[26] 1. During the period of preparation of carpet earthquakes with M >6, according to the data obtained at Kokubunji station, the groups of spikes are singled out in the ionospheric parameters with duration 2-3 hours which are observed within the same day in the Es and F2 layers with the excess of 20% of the median value for the frequencies and the height of 10 km for the Es layer. Their appearance within 1-6 days prior the earthquake allows us to refer them to the medium-term precursors of the earthquakes.
[27] 2. The advance time T of the appearance of moderate-term earthquake precursors and the value of the deviations in ionospheric parameters identified as earthquake precursors are found to be related be a logarithmical relation to the earthquake magnitude and the distance from the observational point to the epicenter. Using those relations, one is able to estimate the time and the power of the earthquake in preparation in the particular geographic region.
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