Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Analysis of Crust Deformation on the Korean Peninsula after the Tohoku Earthquake using GNSS Observation

GNSS를 이용한 동일본대지진 이후 한반도 지각변동 해석 연구

  • Kim, Hee Un (Earthquake and Volcano Research Division, Earthquake and Volcano Bureau, Korea Meteorological Administration) ;
  • Hwang, Eui-Hong (Earthquake and Volcano Research Division, Earthquake and Volcano Bureau, Korea Meteorological Administration) ;
  • Lee, HaSeong (Earthquake and Volcano Research Division, Earthquake and Volcano Bureau, Korea Meteorological Administration) ;
  • Lee, Duk Kee (Earthquake and Volcano Research Division, Earthquake and Volcano Bureau, Korea Meteorological Administration)
  • Received : 2020.11.25
  • Accepted : 2020.12.21
  • Published : 2020.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

It is known through prior research that the crust of the Korean Peninsula moves southeast at an annual average of 3 cm/year. The 2011 Great East Japan Earthquake caused a great change in the crust of the Korean Peninsula. Since then, the frequency of earthquakes has increased on the Korean Peninsula. Therefore, by using NGII and IGS GNSS observation data of the recent 15 years, to analyze the trends of changes in the deformation of the Korean Peninsula before and after the outbreak of the Great East Japan Earthquake. Data processing utilized Bernese Software V5.2, a widely used scientific and technical software around the world. As a result, the global movement of the Korean peninsula differed by about 4mm and the direction of movement by about 10° compared to before the Great East Japan Earthquake. As for the internal distortion of the Korean Peninsula, the East-West expansion of the Korean peninsula's crust was observed during the Great East Japan Earthquake, but it is believed that it has not fully returned to the level before the Great East Japan Earthquake.

한반도 지각은 남동쪽으로 연평균 3cm의 속도로 이동하고 있다고 선행연구를 통해 알려져 있다. 2011년 동일본대지진에 의해 한반도 지각에는 큰 변동이 발생했다. 이후 한반도에서는 지진의 발생빈도가 증가하였다. 따라서 최근 15년간의 국내 및 국외 GNSS (Global Navigation Satellite System) 관측자료를 이용하여 동일본대지진 발생시점을 기준으로 한반도 지각변동 추세를 분석하였다. 자료처리는 전 세계적으로 많이 사용되고 있는 과학 기술용 소프트웨어 Bernese Software V5.2를 활용하였다. 그 결과 한반도는 동일본대지진 발생 전보다 이동 크기는 약 4mm, 이동 방향은 약 10° 차이가 발생했다. 한반도 내부 지각의 왜곡 현상은 동일본대지진 당시 한반도 지각의 동서 팽창 현상이 관측되었는데 최근까지 동일본대지진 이전의 수준으로 완전히 복귀하지 않은 것으로 판단된다.

Keywords

References

  1. Dach, R., Lutz, S., Walser, P., and Fridez, P. (2015), Bernese GNSS software version 5.2.
  2. Gu, G., Wang, W., Xu, Y., and Li, W. (2009), Horizontal crustal movement before the great Wenchuan earthquake obtained from GPS observations in the regional network, Earthquake Science, Vol. 22, pp. 471-478. https://doi.org/10.1007/s11589-009-0471-x
  3. Ha, J., Lee, M.K., and Cho, Y.S. (2013), Analysis of Korea's Crustal Movement Velocity After the Great Tohoku-Oki Earthquake by Using GPS. Journal of Advanced Navigation Technology, Vol. 17, No. 6, pp. 600-608. https://doi.org/10.12673/jkoni.2013.17.6.600
  4. Hong, T.K., Lee, J., and Houng, S.E. (2015), Long-term evolution of intraplate seismicity in stress shadows after a megathrust, Physics of the Earth and Planetary Interiors, Vol. 245, pp. 59-70. https://doi.org/10.1016/j.pepi.2015.05.009
  5. Kim, D., Park, K.D., Ha, J., Sohn, D.H., and Won, J. (2016), Geodetic analysis of post-seismic crustal deformations occurring in South Korea due to the Tohoku-Oki earthquake. KSCE Journal of Civil Engineering, Vol. 20, No. 7, pp. 2885-2892. https://doi.org/10.1007/s12205-016-0086-4
  6. Kim, S.K. (2012), Establishing a Dynamic National Geodetic Reference Frame Considering Discontinuity of Crustal Movement, Master's thesis, Sejong University, Seoul, Korea, 160p.
  7. Kim, S.K. and Bae, T.S. (2012), Analysis of Crustal Deformation on the Korea Peninsula after the 2011 Tohoku Earthquake, Journal of the Korean Society of Surveying, Vol. 30, pp. 87-96.
  8. Korea Meteorological Administration, https://www.weather.go.kr/weather/earthquake_volcano/domesticlist.jsp/ (last date accessed: 17 November 2020).
  9. Lee, W.C. (2005), A Study on the Crustal Velocity Estimation of the Korean Peninsula with GPS, Master's thesis, Sungkyunkwan University, Seoul, Korea, 54p.
  10. Lim, S.K. (2011), Analysis of Korean Peninsula's crustal by Big Earthquake of Eastern Japan, Master's thesis, Kyungpook National University, 56p.
  11. Ma, K.F., Chan, C.H., and Stein, R.S. (2005), Response of seismicity to Coulomb stress triggers and shadows of the 1999 Mw= 7.6 Chi-Chi, Taiwan, earthquake, Journal of Geophysical Research: Solid Earth, Vol. 110, Issue. B5.
  12. Maciuk, K., and Szombara, S. (2018), Annual crustal deformation based on GNSS observations between 1996 and 2016, Arabian Journal of Geosciences, Vol. 11, pp. 667. https://doi.org/10.1007/s12517-018-4022-4
  13. Song, D.S., and Yun, H.S. (2006), Crustal Deformation Velocities Estimated from GPS and Comparison of Plate Motion Models, KSCE Journal of Civil and Environmental Engineering Research, Vol. 26, pp. 877-884.
  14. Park, J.K. and Kim, M.G. (2012), Monitoring about Crustal Deformation by Earthquake in the East of Japan, Journal of the Korea Academia-Industrial cooperation Society, Vol. 13, pp. 2390-2395. https://doi.org/10.5762/KAIS.2012.13.5.2390
  15. Won, J., Park, K., and Huh, J. (2012), Analysis of post-seismic crustal deformation associated with the 2011 Tohoku earthquake in Korean peninsula using GPS. American Geophysical Union Fall Meeting 2012.