OVSA-LWA Spectroscopy AI Summary for 2026/04/09

Section: Summary
The solar radio activity on 2026-04-09 was extremely quiet. Solar tracking by the OVRO-LWA array began at approximately 13:34 UTC, marked by a sharp transition in the spectrogram. Following the start of tracking, the data showed a stable background flux level generally ranging between 0.5 and 2 sfu across the 20–80 MHz frequency band.

No significant solar radio bursts were observed throughout the day. A few marginal, very weak features resembling Type III bursts occurred between 21:48 and 21:55 UTC (Image 17), but their peak intensities remained near or below 1 sfu, well below the 10 sfu detection threshold. Various broadband vertical spikes appearing in the later UTC hours (e.g., Images 18, 21, and 22) are characteristic of terrestrial radio frequency interference (RFI).

Section: Events
Event # | Begin UT | Peak UT | End UT | Freq Range | Peak Flux | Type | Spectrogram URL
No events above 10 sfu were detected.