Intraday radio light curves (green: 15 GHz, red: 230 GHz) from the 2016 hypersoft state (first and last panels) and minor radio flare (middle panels). The colors are same as in Fig. 1. The 230 GHz light curve seems to present higher variability (see Figs. 3 and 4). The 15 GHz light curve presents some well-defined flares that last ~0.1 days, indicating a size scale of 3 × 10¹⁴ cm (well beyond the orbital scale).