High-resolution view of the target region from the first SST/TRIPPEL-SP scan (07:37–07:54 UT), taken just before the flare starts. From left to right: Intensity in the far wing of Ca II 8542 Å (photosphere); outer wing (upper photosphere); inner wing (lower chromosphere); at the line core (mid-chromosphere). The last two panels show Stokes V maps in the photospheric Fe I 8526.67 Å line and the chromospheric Ca II 8542 Å line, respectively. The black arrows indicate the solar north and disk center. The horizontal axis corresponds to the scan direction (left to right). All panels are in units of the average quiet Sun continuum intensity.