predict solar – A new study of an X-class solar flare on October 3, 2024 finds changes near the sun’s surface beginning three hours beforehand—temperature, turbulence, and plasma motion rise gradually, then jump about 20 minutes before the eruption. The patterns also show reg
When the Sun turns its face toward an eruption, it may leave a trail of clues hours in advance.
In a paper submitted May 8 to arXiv.org. solar physicist Louis Seyfritz of the New Jersey Institute of Technology in Newark describes how his team used space-based observations to watch an active region building toward a major event—an X-class solar flare on October 3. 2024. Seyfritz frames the goal plainly: “If we can predict when a huge solar flare … is going to happen. that means we can protect [astronauts] from any harmful radiation.”.
The warning matters beyond spacewalks and spacecraft crews. The study points to the possibility of developing methods to predict future solar flares, which could give experts time to protect Earth’s power grid, orbiting satellites, and astronauts in space.
Seyfritz and colleagues focused on one of the Sun’s active regions that had already shown it could erupt. It emitted a strong flare a few days earlier. and on October 3. other scientists trained NASA’s Interface Region Imaging Spectrograph space telescope on a single point within that active region—aiming to catch a flare in the act.
What the telescope watched was light tied to specific physics in the Sun’s atmosphere. The instrument tracked changes in the light emitted by the silicon IV ion, which traces plasma in the transition region between the sun’s surface and corona.
The most tantalizing part of the work is what it suggests about the moments before the big release. “One of the biggest questions about flares is what triggers them,” solar physicist Emily Mason of Predictive Science Inc. in San Diego said, adding she was not involved in the new work. “In nature. most systems like to remain stable. so what makes the magnetic field on the sun destabilize to the point that runaway energy release is the next step?” Mason called observations like this “critical to tease out that trigger.”.
In Seyfritz’s analysis, the lead-up to the October 3 eruption was anything but silent. The team found three key parameters—features of the light that probe plasma’s temperature. turbulence. and movement toward or away from the sun’s surface—rose gradually starting three hours before the flare as the region accumulated energy.
Then, about 20 minutes before the flare, the behavior sharpened abruptly. The temperature and turbulence jumped. The plasma’s speed away from the sun also increased.
The study also reports a rhythm in the ramp-up. Over the three hours preceding the flare, the parameters varied periodically, with consistent ups and downs every 8 minutes and 20 minutes. During the final hour before the flare, tracers of temperature and turbulence changed in sync.
Mason said the oscillations seem to connect to how the light is measured. The two oscillations appear to vary with the measured light wavelength: shorter wavelengths show the 8-minute period. while longer wavelengths show the 15-minute period. For Mason, that pattern is a clue in itself. “That hints that there could be two different physical mechanisms happening in the plasma,” she said.
At the same time, she cautioned that excitement doesn’t replace proof. The work is both “interesting and important. ” Mason said. but there are many steps between these observations and practical solar flare predictions. She pointed to one concrete test: it would be good to check whether similar oscillations show up in an active region that isn’t about to erupt.
There’s also a more immediate obstacle: turning a signature seen from a single viewpoint into something forecast-ready. Mason said the technology exists, but the end-to-end requirement is demanding. “I am confident that the oscillations reported here have the ability to predict major flares. but we would need a mission that could observe the whole sun at once (and probably be able to conduct the analysis onboard) in order to be useful in a predictive capacity. ” she said. “The technology exists. It’s a matter of funding.”.
For now. the October 3 observations offer something rare in solar physics: a glimpse of how a flare’s machinery can look before the blast. Three hours of building pressure. a roughly 20-minute ramp-up with sudden shifts in temperature. turbulence. and outward plasma speed. and repeated pulses in the light—all of it suggests the Sun may not be entirely cryptic. It may just be waiting to be watched differently.
solar flares space weather X-class flare silicon IV transition region arXiv Interface Region Imaging Spectrograph solar physics predictions satellites power grid astronauts