地震背景噪声功率谱密度及概率密度函数的计算及其Matlab实现
Seismic Background Noise Power Spectral Density and Probability Density Function Calculation Based on Matlab
刘庆华 1鲁来玉 2常利军 2李宗超 2侯博文 3谢佳兴3
作者信息
- 1. 中国地震局地球物理研究所,北京 100081;河南省地震局,郑州 450016
- 2. 中国地震局地球物理研究所,北京 100081
- 3. 河南省地震局,郑州 450016
- 折叠
摘要
介绍了地震背景噪声功率谱密度及概率密度函数计算方法及涉及的一些概念,以台站实际数据为例,给出了应用Matlab计算噪声功率谱密度及其概率密度函数的程序算法,该方法直接输入文本格式数据,计算台基噪声功率谱概率密度函数;以洛阳地震台 24 小时的连续波形记录为例,详细叙述了原始数据去仪器响应、计算功率谱密度、倍频程计算和噪声功率谱密度的概率密度函数计算实现的全过程.该方法编程简单,适用于单台噪声水平评估,在野外台站的快速勘选中具有潜在应用价值.
Abstract
This paper introduces the calculation methods and concepts related to the power spectral density and probability density function of seismic background noise.Taking actual data from the station as an example,a program algorithm for calculating the power spectral density and probability density function of noise using Matlab is provided.This method directly inputs text format data to calculate the probability density function of the power spectral density of background noise in a station.Taking the 24-hour continuous waveform record at Luoyang Seismic Station as an example,the entire process of implementing the removing instrument response,power spectral density calculation,octave calculation,and probability density function calculation of noise power spectral density from raw data is described in detail.This method is simple to program and suitable for evaluating the noise level of a single station.It has potential application value in the rapid selection of field stations.
关键词
地震背景噪声/噪声功率谱/噪声概率密度函数/倍频程/仪器响应Key words
seismic background noise/noise power spectrum/noise probability density function/octave/instrument response引用本文复制引用
基金项目
国家自然科学基金地震联合基金(U1839209)
中国地震局地球物理研究所基本科研业务项目(DQJB19B30)
河南省科技攻关(242102320039)
河南省地震局第四批科技创新团队()
出版年
2024
NETL
NSTL
万方数据