All-Day Solar Radio Spectrograms Under Normal Ionosphere Conditions vs. X1.7 Solar Flare Aftermath (IMAGE)

New Jersey Institute of Technology

All-Day Solar Radio Spectrograms Under Normal Ionosphere Conditions vs. X1.7 Solar Flare Aftermath

Caption

OVRO-LWA radio data contrasts a quiet day (Sept. 29, 2025) with the hours after the X1.7-class flare recorded at 2:35 ET on Nov. 9. The type III radio bursts, shown in the radio dynamic spectrum (horizontal axis is UT time, vertical axis is frequency), appear nearly vertical bursts during stable ionospheric conditions. After flare-driven X-ray and UV radiation ionized the lower ionosphere and geomagnetic storms driven by the associated coronal mass ejections, these radio bursts became curved and chaotic, particularly at low frequencies (bottom of the plot).

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NJIT/OVSA Team

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