Images on 13 April 2019. (a) Solar disk at 171 Å (SDO/AIA) and contours of brightness temperature at 50, 60, 70 MHz at half height at 06:48; (b) AR 12635 in soft X-rays (XRT/Hinode) at 06:04 and 06:24 (box in the upper right corner) together with the line of sight magnetic field component (±100, ±300, ±1000, ±1500 G). Red and blue contours show positive and negative components, respectively. White contours at (0.2, 0.5, 0.9)×0.6 MK corresponds to brightness temperature at 6.25 GHz (SRH) in intensity at 05:44:49. The SRH beam width is 52×35 arcsec. Black solid and dashed contours indicate the brightness temperature in the right and left polarization, respectively. The levels are (0.5, 0.7)×2.8×10⁴ K and −(0.7, 0.5)×1.6×10⁵ K. The pink and green frames bound the frames for the 171 Å and 304 Å profiles in Fig. 3c.