[1]HU Shufang,LI Jun,DAI Zonghui,et al.Crustal Media Seismic Velocity Changes in Jinzhong Reservoir Area in Fujian by Using Ambient Noise[J].Journal of Seismological Research,2021,44(01):49-55.
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Crustal Media Seismic Velocity Changes in Jinzhong Reservoir Area in Fujian by Using Ambient Noise
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 01
Page number:
49-55
Column:
Public date:
2021-01-15
- Title:
- Crustal Media Seismic Velocity Changes in Jinzhong Reservoir Area in Fujian by Using Ambient Noise
- CLC:
- P313.22
- DOI:
- -
- Abstract:
- Based on continuous seismic data of the stations in Fujian Seismic Network in the surrounding area of the Jinzhong Reservoir during Oct.,2011 and Dec.,2015,we extracted the empirical Green's function between station pairs by using seismic ambient noise correlation methods,and measured the travel-time shifts between the empirical Green's function and the reference Green's function periodically(1～2 s,2～4 s and 4～8 s),and then calculated the relative seismic velocity changes between the stations in the reservoir area.The results show that the relative seismic velocity changes for underground medium in the 2～4 s period show the annual variation rule of increases in summer and decreases in winter,which obviously correlated with the change of water level and precipitation in the reservoir area.It shows that the change of water level and precipitation have the greatest influence on the change of seismic velocity in this period.From Aug.,2013 to Oct.,2013,four ML≥4.0 earthquakes occurred successively in Xianyou area,among which,after the ML5.0 earthquake on Sep.4,2013,the wave velocity decreased by about 0.1%,and then the wave velocity recovered gradually.At the later stage of the whole earthquake swarm activity,the influence on the seismic velocity of the reservoir medium was not obvious.
- References:
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Last Update:
2021-01-15