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NASA’s PUNCH mission, launched in 2025, uses four spacecraft to continuously track solar eruptions from the Sun to near-Earth space. In a first test, scientists predicted the arrival of a May 31, 2025 coronal mass ejection within 30 minutes, a significant improvement over the current 5-hour uncertainty window. The mission’s wide-field imagery enables real-time tracking, capturing images every four minutes to monitor solar storms throughout their journey. Craig DeForest, PUNCH principal investigator, called the result "stunning," comparing it to a major leap in forecasting capability.

The test involved inputting PUNCH’s continuous imagery into a computer model to analyze the solar eruption’s speed and geometry. Twelve hours after the eruption left the Sun, the model predicted an arrival time eight hours later, accurate to within 30 minutes. This represents a tenfold improvement over existing methods, which rely on limited tracking data. The model also indicated when the prediction stabilized, providing forecasters with confidence in the timing. DeForest noted the achievement was based on a basic process, emphasizing the value of continuous tracking over the solar system.

Beyond forecasting, PUNCH’s high-resolution images revealed new details about coronal mass ejections, showing they are clumpier and evolve as they travel. The data also improves understanding of plasma movement in space, offering insights into galactic plasma behavior, such as in star-forming regions. These findings enhance both space weather prediction and fundamental solar physics research. The mission’s continuous observations fill a critical gap in tracking solar storms from their origin to near-Earth space.

Southwest Research Institute leads the PUNCH mission, operating its four spacecraft from Boulder, Colorado, while NASA’s Goddard Space Flight Center manages the mission. The Science Mission Directorate at NASA headquarters oversees the project. The initial success highlights PUNCH’s potential to transform space weather forecasting and deepen scientific understanding of solar phenomena.