基于HHT的海拉尔地震监测中心站连续重力观测背景噪声分析

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关键词连续重力；HHT；背景噪声

中图分类号：P315.63 文献标识码：A 文章编号：2096-7780（2025）08-0472-05

doi：10.19987/j.dzkxjz.2024-144

Noise analysis of continuous gravity data in Hailar Earthquake Monitoring Center Station based on HHT

Zou Xinci1，Wang YiD，Tan Yuanmeng1，Jin Zhihuil，Ye Ziqing2，Wu Tong1，Du Weipengl， Zhou Jinlingl， Shen Ying1

1） Hailar Earthquake Monitoring Center Station，Inner Mongolia Hailar O2loo8， China

2） Bayanhot Earthquake Monitoring Center Station， Inner Mongolia Bayanhot 750306， China

AbstractThe continuous observation data of the PET gravimeter at the Hailar Earthquake Monitoring Centre Station from 2021 to 2023 were taken as the research object.The original continuous gravity data were preprocessed using Tsoft software to obtain the residual gravity data.Time-frequency analysis of the residual gravity data was subsequently conducted using theHHT（Hilbert-HuangTransform）method，andthe spectralcharacteristicsofthe backgroundnoiseof the data were summarized.It wasconcluded thatthe background noise of thecontinuous gravity observation at the Hailar station was mainly concentrated in the frequency band of 0.05～0.28Hz ， with the dominant frequency at 0.23Hz .This study aided in identifying the normal observation background and interference characteristics of gravity data，providing a background basis for analyzing seismic anomaly information.

Keywordscontinuous gravity; HHT; background noise

0 引言

重力仪在垂向上可视作长周期地震仪，鉴于其稳定性高、响应灵敏，故可将连续重力数据应用于地球背景噪声的研究中[1]。（剩余4897字）