Earthquake detecting has been an important way to detect underground geologic structure.And earthquake signal is the main information source for earthquake detecting. It is quite a critical step to remove noise from earthquake signal in order to accrue information from earthquake wave.Both earthquake signal and random noise are non-Gaussian and relative independent.This paper mainly uses the ICA method to remove random noise from earthquake signals.Fixed-point algorithm based on negentropy has been studied and applied in earthquake signal de-noising.After serious studying the earthquake features,three main sub-wave modes were built.By simulating the earthquake signal and implementing the simulation in MATLAB,the affectivity was validated.
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