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solar activity

Side-by-side drawings with concentric circles representing the Sun. In each diagram, several dark spots or clusters of dark spots have been marked to denote sunspot locations. The sketches have a date and time written on them.
Posted inNews

Sunspot Drawings Illuminate 400 Years of Solar Activity

by Daniella García Almeida 17 December 202517 December 2025

A new computational framework is helping scientists sift through centuries of scientific illustration of the Sun’s spotty surface.

A rocket launches in front of a clear sky
Posted inResearch & Developments

Trio of Space Weather Satellites Take Flight

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 24 September 202524 September 2025

These three satellites will that study the solar wind and its impacts.

A bright ring of light surrounds the North Pole in a black-and-white composite satellite image over the Northern Hemisphere, with land areas outlined in black.
Posted inResearch Spotlights

U.K. Space Weather Prediction System Goes Operational

by Saima May Sidik 23 June 202523 June 2025

Officials now have access to a suite of models they can use to head off damage to critical infrastructure.

Four seemingly identical, octagonal, disklike structures, each with several various thin antennas extending outward at various angles, appear to be floating in a closely spaced cluster in space. In the background, on the right side of the image, is the round shape of the planet Earth, encircled by translucent, overlapping blue and purple lines.
Posted inResearch Spotlights

New Insights into an Enigmatic Form of Magnetic Reconnection

Sarah Stanley, Science Writer by Sarah Stanley 11 April 202511 April 2025

A new study deepens understanding of magnetic field behavior recently discovered by NASA in Earth’s magnetosphere.

Diagram from the study.
Posted inEditors' Highlights

Fast Flows in Earth’s Magnetotail Surveyed by NASA Satellites

by Mary Hudson 9 April 20253 April 2025

A survey of high-speed electron flow observed by NASA satellites in the Earth’s magnetotail is presented and related to the process of magnetic field line reconnection and particle acceleration.

Composite image of a solar eruption
Posted inNews

Watching a Solar Event from All Angles

by Collin Blinder 2 January 20252 January 2025

A fleet of spacecraft captured unprecedented details of the major solar outbursts in May and June 2024.

A huge prominence shoots out into space from the surface of the Sun. The Sun’s surface and the erupted material appear to be various fiery shades of orange, red, and yellow, and the Sun’s curved horizon appears in the distance against the blackness of space, highlighting just how big the eruption is.
Posted inResearch Spotlights

Blasts from the Past: New Insights from Old Space Storms

Sarah Stanley, Science Writer by Sarah Stanley 24 October 202424 October 2024

Reassessment and comparison of past space weather events highlight the potential for Earth to experience destructive geomagnetic disturbances.

Two drawings by astronomer Johannes Kepler of circles with black dots indicating sunspots
Posted inNews

Kepler’s Drawings Might Reveal When the Sunspots Disappeared

by Matthew R. Francis 3 September 20243 September 2024

Johannes Kepler’s landmark 1607 sunspot observations may have been made at the end of the solar cycle, helping constrain the start of the Maunder Minimum.

An artist’s depiction of the Sun, Earth, and the space between them. Dots on Earth mark the locations of ground-based instruments for monitoring space weather.
Posted inResearch Spotlights

From Sun to Earth: A New Network for Comprehensive Space Weather Monitoring

by Nathaniel Scharping 22 August 202422 August 2024

The Chinese Meridian Project combines hundreds of instruments for a detailed, three-dimensional view of the solar-terrestrial environment.

A 360° image of the night sky with a dark green hue
Posted inNews

Scientists Captured the First Glimpse of a Rare Polar Aurora

Javier Barbuzano, Science Writer by Javier Barbuzano 8 August 20248 August 2024

After a decade-long search, scientists captured a type of elusive aurora on camera.

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