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plasmas

Researchers unravel the mystery of an anomaly in Earth’s ionosphere
Posted inResearch Spotlights

Auroras May Explain an Anomaly in Earth’s Ionosphere

by E. Underwood 7 August 201723 January 2023

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.

Researchers look at Hubble images to spot secondary arcs of Jupiter’s aurora.
Posted inResearch Spotlights

Hubble Reveals Less Studied Regions of Jupiter’s Auroras

by S. Witman 25 July 201711 August 2022

With a dose of fiery plasma, the secondary arcs of Jupiter’s aurora shine bright.

Researchers use satellite data to spot how plasma waves affect the Van Allen radiation belts around Earth
Posted inResearch Spotlights

How “Whistling” Plasma Waves Shape Earth’s Radiation Belts

by Mark Zastrow 2 June 20171 March 2023

The Van Allen radiation belts surrounding Earth shrink and swell due to plasma waves moving through them, an analysis of satellite data suggests.

Researchers assess what happens when two plasmas of different temperatures meet
Posted inResearch Spotlights

Calculating Plasma Waves—With a Twist

by Mark Zastrow 27 March 201722 March 2023

What happens when two plasmas with different temperatures overlap? The answer depends on a quantum effect that twists the waves as they ripple through the sea of electrons.

Understanding how solar storms subside will help to improve future forecasting
Posted inResearch Spotlights

Scientists Probe the Calm After Solar Storms

by Mark Zastrow 21 March 201721 February 2023

In forecasting the effects of solar storms, understanding how they subside—and not just how they arrive—will be crucial.

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 identify the role of plasma waves where the magnetic fields of Earth and the Sun interact.
Posted inResearch Spotlights

Plasma Waves Pinpointed at the Site of Magnetic Reconnection

by Mark Zastrow 17 February 201710 March 2022

When the Earth's and the Sun's magnetic fields meet, they realign in explosive and mysterious reconnections. Data suggest that plasma waves called kinetic Alfvén waves play a key role.

Jupiter-auroras-plasma-magnetic-field-interaction
Posted inResearch Spotlights

Jupiter's Auroras Recharge Between Solar Storms

by Mark Zastrow 21 September 20164 May 2022

New research suggests that Jupiter's magnetic field replenishes its stock of plasma during lulls in solar activity, creating spectacular displays when a solar storm hits.

Posted inResearch Spotlights

Forecasting Space Weather Like Earth Weather

Leah Crane by L. Crane 19 August 201613 April 2022

Researchers find that as with terrestrial weather, ensemble forecasting—which uses several different models simultaneously—is the best way to produce accurate and precise forecasts of space weather.

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.

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