Comparison of observed spectra and inversion results in the time series. Left panel, top to bottom: spectra from three different locations along the slit versus (vs.) time. The upper row corresponds to a network location. First column: observed spectra. Second column: best-fit spectra. The third column shows the temperature stratifications vs. log τ, the fourth column the simultaneous Stokes V spectra of the 630 nm channel. The white rectangle in the second row marks the section shown magnified on the right-hand side. A train of three consecutive brightenings passes from the line wing towards the line core between t = 300 s and t = 800 s.