Abstract This paper analyzes the background noise characteristics of continuous waveform data of seismological observation and strong earthquake of five early warning reference stations at different regions in eastern Inner Mongolia in June 2022.The results show that the RMS values of seismological observation at five stations are all lower than those of the strong earthquake, the RMS values changed little within 30 days, and the background noise source is relatively stable. The noise power spectrum of each frequency point at 1 to 20 Hz frequency band of seismological observation and strong earthquake of each reference station is affected by human activities, showing a strong regularity, mainly reflected in the frequency band greater than 2 Hz. Based on the comparison of PSD probability density function distribution, the strong earthquake is unreliable when the recording noise signal is less than 10-1 Hz, and the peak frequency band around 14 Hz is affected by near-field interference.
GUO Yanjie,AN Quan,BAO Ying et al. Background Noise Characteristics of Seismological Observation and Strong Earthquake of Early Warning Reference Stations in Eastern Inner Mongolia[J]. jgg, 2023, 43(7): 761-766.
GUO Yanjie,AN Quan,BAO Ying et al. Background Noise Characteristics of Seismological Observation and Strong Earthquake of Early Warning Reference Stations in Eastern Inner Mongolia[J]. jgg, 2023, 43(7): 761-766.
