Longest Solar Radio Burst Ever Detected Lasted Nearly Three Weeks (xataka.com)

• Longest solar radio burst ever measured: 19 days (Aug 21 – Sep 9, 2025).
• Detected by ESA's Solar Orbiter, confirmed by NASA's Wind, Parker Solar Probe, and STEREO-A.
• Type IV burst, likely fueled by three coronal mass ejections that supplied electrons.

"Four spacecraft confirmed the longest solar radio burst ever measured, lasting 19 days from August 21 to September 9, 2025. The type IV burst was first detected by ESA's Solar Orbiter and later confirmed by NASA's Wind, Parker Solar Probe, and STEREO-A. It was likely fueled by three coronal mass ejections that supplied electrons. Such bursts are harmless to Earth but help understand solar activity."