Determination of source parameters of strong earthquakes of Kamchatka, the Kurile Islands, and Japan from aftershock sequences

Abstract

Aftershock sequences of some strong earthquakes of Kamchatka, the Kurile Islands, and Japan are examined. Such source parameters as the length L, along-dip width W, motion on fault D, and stress drop Δσ are determined from the aftershock sequences considered. The values of these parameters were obtained by the formal estimation of linear source parameters (lower bound estimates) and visually (upper bound estimates). The correlation dependences of the obtained parameters on the surface wave (MS) and seismic moment (MW) magnitudes are calculated.