Fig. 5.
Retrieved magnetic field in the photosphere (left column) and chromosphere (right column) during the flare. Top row: photospheric magnetogram retrieved from a Milne-Eddington inversion of the Fe I line (left), and chromospheric magnetogram obtained from the WFA for the Ca II 8542 Å line around the flare peak time (08:46 UT; right). Second row: temporal evolution of the mean longitudinal and transverse magnetic flux in the green box. Third row: mean LOS magnetic field evaluated for the pixels located in the green box. Bottom row: histograms of the LOS magnetic field change (> 50 G) observed in the photosphere and the chromosphere at the flare peak time.
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