Researchers have successfully utilized continuous imagery from NASA’s Polarimeter to Unify the Corona and Heliosphere (PUNCH) mission to forecast the arrival of a solar eruption at Earth with a margin of error of just 30 minutes. These findings, presented at the Committee on Space Research Scientific Meeting, suggest a major advancement in the ability to predict space weather, which can impact satellites, power grids, and astronauts.
Coronal mass ejections (CMEs)—massive solar explosions—have historically been difficult to track continuously as they travel through the solar system. Prior to the 2025 launch of PUNCH, scientists could only observe these events during the initial portion of their journey, often relying on estimates for the remainder of the distance. PUNCH, which consists of four spacecraft in low Earth orbit, provides a continuous, wide-field 3D view of the inner solar system, capturing new imagery every four minutes.
In a retroactive test, scientists applied data from a May 31, 2025, solar eruption to a computer model. By analyzing the CME's geometry and speed, the model predicted the storm's arrival within 30 minutes of the actual event. This represents a tenfold improvement over current forecasting methods, which typically operate within a five-hour window. Craig DeForest, the mission's principal investigator at the Southwest Research Institute, described the leap in capability as comparable to moving from steam engine technology to modern internal combustion.
Beyond improved forecasting, the high-resolution data has provided new scientific insights, revealing that solar material clouds are more complex and clumpier than previously understood. The mission is also offering researchers a better look at how plasma behaves as it moves through space, which may assist in broader astrophysical studies. The PUNCH mission is led by the Southwest Research Institute and managed by NASA’s Goddard Space Flight Center.
Source: NASA
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