Divergence (larger than 0.0002876 s^-1 in each frame) integrated over 7 days of observations (left). Identical plot with values higher than 0.000342 s^-1 over the 7 days (right). We note in the right upper corner a lower density of the stronger divergence due to the magnetic activity at that location during the 7 days of the sequence. We also note the same density below a latitude − 20° in the bottom right corner, but the magnetic field was only active for 2 days.