Time-distance diagrams of 193 Å channel taken along the horizontal cut y = 10 Mm (left) and the vertical cut at x = 0 Mm (right). The vertical axis in the left panel corresponds to the distance from the eruption. The white solid line in the right panel denotes the instantaneous center of the EFR. The gray lines in both panels denote the propagation according to the local phase speed of fast and slow magnetoacoustic waves.