Having analyzed preliminarily formation mechanism of these common characteristics of anomaly , it concludes that : these are results , controlled by basically united tectonic stress field of large - range , caused by stress - strain accumulation and certain phase strong earthquakes , according to deformation difference brought about in tectonic position along the boundary zone and within second - order faults of active blocks resulted from unstable and inharmonious features for movement of block system at different levels and deformation of boundary 分析這些異常共性特徵的形成機制,初步認為:是在基本統(tǒng)一的大區(qū)域構(gòu)造應(yīng)力場控制下,不同層次塊體系統(tǒng)運動及其邊界帶變形的非平穩(wěn)、非協(xié)調(diào)性,在活動地塊邊界地帶和地塊內(nèi)部次級斷裂構(gòu)造部位產(chǎn)生變形差異而導(dǎo)致應(yīng)力-應(yīng)變積累、孕育強震到一定階段的結(jié)果。