signaux sismiques

Earthquakes are unpredictable disasters in nature. During seismic energy is suddenly released into the earth's lithosphere and creates seismic waves, these waves are elastic waves that can pass through a medium by modifying it according to the intensity of the earthquake. Therefore, seismic signals are very contaminated by noise, which is a set of permanent ground vibrations, due to a multitude of causes (Signal-to-noise ratio of the seismic signal is very low.). So noise is a component of seismograms (signals recorded by seismometers), generally undesirable and difficult to interpret. Since the frequency characteristics of local noise are superimposed on the seismic signal, the use of analog or digital frequency filtering is one of the effective means of eliminating unwanted signals. Preprocessing techniques are used in order to reduce noise. In this work the LMS filter is implemented to filter the noise of the seismic signal, as well as the identification of the filter coefficients.