The aim of this paper is to examine the anomalous variations of the critical frequency (f_oF2), total electron content (TEC), and f_oE_s parameters before earthquake occurred on 1 April 2014 near Iquique Chile (M=8.2) and event on 25 October 2013 in Japan (M=7.1). Using the bound method we analyzed the variations of f_oF2, TEC, f_oE_s and N_mF2 parameters. The anomalous variations in f_oF2, TEC, f_oE_s and N_mF2 parameters observed 1 day, 15 days, 4 days and 1 day prior to Chile event and anomalous variations in f_oF2, TEC and f_oE_s observed 3 days, 3 days and 2 days prior to earthquake event of Japan.