鹤岗地震台垂直摆倾斜仪记录同震响应

The co-seismic response of vertical pendulum tiltmeter at Hegang Seismic Station

对2011—2015年鹤岗地震台垂直摆倾斜仪记录的同震响应数据进行整理,垂直摆同震响应与震中距成线性关系;近距离地震(约Δ>10°)同震响应以阶跃为主,阶跃大小、方向与地震实际倾斜量存在差异;远震同震响应的振幅与震级呈指数函数关系,振幅与震中距成幂函数关系。分析认为,同震响应(阶跃)不仅与震中距、震级因素有关,还与场地效应和传播路径关系密切。

Through the processing of co-seismic response data recorded by the vertical pendulum tiltmeter of Hegang seismic station from 2011 to 2015, it isfound that there is a linear relationship between the co-seismic response ability and the epicentral distance.For nearearthquakes（about Δ 10 °） the coseismic response is given priority with step, and the direction and size of the step is different from the actual tilt of the earthquake.For teleseism, an exponential function relationship between amplitude and magnitude,and a power function relationship between the amplitude and the epicentraldistance are found.The conclusion is that the same seismic response（step） is not only related to the epicenter distance, magnitude and other factors, but also closely to the site effect and the propagating path.