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19-Day Solar Radio Burst Sets Record, Links to CMEs

5/20/2026

Summary

Story summary

U.S. scientists reported a Type IV solar radio burst that lasted 19 days, beginning on August 21, 2025, the longest ever recorded.
Researchers tracked the burst using Solar Orbiter, Parker Solar Probe, Wind and STEREO-A, and placed its source near a helmet streamer.
The team at NASA's Goddard Space Flight Center linked three coronal mass ejections to the prolonged emission and published the results in The Astrophysical Journal Letters to aid space-weather forecasting.

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Story summary

U.S. scientists reported a Type IV solar radio burst that lasted 19 days, beginning on August 21, 2025, the longest ever recorded.
Researchers tracked the burst using Solar Orbiter, Parker Solar Probe, Wind and STEREO-A, and placed its source near a helmet streamer.
The team at NASA's Goddard Space Flight Center linked three coronal mass ejections to the prolonged emission and published the results in The Astrophysical Journal Letters to aid space-weather forecasting.