Influence of COVID-19 Prevention and Control Measures on Background Noise of Seismic Stations of Hebei Network

This paper selects the continuous waveform data of Tangu station, Zhangjiakou station and Fengning station of Hebei station network from January 20 to February 10, 2020, calculates the background noise power spectral density value, and analyzes the change of background noise value with time in the high frequency band of 1 ~ 20 Hz. The results showed that during the epidemic period, the power spectrum value of 2 ~ 16 Hz high frequency band decreased, and the local daily amplitude variation reached 10 dB, with an average value of 2 ~ 5 dB. The close relationship between background noise and human activities can provide a reference for monitoring the level of urban public management.