TWO SMALL EARTHQUAKE SWARMS AT MIAODAO ARCHIPELAGO, SHANDONG PROVINCE, IN SPRING 1976

In this paper the characteristics of two small earthquake swarms at Miaodao Archipelago, Shandong in Spring 1976, have been analysed. Earthquake source parameters, of a part of both swarms, velocity ratio, amplitude ratio of P, S waves and focal mechanism solutions are given. Finally, these two small earthquake swarms are compared with the foreshock sequence of the 1975 M=7.3 Haicheng earthquake for their difference and similarity.