Seismic signal enhancement through statistical (Wiener) approach

Abstract

This paper addresses the problem of improved earthquake parameter estimation of seismic signal in the presence of seismic noise recorded by Digital Seismic Recorder. A novel algorithm is investigated in two stages. First, the noisy earthquake signal power spectrum is estimated and the second step is to eliminate the estimated noise from the observed signal by spectral subtraction or Wiener filtering. This algorithm preserves the earthquake signal information and gives accurate earthquake parameters after enhancement process.