Geophysics and Geophysical Exploration (지구물리와물리탐사)

Korean Society of Earth and Exploration Geophysicists (한국지구물리·물리탐사학회)
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Characteristics of the Point-source Spectral Model for Odaesan Earthquake (M=4.8, '07. 1. 20)

오대산지진(M=4.8, '07. 1. 20)의 점지진원 스펙트럼 모델 특성

  • Yun, Kwan-Hee (Environmental & Structural Lab., Korea Electric Power Research Institute) ;
  • Park, Dong-Hee (Environmental & Structural Lab., Korea Electric Power Research Institute)
  • 연관희 (한전전력연구원 환경구조연구소) ;
  • 박동희 (한전전력연구원 환경구조연구소)
  • Published : 2007.11.30

Abstract

The observed spectra from Odaesan earthquake were fitted to a point-source spectral model to evaluate the source spectrum and spatial features of the modelling error. The source spectrum was calculated by removing from the observed spectra the path and site dependent responses (Yun, 2007) that were previously revealed through an inversion process applied to a large accumulated spectral dataset. The stress drop parameter of one-corner Brune's ${\omega}^2$ source model fitted to the estimated source spectrum was well predicted by the scaling relation between magnitude and stress drop developed by Yun et al. (2006). In particular, the estimated spectrum was quite comparable to the two-corner source model that was empirically developed for recent moderate earthquakes occurring around the Korean Peninsula, which indicates that Odaesan earthquake is one of typical moderate earthquakes representative of Korean Peninsula. Other features of the observed spectra from Odaesan earthquake were also evaluated based on the commonly treated random error between the observed data and the estimated point-source spectral model. Radiation pattern of the error according to azimuth angle was found to be similar to the theoretical estimate. It was also observed that the spatial distribution of the errors was correlated with the geological map and the $Q_0$ map which are indicatives of seismic boundaries.

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References

  1. 경재복, 허서윤, 도지영, 조덕래, 2007, 2007년 1월 20일 오대산 지진(M=4.8)의 진도, 단층면해 및 단층과의 관계 분석, 한국지구과학회지, 28, 202-213 https://doi.org/10.5467/JKESS.2007.28.2.202
  2. 김원영, 2007, 1-Day Workshop for Seismic Observation and Analysis, 연세대학교 (구전)
  3. 박창업, 신진수, 지헌철, 강익범, 류용규, 1998, 1996년 12월 13 일 영월지진의 진원단층면 방향, 지구물리, 1, 23-30
  4. 연관희, 서정희, 2007, 지진동모델 파라미터 동시역산을 이용한 지진관측소 분류, 물리탐사, 10, 183-190
  5. 연관희, 2007, 한반도 남부지역에 대한 2차원 Q 토모그래피 역 산, 공학박사학위논문, 서울대학교
  6. 연관희, 박동희, 장천중, 2006, 한반도 인근 지역의 Brune 응력강 하량(파라미터) 추정에 대한 고찰, 2006년도 한국지진공학회 학술발표회 논문집, 한국과학기술원, 70-77
  7. 연관희, 박동희, 최원학, 장천중, 2005a, 울진 앞바다 지진 ('04.5.29, M=5.2)의 추계학적 지진동 평가, 한국지진공학회 춘계학술발표회 논문집, 한양대학교, 18-25
  8. 연관희, 박동희, 장천중, 최원학, 이대수, 2005b, 후쿠오카 지진 ('05.3.20, MJMA=7.0)에 대한 일본 인근 지진관측소와 국내 지 진관측소의 주파수응답특성 비교, 지구물리, 8, 15-21
  9. 지헌철, 박정호, 조창수, 강태섭, 2007, 오대산지진의 의미, 2007 년도 한국지진공학회 학술발표회 특별강연, 한양대학교, 70- 77
  10. Aki, K., and Richards, P. G., 2002, Quantitative seismology (2nd Edition), University Science Books
  11. Anderson, J. G., and Hough, S. E., 1984, A model for the shape of the fourier amplitude spectrum of acceleration at high frequencies, Bulletin of Seismological Society of America, 74, 1969-1993
  12. Atkinson, G. M. and Silva, W., 2000, Stochastic modeling of California ground motions, Bulletin of Seismological Society of America, 90, 255-274 https://doi.org/10.1785/0119990064
  13. Atkinson, G. M., 1993, Earthquake source spectra for eastern North America, Bulletin of Seismological Society of America, 83, 1778-1798
  14. Atkinson, G. M., 2006. Single-station sigma, Bulletin of Seismological Society of America, 96, 446-455 https://doi.org/10.1785/0120050137
  15. Boore, D. M., 2003, Simulation of ground motion using the stochastic method, Pure and applied geophysics, 160, 635-676 https://doi.org/10.1007/PL00012553
  16. Brune, J. N., 1970, Tectonic stress and the spectra of seismic shear waves from earthquakes, Journal of Geophysical Research, 75, 4997-5009 https://doi.org/10.1029/JB075i026p04997
  17. Brune, J. N., 1971, Correction, Journal of Geophysical Research, 76, 5002 https://doi.org/10.1029/JB076i020p05002
  18. Centroid Moment Tensor (CMT) Catalog, 2007, http://www. seismology. harvard.edu/CMTsearch. html (last accessed November 2007)
  19. Halldorsson, B., and Papageorgiou, A. S., 2005, Calibration of the specific barrier model to earthquakes of different tectonic regions, Bulletin of the Seismological Society of America, 95, 1276-1300 https://doi.org/10.1785/0120040157
  20. Hanks, T. C., and Kanamori, H., 1979, A moment magnitude scale, Journal of Geophysical Research, 84, 2981-2987
  21. Herrmann, R. B., 2007, http://mnw.eas.slu.edu/Earthquake_ Center/MECH.KR/ (last updated on 2007/08/15), Saint Louis University in U.S.A
  22. Jo, N. and Baag, C. H., 2007, The 20 January 2007, Mw 4.5, Odaesan, Korea, earthquake. Geosciences Journal, 11, 51-58 https://doi.org/10.1007/BF02910380
  23. National Research Institute for Earth Science and Disaster Prevention (NIED), http://www.fnet.bosai.go.jp/freesia/ (last accessed on 2007/08/15)
  24. Papageorgiou, A. S., and Aki, K., 1983, A specific barrier model for the quantitative description of inhomogeneous faulting and the prediction of strong ground motion, Part I. Description of the model, Bulletin of Seismological Society of America, 73, 693-722
  25. Petukhin, A., Irikura, K., Ohmi, S., and Kagawa, T., 2003, Estimation of Q-Values in the seismogenic and aseismic Layers in the Kinki Region, Japan, by elimination of the geometrical spreading effect using ray approximation, Bulletin of the Seismological Society of America, 93, 1498-1515 https://doi.org/10.1785/0120020205
  26. Satoh, T., 2002, Empirical frequency-dependent radiation pattern of the 1998 Miyagiken-Nanbu earthquake in Japan, Bulletin of Seismological Society of America, 92, 1032-1039 https://doi.org/10.1785/0120010153