【摘要】 从面波延迟时间、最大变形幅度、同震持续时间3个方面研究厦门地震台数字化观测仪器对2009年台湾花莲海域2次强震的同震响应特征,结果表明:对同一地点的地震,同震响应面波的延迟时间相同,持续时间与观测仪的分辨率有关;同震响应幅度与地震的震级正相关,与地震发生的方位有关:同震响应的形态以高频脉冲为主,有时伴有阶跃。为今后解释形变短临前兆现象、提取短临前兆信息及依据短临前兆信号对潜在地震的定位等提供基础。更多还原

【Abstract】 In this paper,three aspects of coseismic response to two strong earthquakes in Taiwan’s Hualien area in 2009 are studied: delay time of surface wave, maximum deformation amplitude and lasting time of coseismic response.The result shows that the time delay of surface wave is the same to earthquakes at the same place;the lasting time of the coseismic response is relate to the resolution ratio of the observation instrument;the amplitude of the coseismic response is positive correlated with the magnitude of the earthquake.The coseismic responses are mostly high-frequency impulse and sometimes accompanied with phase step.The result may helps us get a better understanding of the performance of digital observation instruments,provides us a way to study short-impending anomaly prior to earthquakes.更多还原