Abstract By calculating power spectrum density (PSD) and probability density function (PDF) of continuous waveform data from cave observation from Inner Mongolia seismic network from December 2019 to November 2020, we analyze background noise characteristics of the stations.The results show that background noise in the high frequency band is significantly different between day and night, the noise level during the COVID-19 pandemic is significantly lower than other times.The background noise in the secondary microseismic frequency band has a significant seasonal variation, the noise level is stronger in winter than in summer, the peak value of PSD decreases with the increase of distance from stations to the coastline. The background noise in the main microseismic frequency band has a peak in 10-20 s, the peak value is highest in winter, with no difference in spring, summer and autumn, and the difference of peak values in the same season is small at different stations.The noise level in the long period has little difference between the four seasons. Spring and summer are slightly higher than autumn and winter.
AN Quan,ZHAO Yanhong,GUO Yanjie et al. Analysis of Background Noise Characteristics of Cave Observation Stations of Inner Mongolia Seismic Network[J]. jgg, 2021, 41(12): 1312-1316.
AN Quan,ZHAO Yanhong,GUO Yanjie et al. Analysis of Background Noise Characteristics of Cave Observation Stations of Inner Mongolia Seismic Network[J]. jgg, 2021, 41(12): 1312-1316.