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http://dx.doi.org/10.5467/JKESS.2011.32.6.613

Restoration, Prediction and Noise Analysis of Geomagnetic Time-series Data  

Ji, Yoon-Soo (Deparment of Energy and Resources Engineering, Kangwon National University)
Oh, Seok-Hoon (Deparment of Energy and Resources Engineering, Kangwon National University)
Suh, Baek-Soo (Deparment of Energy and Resources Engineering, Kangwon National University)
Lee, Duk-Kee (Earthquake Division, Korea Meteorological Administration)
Publication Information
Journal of the Korean earth science society / v.32, no.6, 2011 , pp. 613-628 More about this Journal
Abstract
Restoration, prediction and noise analysis of geomagnetic data measured in the Korean Peninsula were performed. Restoration methods based on an optimized principal component analysis (PCA) and the geostatistical kriging approach were proposed, and its effectiveness was also interpreted. The PCA-based method seemed to be effective to restore the periodical signals and the geostatistical approach was stable to fill the gaps of measurements. To analyze the noise level for each observatory, the geomagnetic time-series was plotted by scattergram which reflects the spatial variation, using data observed during same period. The scattergram showed that the observation made at Cheongyang seemed to have better quality in spatial continuity and stability, and the restoration result was also better than that of Icheon site. For the restoration, both of the methods, geostatistical and optimizaed PCA, showed stable result when the missing of observation was within 20 points. However, in case of more missing observations than 20 points and prediction problem, the optimized PCA seemed to be closer to the real observation considering the frequency-domain characteristics. The prediction using the optimized PCA seems to be plausible for one day of period for interpretation.
Keywords
geomagnetic data; restoration; prediction; noise analysis;
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Kawate, R., Molchanov, O.A., and Hayakawa, M., 1998, Ultra-low-frequency magnetic fields during the Guam earthquake of 8 August 1993 and their interpretation. Physicsof the Earth and Planetary Interiors, 105, 229- 238.   DOI
2 Nordemann, D.J.R., Rigozo, N.R., de Souza Echer, M.P., and Echer, E., 2008, Principal components and iterative regression analysis of geophysical series: Application to Sunspot number (1750-2004). Computers and Geosciences, 34, 1443-1453.   DOI
3 Oh, S. and Kwon, B., 2001, Geostatistical approach to Bayesian inversion of geophysical data: Markov chain Monte Carlo method. Earth Planets Space, 53, 777-791.   DOI
4 Oh, S., Chung, H., and Lee, D.K., 2004, Geostatistical integration of MT and borehole data for RMR evaluation. Environmental Geology, 46, 1070-1078.   DOI
5 Rikitake, T. and Honkura, Y., 1985, Solid earth geomagnetism. Terra Science Publish, Tokyo, Japan, 384 p.
6 Strangand, G. and Nguyen, T., 1996, Wavelets and Filter banks. Wellesley-Cambridge Press, MA, USA, 490 p.
7 von Frese, R.R.B., Jones, M.B., Kim, J.W., and Kim, J.H., 1997, Analysis of anomaly correlations. Geophysics, 62, 342-351.   DOI
8 오석훈, 양준모, 이덕기, 남재철, 2002, 지자기 수직탐사에 의한 한반도 주변의 전기전도도 구조. 자원환경지질학회지, 35, 437-444.   과학기술학회마을
9 오석훈, 2009, 안동지진(2009년 5월 2일) 발생기간 지자기장 자료의 변동성 분석. 한국지구과학회지, 30, 683-691.
10 Carr, J.R., 1994, Numerical Analysis for the Geological Sciences. Prentice Hall, NJ, USA, 592 p.
11 Cooper, G.R.J. and Cowan, D.R, 2008, Comparing time series using wavelet-based semblance analysis. Computers and Geosciences, 34, 95-102.   DOI
12 Cooper, G.R.J., 2009, Wavelet-baed semblance filtering. Computers and Geosciences, 35, 1988-1991.   DOI
13 Cryer, J.D. and Chan K.-S., 2010, Time series analysis: With application in R. Springer, NY, USA, 491 p.
14 Hayakawa, M., Itoh, T., Hattori, K., and Yumoto, K., 2000, ULF electromagnetic precursors for an earthquake at Biak, Indonesia on February, 17, 1996. Geophysical Research Letters, 27, 1531-1534.   DOI
15 Goovaert, P., 1997, Geostatistics for natural resources evaluation. Oxford University Press, Oxford, UK, 483 p.
16 Harada, M., Hattori, K., and Isezaki, N., 2004, Transfer function approach to signal discrimination of ULF geomagnetic data. Physics and Chemistry of the Earth, 29, 409-417.   DOI   ScienceOn
17 Hatorri, K., Takahashi, I., Yoshino, C., Nagao, T., Liu, J.Y., and Shieh, C.F., 2002, ULF Geomagnetic and Geopotential measurement at Chia-Yi, Taiwan. Journal of Atmospheric Electricity, 22, 217-222.
18 Johnston, M., 1997, Review of electric and magnetic fields accompanying seismic and volcanic activity. Surveys in Geophysics, 18, 441-475.   DOI
19 양준모, 이덕기, 권병두, 윤용훈, 2004, 이천관측소에서 측정된 지자기장 및 지자기 전달함수의 시간적 변동성. 한국지구과학회지, 25, 604-614.   과학기술학회마을
20 양준모, 오석훈, 이덕기, 윤용훈, 2002, 2차원 MT (Magneto-Telluric)모델링을 이용한 지자기 수직탐사 (Geomagnetic Depth Sounding)에서의 차이 지시자의 연 구. 자원환경지질학회지, 35, 567-573.   과학기술학회마을