[1]CAI Huiteng,CHEN Yong,JIN Xing,et al.Study on Ambient Noise Characteristics in the Fujian Region[J].Journal of Seismological Research,2019,42(01):64-71.
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Study on Ambient Noise Characteristics in the Fujian Region
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
42
Number of periods:
2019 01
Page number:
64-71
Column:
Public date:
2019-04-20
- Title:
- Study on Ambient Noise Characteristics in the Fujian Region
- Keywords:
- Fujian region; ambient noise; power spectral density; probability density function; temporal-spatial characteristics
- CLC:
- P315.94
- DOI:
- -
- Abstract:
- In order to enhance the understandings of characteristics of seismic noise and improve observation qualities of fixed or mobile seismic stations in Fujian region,we use continuous waveforms of broadband seismograph in Fujian region in 2014 to calculate the power spectral probability density function(PDF),and discuss the influencing factors and space-time features of PDF in different frequencies. The results show that,the areas with the highest human activity related noise are located in Fuzhou-Xiamen area along the coast of Fujian province. The power spectral density at 07:00—18:00 is obviously higher than other times,and an intermittent trough shows at around 12:00 and decreases to different extent during night time. Except a sharp drop during the Spring Festival holidays,the diurnal variation was quite stable. The main component of the secondary microtremors in Fujian region is Rayleigh wave with a dominant frequency of about 2.7 s,while the dominant frequency of the primary microtremors is about 16 s. The highest level of the secondary microtremors mean level is also located in the coastal area,and tends to decay inland. There is an obvious diurnal variation for the secondary microtremors and it is highly correlated with typhoon and tidal height.
- References:
- -
- Similar References:
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Last Update:
2019-04-25