• 责任者：Xue Yan (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Liu Jie
• 刊名：Acta Seismologica Sinica
• 出版年：2011
• 卷期：33(3)
• 关键词：大震 ; great earthquakes ; 地震活动性 ; seismicity ; 全球 ; global ; 智利 ; Chile
• 页码：p.292-303
• 图表：9 illus., 2 tables, 13 refs.
• 分类号：0500
• issnNo：ISSN0253-3782
• isbnNo：CN11-2021/P

///Spatio-temporal variation of seismic activity before the great Chile earthquake is studied. Some results are as follows: 1) two types of seismic gaps appeared before the Chile M_W8.8 shock; 2) this is the long-term background anomaly of the obvious quiescence of M_W≥7.0 earthquakes before the Chile earthquake; 3) the quiescence of earthquakes with M_W≥6.5 appeared in South American Plate and its vicinity during 2007~2009, and the quietude state has been disappeared three months before the M_W8.8 shock; 4) the deep and intermediate-depth earthquake activity has been noticeably strengthened in the subduction zone of South American Plate since 1993; and 5) the great Chile earthquake shows that the global seismicity is still in the active period of M_W≥8.5 earthquakes since 2004. Based on the characteristics of the former two active periods, several M_W≥8.5 great earthquakes would take place in a few years.