Аннотация:The existence of consistent, significantly extended (up to 4–7 years) intervals of positive (up to+0.8) and negative (up to –0.8) correlations between the time series of the numbers of weak earthquakes (with M ≥ 3) in spatial samples far enough apart from each other within the Zagros (Iran) and the North Anatolian (Turkey) fault systems is established. This result can be considered a manifestation of the remote interaction of seismicity within the territory under consideration. From observations of phase shifts of about 1.5 years between neighboring pairs of Iranian and Turkish samples, the centers of which are located at a distance of about 250–300 km, the rate of propagation of this interaction in the direction from east to west can be presumably estimated as about 200 km/yr. This value is in satisfactory agreement with the migration rate of earthquake sources in the range of 5–150 km/yr according to numerous estimates in the literature