Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
권호 표지
DOI QR코드

DOI QR Code

An Analysis of Geomagnetic Variations Related to Earthquakes Location which Occurred in and around the Korean Peninsula from 2012 to 2014

지진 위치와 관련된 지자기장 변동성 분석: 2012년부터 2014년까지 한반도 지역 발생 지진을 중심으로

  • Min, Dongmin (Department of Resources Engineering, Kangwon National University) ;
  • Oh, Seokhoon (Department of Resources Engineering, Kangwon National University) ;
  • Ji, Yoonsoo (Department of Resources Engineering, Kangwon National University)
  • Received : 2015.10.01
  • Accepted : 2015.12.04
  • Published : 2015.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study aimed at the correlation analysis of geomagnetic variations related to earthquakes which occurred in and around the Korean Peninsula from 2012 to 2014. The wavelet-based semblance technique was used to confirm the geomagnetic variations related to earthquakes. As a result, a pattern of consistent geomagnetic variations in total magnetic has been found from the earthquakes occurred within 100 km radius around the observation site. A similar correlation between earthquake location and Z-field geomagnetic data was also confirmed by the wavelet-based semblance analysis. We mainly used the high quality geomagnetic measurements from the Cheongyang Observatory and additionally used the data from the Bohyunsan Observatory in order to validate the correlation between earthquake and Z-field geomagnetic data.

2012년부터 2014년까지 한반도 및 그 주변에서 일어난 지진과 지자기장 변동성과의 상관관계를 연구하였다. 웨이블릿 기반의 셈블런스 분석기술을 지진과 관련된 지자기장 변동성 분석에 사용하였다. 총자기장을 이용한 분석 결과 관측소 반경 100 km 이내에서 발생한 지진의 경우 일관적인 셈블런스 변동양상이 나타남을 확인하였고, Z축 성분 지자기장 자료를 이용한 웨이블릿 기반의 셈블런스 분석에서도 비슷한 변동양상을 확인하였다. 자료 질이 좋은 청양 관측소 지자기장 자료를 중심적으로 분석하였고, 추가적으로 보현산 관측소의 Z축 성분 자료를 해석하여 상관성에 대한 신뢰도를 확인하고자 하였다.

Keywords

References

  1. Cooper, G.R.J., 2009, Wavelet-based semblance filtering. Computers and Geosciences, 35, 1988-1991. https://doi.org/10.1016/j.cageo.2008.10.017
  2. Cryer J.D. and Chan K.-S., 2010, Time series analysis: With application in R. Springer, New York, USA, 491 p.
  3. 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. https://doi.org/10.1016/j.pce.2004.03.002
  4. 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.
  5. Hattori, K., I. Takakhashi, C. Yoshino, N. Isezaki, H. Iwasaki, M. Harada, K. Kawabata, E. Kopytenko, P. Maltsev, V. Korepanov, O. Molchanov, M. Hayakawa, Y. Noda, T. Nagao, and S. Uyeda, 2004. ULF geomagnetic field measurements in Japan and some recent results associated with Iwateken Nairiku Hokubu Earthquake in 1998. Physics and Chemistry of the Earth, 29, 481-494. https://doi.org/10.1016/j.pce.2003.09.019
  6. 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. https://doi.org/10.1029/1999GL005432
  7. Hayakawa, M., K. Hattori, and K. Ohta, 2007. Monitoring of ULF (ultra-low-frequency) geomagnetic variation associated with earthquakes, Sensors, 7(7), 1108-1122. https://doi.org/10.3390/s7071108
  8. Johnston, M., 1997, Review of electric and magnetic fields accompanying seismic and volcanic activity. Surveys in Geophysics, 18, 441-475. https://doi.org/10.1023/A:1006500408086
  9. 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. https://doi.org/10.1016/S0031-9201(97)00094-0
  10. Nordemann, D.J.R., Rigozo, N.R., 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. https://doi.org/10.1016/j.cageo.2007.09.022
  11. Oh, S., Yang, J., Lee, D.-K., and Nam, J.-C., 2002, Geomagnetic depth sounding to investigate the trend of electrical conductivity in and around the Korean peninsula. Economic and environmental geology, 35, 437-444. (in Korean)
  12. Oh, S., 2009, Variation analysis of geomagnetic data observed around the event of Andong earthquake (May 2, 2009). Journal of the Korean Earth Science Society, 30, 683-691. (in Korean) https://doi.org/10.5467/JKESS.2009.30.6.683
  13. Oh, S., 2012. Geomagnetic variation and its relation to microearthquakes in the seismically inactive Korean peninsula. Geoscience Journal, 16(1), 47-58. https://doi.org/10.1007/s12303-012-0001-z
  14. Oh, S. and Ji, Y., 2014, Analysis of Geomagnetic Variations Related to Earthquakes Occurred in and Around the Korean Peninsula form 2009 until 2011. Journal of the Korean Earth Science Society, 30, 429-438. (in Korea)
  15. Rikitake, T. and Honkura, Y., 1985, Solid earth geomagnetism. Terra Science Publish, Tokyo, Japan, 384 p.
  16. Strangand, G. and Nguyen, T., 1996, Wavelets and Filter banks. Wellesley-Cambridge Press, Wellesley, USA, 490 p.
  17. von Frese, R.R.B., Jones, M.B., Kim, J.W., and Kim, J.H., 1997, Analysis of anomaly correlations. Geophysics, 62, 342-351. https://doi.org/10.1190/1.1444136
  18. Yang, J., Oh, S., Lee, D.-K., and Youn, Y.-H., 2002, A study on the difference arrow of GDS (Geomagnetic Depth Sounding) survey using 2-D MT (Magneto-Telluric) modeling. Economic and environmental geology, 35, 567-573. (in Korean)
  19. Yang, J., Lee, D.-K., Kwon, B.-D., and Youn, Y.-H., 2004, On the temporal variability geomagnetic field and transfer function at Icheon observatory. Journal of the Korean Earth Science Society, 25, 604-614. (in Korean)
  20. Yang, J., Lee, H., and Oh, S., 2009. A study on temporal variations of geomagnetic transfer functions and polarization values obtained at cheongyang geomagnetic observatory, Journal of Korean Earth Science Society, 30(7), 824-833. (in Korean) https://doi.org/10.5467/JKESS.2009.30.7.824