A colossal solar flare, captured in October 2022 by the European Space Agency’s (ESA) Solar Orbiter, unveiled a never-before-seen phenomenon: a plasma cyclone stretching up to 2 million kilometers high. The event, recorded over eight hours at the Sun’s north pole, stemmed from a coronal mass ejection (CME) that released billions of tons of superheated gas. Images, released in March 2025, show a spiraling jet, dubbed a “twisted flux rope,” offering clues to how the Sun unleashes magnetic energy. By blocking the Sun’s intense light, the probe’s coronagraph revealed the corona, a feat previously limited to solar eclipses. Detailed in The Astrophysical Journal, this event underscores the Sun’s complex magnetic fields. The discovery enhances our understanding of solar dynamics and space weather forecasting. Key aspects include:
- Immense scale: The cyclone reached up to 2 million kilometers.
- Extended duration: Visible for over three hours.
- Magnetic origin: Driven by a reconnection event in the corona.
- Scientific value: Sheds light on solar energy release.
Roots of the solar cyclone
The cyclone formed through magnetic reconnection, where magnetic field lines snap and realign, releasing explosive energy. The October 2022 CME triggered this, expelling plasma in a spiral pattern. Unlike typical dispersions, the plasma created a swirling “pseudostreamer” structure, driven by magnetic fields acting like elastic bands. The Solar Orbiter’s Metis coronagraph, which blocks direct sunlight, captured the event, revealing the corona’s dynamics. This occurred near the solar maximum, a peak in the Sun’s 11-year cycle that began in 2024, marked by heightened activity.
Magnetic reconnection is a core solar process. When open and closed magnetic lines interact, the released energy accelerates particles, forming jets like the one observed. The event’s intensity shaped the plasma into a twisted tube, rising radially from the Sun.
Role of Alfvén waves
Alfvén waves, oscillations traveling along magnetic field lines, played a key role in the cyclone’s motion. Predicted by Hannes Alfvén in 1942, these waves shape the solar wind, a stream of particles flowing from the Sun. In this event, they amplified the plasma’s spiraling motion, creating a complex structure. The Solar Orbiter’s data showed how magnetic fields aligned during the jet’s ascent, offering insights into energy propagation.
- Wave function: Accelerates and shapes plasma in solar events.
- Solar wind impact: Influences particle dispersion in space.
- Unique observation: The cyclone’s scale highlighted wave dynamics.
- Probe data: Confirms plasma-magnetic interactions.
These findings could refine space weather models, as solar events impact Earth’s communications and power grids.
Technology behind the capture
The Solar Orbiter, a joint ESA-NASA mission launched in 2020, carries six imaging and measurement instruments. The Metis coronagraph was critical, blocking the Sun’s glare to reveal the corona. The footage, recorded on October 12, 2022, spanned eight hours and was processed to highlight the spiral structure. The upcoming Proba-3 mission, set for 2031, will enhance such observations with high-resolution corona imaging.
The ability to study the corona without an eclipse is a breakthrough. Metis mimics eclipse conditions, capturing faint plasma light. This enabled detailed views of the cyclone, a rare achievement in solar observation.
Potential effects on Earth
While this cyclone didn’t directly impact Earth, similar solar events can cause disruptions. CMEs release particles that trigger geomagnetic storms, which may:
- Disrupt satellites: Damage circuits and navigation systems.
- Affect power grids: Risk widespread blackouts.
- Create auroras: Visible at unusual latitudes during solar peaks.
- Impact communications: Cause radio blackouts, as seen in 2025.
On May 14, 2025, a class X2.7 flare caused radio blackouts across Europe, Asia, and the Middle East. The current solar cycle’s intensity raises the likelihood of such events.
Advances in solar research
The cyclone’s capture underscores the Solar Orbiter’s value. Orbiting 42 million kilometers from the Sun, the probe maps stellar dynamics. The Astrophysical Journal study details how the event clarifies magnetic energy release. Reconnection, combined with Alfvén waves, drives complex phenomena affecting space weather.
The Sun’s activity has surged since 2024’s solar maximum. On June 17, 2025, a sunspot triggered multiple flares, including an M8.46, nearing the most powerful X-class. These events highlight the need for ongoing research.
Future of solar observation
The Solar Orbiter is part of a broader effort. The ESA’s Proba-3, launching in 2031, will use two satellites to create an artificial coronagraph for detailed corona imaging. India’s Aditya-L1 mission studies CMEs in real time, complementing these efforts.
- Proba-3 mission: Dual-satellite coronagraph for high-resolution images.
- Aditya-L1: Monitors CMEs and solar flares.
- Solar Orbiter: Combines imaging and in-situ solar wind data.
- Vigil (2031): Detects early signs of hazardous solar activity.
These missions are vital for predicting space weather events that threaten Earth’s infrastructure.
Risks of superflares
Beyond cyclones, scientists warn of rare superflares, releasing energy equivalent to billions of atomic bombs. A December 2024 Science study from the Max Planck Institute suggests these occur every century in Sun-like stars. Tree ring evidence points to superflares in 775 AD and 993 AD. A modern superflare could:
- Collapse power grids: Damage transformers, causing long-term outages.
- Destroy satellites: Disrupt communication and navigation.
- Endanger aviation: Increase radiation at high altitudes.
- Economic losses: Trillions in global damages.
Valeriy Vasilyev of Max Planck estimates the next superflare between 2050 and 2060.
Need for continuous monitoring
The solar cyclone highlights the importance of constant observation. The Vigil mission, planned for 2031, will detect early solar activity, enabling preventive measures. Data from Solar Orbiter, Proba-3, and others will improve space weather forecasting, protecting critical infrastructure.
The Sun’s 11-year cycle, now at its peak, drives intense events like the plasma cyclone. Ongoing research is essential to decode these phenomena and mitigate their risks.
