ANALYSIS OF TIDAL DATA BEFORE WENCHUAN Ms8.0 EARTHQUAKE
Chen Zhiyao 1,2) ;Lu Pinji 1,2) ;Li Zhengyuan 3) ;Zhao Bin 1,2) ; and Lin Suiping 1)
1)Institute of Seismology,CEA,Wuhan 4300712)Cnust Movement Lasortory, Wuhan 4300713)China Earthquake Network Center,Beijing 100045
Abstract The data for 5 years observed at 9 fixed crustal deformation stations were used to calculate the tidal factor and phase delay series before the Wenchuan Ms8.0 earthquake.It is shown that at 7 stations there were abnomal changes before the earthquake. The nearer the station located to epicenteris, the greater of the abnormal signal.However the abnormal signal from the two stations were not obvious before the earthquak, one was Maoxian which is 100 km away from the earthquake and another was Kangding which is 200 km away from the earthquake. This fully demonstrates the complexity of earthquake precursors.
Key words ：
tide analysis
tidal factor
phase lag
cruntal deformation
anomaly
Received: 01 January 1900
Corresponding Authors:
Chen Zhiyao
Cite this article:
Chen Zhiyao,Lu Pinji,Li Zhengyuan et al. ANALYSIS OF TIDAL DATA BEFORE WENCHUAN Ms8.0 EARTHQUAKE[J]. , 2009, 29(4): 48-50.
Chen Zhiyao,Lu Pinji,Li Zhengyuan et al. ANALYSIS OF TIDAL DATA BEFORE WENCHUAN Ms8.0 EARTHQUAKE[J]. jgg, 2009, 29(4): 48-50.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2009/V29/I4/48
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