NASA scientists tracked a record-breaking solar radio burst that lasted 19 days [1].
This event challenges existing understanding of solar activity because radio bursts typically last only hours or a few days. The extreme duration provides new data on how the sun emits energy over extended periods.
The burst occurred from Aug. 21 to Sept. 9, 2025 [2]. Observations began in August 2025 [3], as NASA missions monitored the solar radio emission. The event persisted far longer than typical bursts, which usually conclude within a short window [4].
Prior to this observation, the record for the longest solar radio burst was five days [2]. The 2025 event nearly quadrupled that mark, stretching across nearly three weeks [1].
Scientists utilized multiple NASA missions to track the emission as it unfolded. By monitoring the burst for 19 days [1], researchers were able to capture the full lifecycle of the event. This level of persistence is rare in solar physics and suggests mechanisms for radio emission that may not be fully understood.
Detailed analysis of the data from the Aug. 21 to Sept. 9 period [2] will allow researchers to compare this burst against previous short-term events. This comparison is essential for refining models of solar behavior and predicting how such bursts might affect space weather.
“NASA scientists tracked a record-breaking solar radio burst that lasted 19 days.”
The discovery of a 19-day solar radio burst indicates that the sun is capable of sustained radio emissions far beyond what previous models predicted. Because solar activity can interfere with satellite communications and GPS signals, understanding the triggers for these long-duration events is critical for protecting global infrastructure from space weather disruptions.
