Scatter map of around 16 min of band-pass filtered phase L_G-F combination from ground GNSS stations of Chilean and Argentinian networks (black triangles), recalculated to TEC units, on September 10, 2015. Larger dots indicate Swarm B along-track power spectrum of LP ED disturbances sampled from the spectrogram at 50 s. Magenta square is the last Swarm position indicating the direction of flight. Blue lines are tectonic plate boundaries. Black rectangles indicate places of the most evident TID. Yellow triangle is the epicenter of Chile-Illapel EQ.