Articles | Volume 18, issue 3
Nonlin. Processes Geophys., 18, 367–379, 2011
https://doi.org/10.5194/npg-18-367-2011
Nonlin. Processes Geophys., 18, 367–379, 2011
https://doi.org/10.5194/npg-18-367-2011

Research article 21 Jun 2011

Research article | 21 Jun 2011

A nonlinear method of removing harmonic noise in geophysical data

Y. Jeng and C.-S. Chen Y. Jeng and C.-S. Chen
  • Department of Earth Sciences, National Taiwan Normal University, 88, Sec. 4, Ting-Chou Road, Taipei, 116, Taiwan

Abstract. A nonlinear, adaptive method to remove the harmonic noise that commonly resides in geophysical data is proposed in this study. This filtering method is based on the ensemble empirical mode decomposition algorithm in conjunction with the logarithmic transform. We present a synthetic model study to investigate the capability of signal reconstruction from the decomposed data, and compare the results with those derived from other 2-D adaptive filters. Applications to the real seismic data acquired by using an ocean bottom seismograph and to a shot gather of the ground penetrating radar demonstrate the robustness of this method. Our work proposes a concept that instead of Fourier-based approaches, the harmonic noise removal in geophysical data can be achieved effectively by using an alternative nonlinear adaptive data analysis method, which has been applied extensively in other scientific studies.

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