地震地磁观测与研究2025，Vol.46Issue(2)：131-138,8.DOI:10.3969/j.issn.1003-3246.2025.02.015
基于小波分析方法的格尔木水温震前异常提取
Anomaly extraction of Golmud water temperature before earthquakes based on wavelet analysis method
摘要
Abstract
Taking the daily average data of water temperature at-40 m and-90 m of Golmud Seismic Monitoring Central Station from 2015 to 2023 as the research object,and using the characteristic of high resolution in time and frequency domain of wavelet analysis method,the db5 wavelet basis is selected to extract water temperature anomaly.The results show that the anomaly of water temperature data on the second-order wavelet detail is obvious.Through wavelet analysis,the abnormal water temperature information in Golmud before earthquakes can be extracted more intuitively and easily.The abnormal water temperature at-40 m mostly occurs from imminent earthquakes to four months before earthquakes,and the abnormal water temperature at-90 m mostly occurs from three to eight months before earthquakes.The abnormal information before strong and major earthquakes occurs even earlier.Before some earthquakes in southern Qinghai,abnormal changes also occurred in the original water temperature data.Combining the anomalies of two sets of water temperatures at different depths and comparing them with the original curves has certain indicative significance for earthquakes above magnitude 5 within 400 kilometers around Golmud and their location.关键词
水温异常/小波分析/格尔木水温Key words
anomalous water temperature/wavelet analysis/water temperature of Golmud引用本文复制引用
周瀚琳,夏宇,赵玉红,李国英,张瑾昕..基于小波分析方法的格尔木水温震前异常提取[J].地震地磁观测与研究,2025,46(2):131-138,8.基金项目
青海省地震局地震科技基金(项目编号:2024-12) （项目编号:2024-12）
