汶川M_S8.0地震北川附近同震和震后垂直位移特征  

Co-and post-seismic vertical displacements of Wenchuan M_S8.0 earthquake near Beichuan

作　　者：董运洪[1] 罗三明[1] 韩月萍[1] 陈长云[1] 

机构地区：[1]中国地震局第一监测中心,中国天津300180

出　　处：《地震学报》2012年第5期611-620,727,共10页Acta Seismologica Sinica

基　　金：中国地震局地震科技星火计划(XH12069);地震行业科研专项重大项目(200908029)资助

摘　　要：利用北川附近震前水准数据,以及2008年和2010年两条一等水准数据,得到了北川附近同震和震后垂直位移量,获得如下结果:北川附近的北川—映秀断裂的同震垂直位移量为4.711m,断层上下盘最大位错量为5.1m,然而,位于平武县境内的青川断裂同震位错仅有0.064m.2008—2010年,汶川MS8.0地震后北川附近的北川—映秀断裂震后垂直位移速率为5—27mm/a,江油县大康镇附近的江油—广元断裂震后垂直位移速率为20.6mm/a,而古城区附近的青川断裂垂直位移速率仅为0.2—1.3mm/a.Co- and post-seismic vertical displacements of the Wenchuan Ms8. 0 earthquake, derived from pre-seismic leveling data and two measurements in 2008 and 2010 along two first-order leveling lines near Beichuan, show the following features： Co-seismic displacement along Beichuan-Yingxiu fault was as large as 4. 711 m near Beichuan, where the maximum observed fault offset was 5. 1 m. In contrast, the observed co-seismic offset of the Qingchuan fault in Pingwu County was only 0.064 m. From 2008 to 2010, the post-seismic displacement rate was 5--27 mm/a near Beichuan-Yingxiu fault in Beichuan area, 20.6 mm/a at Jiangyou-Guangyuan fault near Dakang, and only 0. 2-1.3 mm/a at Qingchuan fault near Gucheng

关 键 词：汶川MS8.0地震 同震垂直位移 震后垂直位移 水准测量 北川 

分 类 号：P315[天文地球—地震学]