Seismic Noise Reduction Using Micro-Site Array Stacking
미소-위치 배열 중합을 이용한 지진파의 잡음제거

Hun Choi, Sang-Wook Sohn, Hyeon-Deok Bae
2014 The Transactions of The Korean Institute of Electrical Engineers  
This paper presents a new approach to improve the signal to noise ratio (SNR) for local seismic disaster preventing system in densely populated area. The seismic data measured in the local site includes various sensing noises (offset or measurement noise) and man-made/natural noises (road and rail traffic noise, rotating or hammering machinery noise, human activity noise such as walking and running, wind/atmospheric pressure-generated noise, etc.). These additive noises are different in time
more » ... ifferent in time and frequency characters. The proposed method uses 3-stages processing to reduce these different additive noises. In the first stage, misalignment offset noise are diminished by time average processing, and then the second and third stages, coherent/incoherent noises such as man-made/natural noises are suppressed by array stacking. In addition, we derived the theoretical equation of the SNR gain improved by the proposed method. To evaluate the performance of the proposed method, computer simulations were performed with real seismic data and test equipment generated data as the input.
doi:10.5370/kiee.2014.63.3.395 fatcat:nn7jzssyhnfhto4oso2hftt6ni