Abstract:From middle July to late August 2020, quarantine measures are taken in Xinjiang due to the impact of COVID-19. We select the waveform data of 28 broadband digital seismometers from Xinjiang network from June to September 2020, obtain the corresponding PSD (noise power spectral density) and PDF (probability density function), and count the distribution of PSD values in different frequency bands according to the situation. We analyze the characteristics of noise level changes in Xinjiang during the epidemic period. The results show that due to the impact of COVID-19, the noise level in the high frequency band (2-20 Hz) in Urumqi has dropped by 4.5%, and other areas have experienced different degrees of reduction. The main influencing factor is the continuous reduction of human activities. At the same time, this noise blanking phenomenon is also transmitted from the surface to the underground.
DENG Mingwen,LI Xiaodong,ZHANG Sen et al. Analysis of the Impact of COVID-19 Prevention and Control Measures on Earth Background Noise in Xinjiang[J]. jgg, 2021, 41(9): 985-990.