Figure 3. RTL plots before the three strong earthquakes of Kamchatka of 1992-1993 period: a) on March 2, 1992 (52.92o N; 159.89o E; H =41 km; M =7.1); b) on June 8, 1993 (51.25o N; 157.77o E; H =82 km; M =7.4); c) on November 13, 1993 (51.79o N; 158.83o E; H =40 km; M =7.1). The value of the RTL parameter is shown in units of the mean square deviation s , calculated from the data for the whole observation period since 1962.