地球与行星物理论评（中英文）2025，Vol.56Issue(5)：573-582,10.DOI:10.19975/j.dqyxx.2024-056
远震P波衰减因子t*的时间域匹配测量流程及特征分析
Time domain matching measurement process and characteristic analysis of tele-seismic P-wave attenuation factor t
摘要
Abstract
When using the time domain matching method to measure the attenuation factor,most of the exi-sting studies rely on the method of artificial vision to screen the benchmark waveform.This process lacks quantita-tive criteria,is susceptible to subjective bias,and has certain limitations.Based on the fact that teleseismic wave-forms recorded by multiple stations in the same network share nearly identical propagation paths,we propose a multi-level screening approach to progressively extract benchmark waveform with more detailed features from waveform records.By combining time-domain matching method with the multi-level screening approach,this pa-per further explores and refines the measurement process of the attenuation factor of the teleseismic waveform.Numerical experiments show that when is an excessively large positive value,the attenuated waveform becomes overly smoothed,with nearly all detailed features disappearing.Conversely,when is an excessively small nega-tive value,high-frequency noise obscures the dominant characteristics of the waveform,making it difficult to identify its intrinsic properties.Using observational data,this study validates the rationality and effectiveness of the multi-level screening approach by comparing it with previous results and testing different combinations of bench-mark waveforms.关键词
地震波衰减/时间域匹配法/衰减因子t∗/远震P波衰减Key words
seismic wave attenuation/time-domain matching method/the attenuation factort*/teleseismic P-wave attenuation分类
天文与地球科学引用本文复制引用
陈泆平,张风雪..远震P波衰减因子t*的时间域匹配测量流程及特征分析[J].地球与行星物理论评（中英文）,2025,56(5):573-582,10.基金项目
国家自然科学基金资助项目(U23A2029)Supported by the National Natural Science Foundation of China(Grant No.U23A2029) （U23A2029）
