Abstract By calculating the acceleration PSD values and the corresponding PDF values of the continuous surface and borehole observations at Erenhot seismic station, the interference characteristics of sandstorms on the environmental noise level of the seismic station and the effect of downhole observations on suppressing sandstorms are studied. The results show that the sandstorms interfere with the ambient noise level of the seismic stations, mainly in the frequency bands of 4 Hz, 9 Hz, 10-20 Hz and below 10 s. The sand and dust mainly affect the background noise in the frequency band of 10-20 Hz, the high wind mainly affects the background noise near 4 Hz and 9 Hz, and the three-divisional background noise below 10 s has a certain correlation with the wind direction. 10 s-4 Hz band sandstorms have no effect on the environmental noise level. The borehole observation can better suppress the interference of sandstorms on the ambient noise level of the seismic stations.
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