地震时空分布的不均匀性早已被我们所认识,这种活动强烈与相对平静的相间性反映了地球内部大范围的应力积累、释放和调整的节奏,而这样富有韵律性的事实可能与地球外界及内部的富有韵律性的力相对应。为此,客观地划分地震幕对深入研究地震活动性,并进而探索地震的成因是有益的。 The heterogeneity of the temporal and spatial distribution of earthquakes has long been recognized by us. The strong and relatively calm interplay of these activities reflects the wide range of stress-accumulated, released and adjusted rhythms within the Earth. Such rhythmic facts may be related to the Earth’s external environment And the internal rhythmic force corresponding. For this reason, it is beneficial to objectively divide the seismic curtain to deeply study the seismic activity and then to explore the causes of the earthquake.