河北区域VP型宽频带垂直摆倾斜仪同震响应分析——以2019年河北唐山M4.5地震为例  

Co-seismic Response Analysis of VP Broadband Vertical Pendulum Tiltmeter in Hebei Region——Taking the 2019 Tangshan M4.5 Earthquake in Hebei Province as an Example

作　　者：王嘉琦 杨东辉 常玉柱 郭亚亚[1] WANG Jia-qi;YANG Dong-hui;CHANG Yu-zhu;GUO Ya-ya(Chengde Central Seismic Station, Hebei Earthquake Agency, Chengde, Hebei 067000, China)

机构地区：[1]河北省地震局承德地震监测中心站,河北承德067000

出　　处：《山西地震》2022年第1期28-30,56,共4页Earthquake Research in Shanxi

摘　　要：以2019年河北唐山M4.5地震为例,对河北区域内6套VP型宽频带垂直摆倾斜仪进行同震响应分析,结果表明,VP垂直摆同震响应良好,与地震波形记录有较好的对应性;对地震时段数据进行功率谱密度分析,发现地震信息主要集中在0~0.15 Hz,各台站地震时段PSD较平静时段的结果增大,最大值随震中距增加逐渐减小,各台站VP垂直摆的频谱在时间-频率上有较好的一致性。Taking the 2019 Tangshan M4.5 earthquake in Hebei Province as an example,the co-seismic response analysis of 6 sets of VP broadband vertical pendulum tiltmeter in Hebei region is carried out.The results show that the VP vertical pendulum has a good co-seismic response and a good correspondence with seismic waveform records.By analyzing the power spectral density of seismic time period data,it is found that the seismic information mainly concentrates on 0~0.15Hz.The PSD results of each station during seismic time period are larger than those in quiet time period,and the maximum value decreases gradually with the increase of the epicentral distance.The frequency of VP vertical pendulum of each station has better consistency in time-frequency.

关 键 词：宽频带垂直摆倾斜仪 同震响应 功率谱密度 

分 类 号：P315.725[天文地球—地震学]