大地测量与地球动力学2017，Vol.37Issue(12)：1302-1307,6.DOI:10.14075/j.jgg.2017.12.020
闽粤地区同震形变波记录序列分析及小波能谱特征
Sequence Analyses and Wavelet Spectrum Characters of Co-Seismic Deformation Wave Record in Fujian-Guangdong Area
摘要
Abstract
This paper uses sequence analysis and wavelet spectrum methods to discuss co-seismic deformation waves (CSDW) records characters and its conduct mechanism in Fujian-Guangdong area.The deformation data,based on 10 stations,includes 40 precursory anomalies in total.The result show that:(1) Arrival-time of CSDW is related to epicentral distance,the records include d-P and d-S waves,the records from different items are not consistent,and the same measured items are similar to the recorded waveform.(2) To a certain extent,the amplitude ratio shows the direction of the source,and further reflects the direction anisotropy of the amplitude ratio.(3) By calculating the cross (self)-correlation and filter processing,we can identify the CSDW bands in 0.02～0.04 Hz;the peak value is about 0.025Hz.(4) The wavelet spectrum band of Chile earthquake CSDW is mainly 64～254 s,the main energy is concentrated in 128～254 s,which is different thanthe Nepal earthquake CSDW.Different measuring points are different,the band of Chaozhou and Xiamen station is 16～32 s and 16～64 s,respectively.Results suggest the CSDW records include P wave and S wave elements except surface waves;in addition,the conduction mechanism of CSDW,which is caused by different focal mechanisms,may be anisotropic.This study has reference significance for the study of earthquake induced strain.关键词
同震形变/闽粤地区/小波能谱/智利地震/尼泊尔地震Key words
co-seismic deformations waves/Fujian-Guangdong area/wavelet spectrum/Chile earthquake/Nepal earthquake分类
天文与地球科学引用本文复制引用
章鑫,叶青..闽粤地区同震形变波记录序列分析及小波能谱特征[J].大地测量与地球动力学,2017,37(12):1302-1307,6.基金项目
国家自然科学基金(41374080).National Natural Science Foundation of China,No.41374080. （41374080）
