置于同一仪器墩的2套VP型摆式倾斜仪观测数据对比分析  

Comparative analysis of the observation data of two sets of vertical pendulum tiltmeter on the same instrument pier

作　　者：方燕勋 FANG Yanxun(Hangzhou Earthquake Monitoring Center Station,Zhejiang Province 310013,China)

机构地区：[1]杭州地震监测中心站,浙江310013

出　　处：《地震地磁观测与研究》2022年第6期94-100,共7页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局监测、预报、科研三结合课题(项目编号:3JH-2021021)。

摘　　要：湖州地震台2套VP型摆式倾斜仪被置于同一仪器墩进行比对观测,通过对2套形变观测数据进行对比分析,发现二者记录的潮汐观测曲线较一致,潮汐参数相位滞后较一致,且短期变化趋势相关性较高。对同震响应衰减规律进行统计,结果表明,随着震中距增大,最大振幅值呈指数上升,且拟合的收敛度较高。但2套仪器NS向分量潮汐因子、同震响应最大振幅存在偏差,可能与仪器自身、仪器放置位置和NS向潮汐幅度小有关。Two sets of vertical pendulum tiltmeters are placed onthe same instrument pierfor comparative observation at Huzhou Seismic Station.Through comparative analysis of the two sets of deformation observation data,it is found that the tidal observation curves recorded by the two sets are relatively consistent,the phase lag of tidal parameters is relatively consistent,and the correlation of short-term change trend is relatively high.The statistics of the attenuation law of coseismic response show that the maximum amplitude increases exponentially with the increase of epicentral distance,and the convergence of fitting is relatively high.However,the tidal factor in the NS direction and the maximum amplitude of coseismic response of the two sets of instruments have deviations,which may be related to the instrument itself,the position of the instrument and the small tidal amplitude in the NS direction.

关 键 词：湖州地震台 VP型摆式倾斜仪 潮汐参数 同震响应 

分 类 号：P315.63[天文地球—地震学]