【摘要】 地震的同震响应包含了地震破裂及传播过程中的大部分信息,因此可用这些同震信息对地震震源的一些参数进行估计。2014年9~12月,马鲁古海发生5次M_S6.1~7.1强震,北京地震台的gPhone重力仪均有同震响应。本文从首波初至、地震频带响应、地震面波、同震变形幅度、同震持续时间等方面分析了重力仪的同震响应特征,并与STS-2宽频带地震计进行了波形对比分析。结果表明,相对于宽频带地震计,gPhone重力仪亦能提供丰富的由地震引起的地面运动信息,其首波初至、地震频带响应等与宽频带地震计有高度相似,且gPhone重力仪对长周期地震面波的响应很好,表现出其独有的特性。更多还原

【Abstract】 5 strong earthquakes with M_S6.1 ~ 7.1 occurred in the Molukka Sea,during the period of September ~ December,2014,and there were co-seismic responses of the g Phone gravimeter at the Beijing seismic station. In this paper,we study the characteristics of co-seismic response in 4aspects: head wave,response of seismic band,deformation range,and co-seismic duration. In addition,the g Phone gravimeter response is compared with that of the STS-2 broadband seismometer. The results show that compared with the broadband seismometer,the g Phone gravimeter can also provide rich information of ground motion caused by the earthquake,and has its own characteristics.更多还原