Did the 12 September 2016 Gyeongju, South Korea earthquake cause surface deformation?
- 50 Downloads
An earthquake with a local magnitude (ML) of 5.8 occurred on 12 September 2016 near Gyeongju, South Korea. This earthquake was the largest event on record in Korea since 1978. A relatively large (ML 5.1) foreshock preceded the main shock by about 50 min, and numerous aftershocks followed. In this study, we performed seismological and geodetic analyses to determine the possibility of the occurrence of surface deformation. Estimated surface deformation using seismological analysis was less than 1 cm, and that observed by geodetic (GNSS and InSAR) data was within the range of error. These results indicate that no surface deformation occurred due to this earthquake. This may have been due to relatively small size of the fault plane (4 km × 4 km), moderate moment magnitude (Mw 5.5) or deep focal depth (15.4 km) of the earthquake.
Key words2016 Gyeongju earthquake moderate earthquake surface deformation geodetic method
Unable to display preview. Download preview PDF.
- Anderson, D.L., 1989, Theory of the Earth. Blackwell Scientific Publications, Boston, 366 p.Google Scholar
- Clark, D., McPherson, A., Allen, T., and Kool, M.D., 2014, Coseismic surface deformation caused by the 23 March 2012 Mw 5.4 Ernabella (Pukatja) Earthquake, Central Australia: Implications for fault scaling relations in cratonic settings. Bulletin of the Seismological Society of America, 104, 24–39.CrossRefGoogle Scholar
- Fujiwara, S., Yarai, H., Kobayashi, T., Morishita, Y., Nakano, T., Miyahara, B., Nakai, H., Miura, Y., Ueshiba, H., Kakiage, Y., and Une, H., 2016, Small-displacement linear surface ruptures of the 2016 Kumamoto earthquake sequence detected by ALOS-2 SAR interferometry. Earth, Planets and Space, 68. doi:10.1186/s40623-016-0534-xGoogle Scholar
- Jo, N.D. and Baag, C.-E., 2001, Stochastic prediction of strong ground motions in Southeastern Korea. Journal of the Earthquake Engineering Society of Korea, 5, 17–26.Google Scholar
- Kim, J.W., Kwon, J.H., and Lee, J.S., 2008, The analysis of the GPS data processing of the NGII CORS by Bernese and TGO. Journal of the Korean society of survey, geodesy, photogrammetry, and cartography, 26, 549–559.Google Scholar
- Kim, K.-H., Kang, T.-S., Rhie, J., Kim, Y., Park, Y., Kang, S.Y., Han, M., Kim, J., Park, J., Kim, M., Kong, C., Lee, H., Park, E., Park, H., Lee, S.-J., Cho, S., Woo, J.-U., Lee, S.-H., and Kim, J., 2016b, The 12 September 2016 Gyeongju earthquakes: 2. Temporary seismic network for monitoring aftershocks. Geosciences Journal, 20, 753–757.CrossRefGoogle Scholar
- Lee, W.J., Lu, Z., Jung, H.S., and Ji, L., 2017, Measurement of small coseismic deformation field from multi-temporal SAR interferometry: Application to the 19 September 2004 Huntoon valley earthquake. Geomatics, Natural Hazards and Risk. doi: 10.1080/19475705. 2017.1310764Google Scholar
- Lohman, R.B., Simons, M., and Savage, B., 2002, Location and mechanism of the Little Skull Mountain earthquake as constrained by satellite radar interferometry and seismic waveform modeling. Journal of Geophysical Research, 107. doi:10.1029/2001JB000627Google Scholar
- Nakano, T., Kobayashi, T., Yoshida, K., and Fujiwara, S., 2016, Field survey of non-tectonic surface displacements caused by the 2016 Kumamoto Earthquake around Aso Valley. Bulletin of the Geospatial Information Authority of Japan, 64, 47–54.Google Scholar
- Okada, Y., 1992, Internal deformation due to shear and tensile faults in a half-space. Bulletin of the Seismological Society of America, 82, 1018–1040.Google Scholar
- Ozawa, T., Fujita, E., and Ueda, H., 2016, Crustal deformation associated with the 2016 Kumamoto Earthquake and its effect on the magma system of Aso volcano. Earth, Planets and Space, 68. doi:10.1186/s40623-016-0563-5Google Scholar
- Udías, A., 1999, Principles of Seismology. Cambridge University Press, Cambridge, 475 p.Google Scholar