[1]REN Jia,CHEN Hua-jing,JIANG Cui-rong,et al.Earth's Free Spheroidal Oscillations of the Great Sumatra Earthquake Observed with Digital Water Level Meter[J].Journal of Seismological Research,2009,32(04):333-338.
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Earth's Free Spheroidal Oscillations of the Great Sumatra Earthquake Observed with Digital Water Level Meter
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
32
Number of periods:
2009 04
Page number:
333-338
Column:
Public date:
2009-04-23
- Title:
- Earth's Free Spheroidal Oscillations of the Great Sumatra Earthquake Observed with Digital Water Level Meter
- Keywords:
- Digital water level meter; The great Sumatra earthquake; Earth's free oscillations; Spherical oscillations
- CLC:
- P315.61
- DOI:
- -
- Abstract:
- Firstly,by means of LN-3 digital water level meter data and power spectral density estimation method,in the absence of information to deal with the tidal case,we gained the 0S3～0S30 free-oscillation frequency of Sumatra earthquake on 26 December 2004,and also detected 2S1,1S2,1S3,2S5,2S6 5 months spherical harmonic oscillation.Recorded a number of significant modes of the line splitting,the first time the water level data extracted 0S3,0S4,2S1 three modes of splitting of the line cycle,although the three modes are only two single-peak,but the Earth's free oscillation spectrum of split testing to study the phenomenon of the deep internal structure of the Earth provides a new method.Studies have shown that the water level instrument digital data can be extracted is true to the Sumatra earthquake excited oscillation of the Earth's sphere,which for the Study of Earth's free oscillations and provides a new method of observing instruments.The use of digital water level data of the Earth's free oscillations research issue has a bright future.
- References:
- -
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Last Update:
2009-04-23