【摘要】 在武汉大地测量国家野外科学观测站LacosteET重力仪资料中发现汶川大地震"震前扰动"现象之后,又在全国数十个台站宽带地震仪资料中发现了汶川大地震的"震前扰动".和LacosteET重力仪观测到的"震前扰动"一样,宽带地震仪资料的"震前扰动"也是在震前两天开始并逐渐增大,一直持续到汶川大地震发生,信号周期也是4~8 s.更多还原

【Abstract】 After significant gravity disturbance before the 12 May 2008 Wenchuan earthquake(Ms=8.0) was observedat the Wuhan national field scientific observational station for geodesy by using LacosteET gravimeter,we discover the similar disturbances from broadband seismometers dataof several tens station across the coantry.Like the LacosteET gravimeter,the broadband seismometer shows that the disturbance has been gradually increasing two days before the earthquake with its period of 4~8 s.更多还原