Scientists Track Solar Monster That Sparked Strongest Storms in Decades

Unprecedented Solar Surveillance

For the first time in history, scientists have tracked a single solar region continuously for three months as it unleashed the most powerful space weather events in over two decades. Scientists pulled back the curtain on one of the most extreme solar regions seen in decades, tracking it almost nonstop for three months as it unleashed powerful space weather. By combining views from two spacecraft—one near Earth and one orbiting the Sun—researchers followed a massive active region as it grew, twisted, and ultimately triggered the strongest geomagnetic storms since 2003.

The breakthrough came from coordinating two spacecraft positioned on opposite sides of the Sun. The scientists combined observations from two different spacecraft to create a much more complete picture of NOAA 13664. Solar Orbiter, launched in 2020, moves around the Sun on a six-month path, so its cameras can see parts hidden from Earth. Solar Dynamics Observatory provides a steady Earth-side view, giving full-disk images whenever the Sun's near side faces us. This dual perspective allowed researchers to monitor the solar region even when it rotated away from Earth's view.

Between April and July 2024, Solar Orbiter captured detailed observations of one of the most intense solar regions seen in the past two decades. In May 2024, this region, known as NOAA 13664, rotated into view from Earth and immediately made its presence known. It went on to trigger the strongest geomagnetic storms to hit Earth since 2003.

Global Chaos and Spectacular Displays

When NOAA 13664 faced Earth in May 2024, the consequences were both beautiful and disruptive. This region caused the spectacular aurora borealis that was visible as far south as Switzerland. The northern lights appeared in places where they're rarely seen, creating a global spectacle that captivated millions.

But the visual wonder came with serious technological disruption. Even signals on railway lines can be affected and switch from red to green or vice versa. That's really scary. The implications extend far beyond transportation systems. Modern digital agriculture was particularly affected. Signals from satellites, drones and sensors were disrupted, causing farmers to lose working days and leading to crop failures with considerable economic losses.

The space industry wasn't spared either. One recent example occurred in February 2022, when 38 of 49 Starlink satellites belonging to US space company SpaceX were lost just two days after launch due to heightened solar activity. Such losses demonstrate how vulnerable our increasingly connected world has become to solar outbursts.

Understanding the Solar Beast

What makes NOAA 13664 particularly fascinating is its unprecedented magnetic complexity. Across three solar turns, instruments recorded 969 flares from the active region, ranging from small bursts to major events. Daily magnetograms, maps of magnetic strength on the Sun, showed where opposite polarities crowded together inside the active region. At boundaries where the magnetic field flips direction, twisted lines can reconnect, releasing stored energy as flares.

The research team tracked how the region's magnetic field became increasingly tangled over time. Thanks to data from space probes, researchers were able to track three solar rotations for the first time ever, observing how the magnetic field of a superactive region developed over several episodes, becoming increasingly complex. Ultimately, an intertwined magnetic structure was formed, before the strongest flare in the past twenty years was released on the far side of the sun on 20 May 2024.

Preparing for Future Solar Storms

This comprehensive study offers hope for better space weather prediction. When we see a region on the sun with an extremely complex magnetic field, we can assume that there is a large amount of energy there that will have to be released as solar storms. However, scientists acknowledge significant challenges remain in forecasting the exact timing and intensity of solar eruptions.

The European Space Agency is developing new tools to improve predictions. We're currently developing a new space probe at ESA called Vigil which will be dedicated exclusively to improving our understanding of space weather. The European Space Agency plans a new probe called Vigil to watch the Sun from the side and improve space weather warnings. The mission is planned for launch in 2031. This mission could provide crucial early warnings for future solar storms.

As our dependence on technology grows, understanding solar behavior becomes increasingly critical. That extra lead time supports earlier planning for satellite operators, power grid managers, and airlines that reroute to reduce radiation. Reliable forecasts let operators move satellites to safer modes, postpone launches, and check power networks for risky currents. The lessons learned from NOAA 13664 may prove essential for protecting our technological civilization from the Sun's next great outburst.