全球超导重力仪地震频段背景噪声
Analysis of the Background Noise in the Seismic Frequency Band of the Global Superconducting Gravimeter
张凌云 1薛秀秀 1田桂娥1
作者信息
- 1. 华北理工大学矿业工程学院,河北 唐山 063210
- 折叠
摘要
详细研究了超导重力仪台站背景噪声水平的评估方法;基于该方法,选取了 2010 智利地震、2011Tohoku地震和 2015 智利地震前后多台超导重力观测数据,评估其在地震频段的背景噪声水平,得到了不同台站的地震噪声等级SNM;对不同超导重力仪记录背景噪声水平最低的 5 天进行统计分析,得出包含大震事件的多台站连续超导重力数据求取最平静期时段,大震发生前 5 天至大震发生后 10 天可不予考虑,为多台站的地震平静期时段选取提供参考.
Abstract
Detailed research was conducted on the assessment methods for the background noise levels at superconducting gravimeter stations.Based on this method,multiple superconducting gravity observation data before and after the 2010 Chile earthquake,the 2011 Tohoku earthquake and the 2015 Chile earthquake were selected to evaluate the background noise levels in the seismic frequency band,and the background noise level SNM for different stations was obtained.A statistical analysis of the 5 days with the lowest background noise levels recorded by different superconducting gravimeters was performed,and the continuous superconducting gravity data of multiple stations including major earthquake events were used to obtain the quietest period,the period from 5 days before the occurrence of large earthquake to 10 days after the occurrence of a major earthquake can be disregarded,which provides a reference for the selection of the seismic quiet period segment for multiple stations.
关键词
超导重力仪/背景噪声/地震频段/功率谱密度Key words
superconducting gravimeter/background noise/seismic frequency band/power spectral density引用本文复制引用
基金项目
国家自然基金(42004075)
唐山市基础研究项目(21130210C)
大地测量与地球动力学国家重点实验室开放基金(SKLGED-2019-2-3-E)
出版年
2024
NETL
NSTL
万方数据