Simulated magnetic transients. Left panels: events of transient flux emergence in a plage simulation. Each row (numbered 1–3) tracks the evolution of flux emergence in granules from the respective areas marked in Fig. 4. The vertical component of the magnetic field is saturated at ±300 G. Right panels: display the spatial association of the photospheric horizontal magnetic field and the vertical component of the Poynting flux. These snapshots correspond to those displayed in the left panels. Shown in grayscale is the vertical component of the Poynting flux. The blue and red contours outline regions with a horizontal magnetic strength of 400 G and 600 G, respectively. These snapshots roughly correspond to the average τ₅₀₀ = 1 surface. See Sect. 3 for details.