Automatic Removal of Low Frequency Noise from Seismograms Using the Fingerprinting Method: Algorithms, Properties, Limitations

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Journal of Volcanology and Seismology Pub Date : 2024-06-24 DOI:10.1134/S0742046324700556
K. Yu. Silkin
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Abstract

This paper describes a new method for automatic preparation of a noisy seismic record for further analysis using expert information systems. The method is based on seismogram fingerprints, which, due to their concise but informative pattern, allow the development of a reliable algorithm for finding important noise characteristics. The search for the optimal cutoff frequency for a high-pass filter is especially important under conditions of partial overlap of the signal and noise spectra, when the latter have high intensity. It is precisely this difficult case that this study aims to address. The article analyzes the methodology developed here in application to several hundred records of regional earthquakes and explosions. The analysis showed that reliable results can be achieved in more than 90% of the cases. In addition, the defects and limitations of the method are mentioned, which are logical consequences of its advantages. The Appendix to this article contains a detailed description of the algorithm underlying the method.

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使用指纹法自动去除地震图中的低频噪声:算法、特性和局限性
摘要 本文介绍了一种自动准备噪声地震记录的新方法,以便利用专家信息系统进行进一步分析。该方法以地震图指纹为基础,由于指纹模式简洁但信息量大,因此可以开发出一种可靠的算法来发现重要的噪声特征。寻找高通滤波器的最佳截止频率,在信号频谱和噪声频谱部分重叠的情况下尤为重要,因为后者的强度很高。本研究正是要解决这一难题。文章分析了本文开发的方法在几百个地区地震和爆炸记录中的应用。分析表明,在 90% 以上的情况下都能获得可靠的结果。此外,文章还提到了该方法的缺陷和局限性,这些缺陷和局限性是其优势的必然结果。本文附录详细介绍了该方法的算法。
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来源期刊
Journal of Volcanology and Seismology
Journal of Volcanology and Seismology 地学-地球化学与地球物理
CiteScore
1.50
自引率
28.60%
发文量
27
审稿时长
>12 weeks
期刊介绍: Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.
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