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Research on the Seismic Wave Characteristics of Low Frequency Signals before the Alxa Left Banner MS5.8 Earthquake in Inner Mongolia, China
Liang Shasha,Gao Lixin,Dai Yong,Ge Gen,Wang Lei
Author NameAffiliationE-mail
Liang Shasha Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China  
Gao Lixin Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China glx_nm.email@163.com 
Dai Yong Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China  
Ge Gen Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China  
Wang Lei Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China  
摘要:
In order to search for the seismic wave characteristics of low frequency signals in the Alxa Left Banner region, Inner Mongolia, the low frequency signals of seismic wave data are extracted from the earthquakes of MS5.8 in 2015 and MS5.0 in 2016 in this area. The results show that:① Before the MS5.8 earthquake, the seismic stations located near the epicenter in Wuhai, Dongshengmiao, and Shizuishan recorded seismic waves that showed the phenomenon of spectrum shift from high to low frequency. ② The low frequency signals recorded by different stations have obvious difference. ③ According to the data recorded by the station closest to the epicenter, low-frequency signals were recorded about 120 hours before the earthquake and had obvious anomalies. This may reflect slow slip before the earthquake.
关键词:  Low frequency signal  The Fourier transform  Spectrum shift  The maximum envelope amplitude
DOI:
分类号:
基金项目:This Paper Sponsored by the Major Scientific and Technical Project of Department of Science and Technology, Inner Mongolia in 2016 (Strong Earthquake Track in the Short Stage and Integration Innovation of Stereoscopic Observation Technology in Space and Ground).
Research on the Seismic Wave Characteristics of Low Frequency Signals before the Alxa Left Banner MS5.8 Earthquake in Inner Mongolia, China
Liang Shasha,Gao Lixin,Dai Yong,Ge Gen,Wang Lei
Abstract:
In order to search for the seismic wave characteristics of low frequency signals in the Alxa Left Banner region, Inner Mongolia, the low frequency signals of seismic wave data are extracted from the earthquakes of MS5.8 in 2015 and MS5.0 in 2016 in this area. The results show that:① Before the MS5.8 earthquake, the seismic stations located near the epicenter in Wuhai, Dongshengmiao, and Shizuishan recorded seismic waves that showed the phenomenon of spectrum shift from high to low frequency. ② The low frequency signals recorded by different stations have obvious difference. ③ According to the data recorded by the station closest to the epicenter, low-frequency signals were recorded about 120 hours before the earthquake and had obvious anomalies. This may reflect slow slip before the earthquake.
Key words:  Low frequency signal  The Fourier transform  Spectrum shift  The maximum envelope amplitude