DETECTION OF EARTH’S FREE OSCILLATIONS IN JAPAN 9.0 EARTHQUAKE BY USE OF BODY STRAIN OBSERVATION AT DATONG SEISMOSTATION
Guo Mingrui 1) ;Su Yanhong 2) ;Guo Yuqin 1) ; Hu Jiuchang 1) ;Liu Wei 1) ; and Han Sheng 2)
1)Earthquake Administration of Hainan Province,Haikou 570203;2)Datong Centeral Seimostation,Earthquake Administration of Shanxi Province,Datong 037008
Abstract On the basis of digital observations of the strain at Datong station and by using power spectral density estimation, without any volume strain data (Earth tide, atmospheric pressure) to correct,the free oscillation produced by Japan massive earthquake 0S4～0S37 pitch ball is obtained.Further more,through the comparison of the observed oscillation with the oscillation calculated from PREM model,both the cycles are consistent with each other.The relative error of cycle 0S10 is 0.29%,the others are less than 0.1%.
Key words ：
earthquake
the Earth’s free oscillation
power spectral density
PREM model
strain
Received: 01 January 1900
Corresponding Authors:
Guo Mingrui
Cite this article:
Guo Mingrui ,Su Yanhong ,Guo Yuqin et al. DETECTION OF EARTH’S FREE OSCILLATIONS IN JAPAN 9.0 EARTHQUAKE BY USE OF BODY STRAIN OBSERVATION AT DATONG SEISMOSTATION[J]. , 2012, 32(Supp.): 32-33.
Guo Mingrui ,Su Yanhong ,Guo Yuqin et al. DETECTION OF EARTH’S FREE OSCILLATIONS IN JAPAN 9.0 EARTHQUAKE BY USE OF BODY STRAIN OBSERVATION AT DATONG SEISMOSTATION[J]. jgg, 2012, 32(Supp.): 32-33.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2012/V32/ISupp./32
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