheric F layer may be natural, not man-made.

Posted inResearch Spotlights

Scientists Map Temperature and Density in Earth’s Exosphere

by W. Yan 23 August 201626 October 2021

Data from multiple orbiters give a clearer picture of how density and temperature interact and what that could mean for future satellite missions.

A new model helps point the way towards determining whether there is lightning on Venus.
Posted inResearch Spotlights

Searching for Lightning's Signature on Venus

Shannon Hall by S. Hall 10 August 201613 April 2023

How energetic would lightning on Venus have to be to be detected by sensors? A new model sheds light.

CASSIOPE-satellite-measure-Earth-atmosphere-ionosphere
Posted inResearch Spotlights

Tracking Ions at the Edge of the Atmosphere

Leah Crane by L. Crane 2 August 20165 July 2022

The first results from a recently launched satellite hold promise for studying solar storms, the very top of Earth's ionosphere, and how the atmosphere is evolving.

Posted inResearch Spotlights

Mysteries of the Magnetosphere

by W. Yan 14 July 201616 November 2021

Scientists investigate how dipolarization fronts in Earth's protective magnetosphere interact with the environment around them.

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