青藏高原东南缘M≥3.0及M≥4.0地震平静嵌套图像与强震活动分析  

Analysis of Seismic Quiescence Nesting Phenomenon for M≥3.0 and M≥4.0 and Strong Earthquake Activities along the Southeastern Margin of the Qinghai-Xizang Plateau

作　　者：孔令喆 祁玉萍[1] 宫悦[1] 宿君 陈梦蝶 KONG Lingzhe;QI Yuping;GONG Yue;SU Jun;CHEN Mengdie(Sichuan Earthquake Agency,Sichuan Chengdu 610041,China)

机构地区：[1]四川省地震局,四川成都610041

出　　处：《四川地震》2025年第2期7-13,共7页Earthquake Research in Sichuan

基　　金：四川省地震局地震科技专项(LY2504)。

摘　　要：通过选取1970年以来中国地震台网记录到的M≥3.0地震,对青藏高原东南缘的M≥3.0及M≥4.0地震平静嵌套现象与强震活动进行了研究。发现该区域在强震发生前,通常会形成M≥3.0及M≥4.0地震平静嵌套的空间格局。通过进一步分析研究,得出如下结论:青藏高原东南缘历史上共有8次长时间的M≥3.0及M≥4.0地震平静嵌套现象,后续均对应有M≥6.0地震,未来的强震一般发生在M≥4.0地震平静区域内部,M≥3.0地震平静区域边缘;在M≥3.0及M≥4.0地震平静之后,存在强震直接打破平静的现象;当M≥3.0及M≥4.0地震平静打破之后,强震发生的紧迫性可能有所增强。Using the M≥3.0 earthquakes data from the China Earthquake Network since 1970,we studied the M≥3.0 and M≥4.0 seismic quiescence nesting phenomenon and strong earthquake activities along the southeastern margin of the Qinghai-XiZang Plateau.We suggest that the seismic quiescence nesting for M≥3.0 and M≥4.0 earthquakes has been typically formed prior to a strong earthquake in the region.Based on further analysis and researches,we present the conclusion as follows:(1)The southeastern margin of the Qinghai-XiZang Plateau has showed M≥6.0 earthquakes for 8 times in the history,which were preceded by a long period seismic quiescence nesting for M≥3.0 and M≥4.0 earthquakes.(2)Strong earthquakes were generally located within the region for M≥4.0 and at the margin for M≥3.0 for the seismic quiescence area.(3)Strong earthquakes can directly break the seismic quiescence nesting of M≥3.0 and M≥4.0 earthquakes.When the seismic quiescence is broken,the risk of strong earthquakes might increase.

关 键 词：青藏高原东南缘 地震平静嵌套 强震活动分析 

分 类 号：P315[天文地球—地震学]