Spectral domain local cancellation procedure of harmonic noise in seismic data


KARSLI H., DONDURUR D.

8th Congress of the Balkan Geophysical Society, BGS 2015, Chania, Greece, 5 - 08 October 2015 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.3997/2214-4609.201414220
  • City: Chania
  • Country: Greece
  • Dokuz Eylül University Affiliated: Yes

Abstract

We describe a simple and fast filtering procedure which is locally applied in spectral domain and uses iterative trimmed and truncated mean filter method (LITTM), to cancel harmonic noise with 50 or 60Hz and its multiples caused by power line during the seismic data acquisition in land and marine. The procedure doesn't require any reference signal or an estimate accurately the fundamental frequency of the harmonic noise, but only it should be determined the approximate frequencies of the noise on the amplitude spectra. Real land and marine data examples show that the harmonic noise is filtered well without damaging the available frequencies around the fundamental frequency and provide clean outputs for later processes. We expect this procedure may be a useful tool to recover the signal masked by power line noise in other geophysical data.