【摘要】 在分析强震观测与微震观测本质区别的基础上,以已知的地震波强度资料为参照,通过对比FBS-3B型微震计及BBAS-2型强震加速度计的仪器噪声,揭示了仪器噪声、响应类型对两种仪器检测灵敏度的影响.我们对小湾台网记录到的一次微震进行了模拟计算.用正弦子波叠加合成地震记录作为地震计摆体响应方程的输入,通过计算,获得了微震计和强震加速度计的输出.对输入和输出数据进行分析,证明了两种仪器对远震长周期信号的监测能力存在显著差异,这种差异来源于强震计与微震计检测下限的不同.更多还原

【Abstract】 With some known typical seismic data as reference,we analyzed the essential differences between strong motion observation and small earthquake observation,and compared the electric noises of FBS-3B seismometer and BBAS-2 accelerator.We carried out a synthetic simulation using the data of a small earthquake recorded by Xiaowan network.The result reveals the influence of electric noise and response type of the sensors on their sensitivities to ground motion.With asynchronous synthetic sine waves as input of a pendulum response equation,the output of a seismometer and accelerator is obtained.The sensitivities of the sensors to a tele-seismic wave prove to be quite different and it is this difference that leads to the distinction of recorded data.更多还原