PDF Download HTML

[1]SHAO Yuanyuan,ZHENG Yong,WANG Liang,et al.Lg-Wave Attenuation and Site Response in the Liaoning Region[J].Journal of Seismological Research,2020,43(01):19-27.

Copy

Lg-Wave Attenuation and Site Response in the Liaoning Region

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 43 Number of periods: 2020 01 Page number: 19-27 Column: Public date: 2020-01-30

Title:: Lg-Wave Attenuation and Site Response in the Liaoning Region

Author(s):: SHAO Yuanyuan¹; ZHENG Yong²; 3; WANG Liang¹; YANG Shichao¹; JIA Lihua¹; ZHAI Lina¹; (1.Liaoning Earthquake Agency,Shenyang 110034,Liaoning,China)(2.Institute of Geophysics & Geomatics,China University of Geosciences,Wuhan 430074,Hubei,China)(3.Hubei Key Laboratory of Subsurface Multi-Scale Imaging,China University of Geosciences,Wuhan 430074,Hubei,China)

Keywords:: Lg wave; parameters of attenuation; site response; join inversion; Liaoning region

CLC:: P315.72

DOI:: -

Abstract:: The accurate attenuation characteristics and station response in Liaoning area are of great significance for quantitatively determining the observation environment of the seismic network and analyzing its tectonic mechanism.Digital seismic waveform data in Liaoning Digital Seismic Network between 2008 and 2017 are used to investigate site responses by a joint inversion method based on Lg-wave spectral ratio.We obtained the attenuation properties of the three components(UD,NS,EW)at the frequency of 1～7 Hz:The Liaoning region displays low Q₀ and weak frequency dependence,and is consistent with the geology of the active tectonic region.Amplitudes of site response are relatively flat within the dominant frequency band in the 32 stations of the Liaoning seismic network,while vary significantly in the high and low frequency bands.A few stations show obvious amplification effect at low frequency or high frequency band.For most stations,the site response amplitudes are within range of 1～8,with the maximum amplitude of ～16.Obvious differences can be found in different site types:at the lower frequency of 1～2 Hz,the amplitudes of underground stations are obviously higher than that on the ground stations,while the amplitudes of site response at the stations on the ground are obviously higher than those stations in caves on horizontal and vertical components.The site response curve shows obviously elevated in the radial direction than the vertical direction in the same site type,possibly be related to the lithological characteristics of the platform bedrock.However,the lithological difference has no obvious influence on site response for the sites with the same site type.

References:: -

Similar References:

Memo

Last Update: 2020-01-30