Study on Noise Characteristics of Time Series of Geomagnetic Observation in Jilin
Study on Noise Characteristics of Time Series of Geomagnetic Observation in Jilin
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发表时间：
2013
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通讯作者：
Wu Cheng-zhi
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作者：
Wu Cheng-zhi
在地震预测研究中，地磁观测被认为是可靠的观测手段之一。现代地球物理研究表明，地磁观测数据的时间序列中含有多种噪声，可以通过选择或构造最佳的统计噪声模型来描述观测噪声，从而了解噪声的特性，得到噪声功率谱及其分量。本文对1998年以来的7个地磁时间序列的噪声特性进行了分析，并对噪声功率谱进行了比较。结果表明，地磁观测数据的噪声特征与地磁观测数据的噪声特征基本一致，而地磁观测数据的噪声特征与地磁观测数据的噪声特征基本一致本文利用极大似然估计方法对吉林省两个地磁台的地磁观测时间序列进行了分析，对噪声模型参数进行了估计，结果表明，地磁观测时间序列中所含的噪声可以用经典功率噪声来描述，其谱指数范围为-1 ~-2。
In the earthquake prediction studies,geomagnetic observation is considered to be one of reliable observation means.Modern geophysical study shows that the time series of observational data contain a variety of noise.Measured noise can be described by choosing or constructing the best statistical noise model to get to understand the noise characteristics and to get noise power spectrum and its component.Noise characteristics of seven time series of geomagnetism from two stations in Jilin Province are analyzed,by using the maximum likelihood estimation in this paper.Estimated the noise model parameters show that the noises contained in the geomagnetic observation time series can be described by classical power noise,with spectral index ranged from-1 to-2.