Technical Essentials of the Earth’s Free Oscillation Mode Computation
(주)코리아스칼라
- 최초 등록일
- 2023.04.05
- 최종 저작일
- 2017.10
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서지정보
ㆍ발행기관 : 한국지구과학회
ㆍ수록지정보 : 한국지구과학회지 / 38권 / 6호
ㆍ저자명 : Tae-Woong Chung, Jin-Soo Shin, Sung-Ho Na
목차
Abstract
Introduction
Equation of Motion
Integration of ConvertedEquation of Motion
Computational Result
Observation of 2011 TohokuEarthquake at Daejeon, Korea
Discussion and Conclusion
References
영어 초록
Theory of Earth’s free oscillation is revisited. Firstly, we summarized the underlying formulations, such as the equation of motion and its conversion into numerically integrable form and then explained computational procedures including the treatment of inner core-outer core boundary and core-mantle boundary, while the latter information has not been explicitly given in most publications. Secondly, we re-calculated the periods of Earth’s free oscillation modes (period >200 s) for PREM model. In doing so we acquired the values of modes missing in Dziewonski and Anderson (1981). As a case observation, one seismogram after 2011 Tohoku earthquake recorded at Daejeon, Korea (KIGAM seismic station) was briefly analyzed to identify free oscillation mode excitations on its spectra. The material in this article will be most clear guide for those on calculating the Earth’s free oscillation mode.
참고 자료
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