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MS6.1～7.1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。

5 strong earthquakes with MS6.1～7.1 occurred in the Molukka Sea，during the period of September～December,2014，and there were co-seismic responses of the gPhone gravimeter at the Beijing seismic station. In this paper，we study the characteristics of co-seismic response in 4 aspects：head wave，response of seismic band，deformation range，and co-seismic duration. In addition，the gPhone gravimeter response is compared with that of the STS-2 broadband seismometer. The results show that compared with the broadband seismometer，the gPhone gravimeter can also provide rich information of ground motion caused by the earthquake，and has its own characteristics.

中国地震局地球物理研究所中央级公益性科研院所基本科研业务专项(DQJB14B08)资助