A significant anomaly was observed in the ionogram at Kazan, Russia, following the 2010 M8.8 Chile earthquake, which was caused by vertical ground motions of Rayleigh waves and the resulting acoustic waves propagating upward. The anomaly was characterized by steep satellite traces for which the range increased rapidly with frequency. The inclined ionospheric density perturbation caused oblique returns of sounding radio waves in addition to the nearly vertical returns of the main trace.