长乐-诏安断裂带上台站洞体应变观测质量及同震响应对比分析

泉州、莆田及厦门台同处于长乐-诏安断裂带上,选取3个台站2017—2021年洞体应变观测数据,分析资料的连续率、完整性及其内在质量。结果表明,泉州台洞体应变观测质量最好,其各项指标均可满足我国Ⅰ类台精度要求。各台洞体应变记录到的远震大震同震波形为震荡形,震级越大,振幅越大,持时越长,而近震大震同震波形则以脉冲型为主。

Quanzhou,Putian and Xiamen seismic stations are all located in the Changle-Zhaoan fault zone.The cave strain observation data of three stations from 2017 to 2021 are selected to analyze the continuity,integrity and internal quality of the data.The results show that Quanzhou seismic station cave strain observation quality is the best,and all its indexes can meet the accuracy requirements of Class I stations in China.The coseismic waveforms of distant large earthquakes recorded by the body strain of each station are concussive,and the larger the magnitude is,the greater the amplitude is,and the longer the duration is,while the coseismic waveforms of near earthquakes are mainly pulse type.