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Location of Recent Micro-earthquakes in the Gyeongju Area
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  • Journal title : Geophysics and Geophysical Exploration
  • Volume 19, Issue 2,  2016, pp.97-104
  • Publisher : Korean Society of Earth and Exploration Geophysicists
  • DOI : 10.7582/GGE.2016.19.2.097
 Title & Authors
Location of Recent Micro-earthquakes in the Gyeongju Area
Han, Minhui; Kim, Kwang-Hee; Son, Moon; Kang, Su Young; Park, Jung-Ho;
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 Abstract
Small to large earthquakes have been reported in Gyeongju and its vicinity in southeast Korea during historical period as well as instrumental observation period. We identified and located more than 300 earthquakes that occurred between January 2010 and December 2014 in a area, but were unreported because of their small magnitudes. We used the Joint Hypocenter Determination (JHD) method to minimize the influence of the differences between the actual earth structure and 1-D velocity model for earthquake locations. The potential relationship between the previously reported Quaternary faults and the earthquake hypocenters was investigated. Many micro-earthquakes were found to be located in the southern segment of the Yeonil Tectonic Line, the Seokup fault, and the Waup basin boundary faults.
 Keywords
Gyeongju;micro-earthquakes;earthquake hypocenters;Yeonil Tectonic Line;Seokup fault;Waup basin;
 Language
Korean
 Cited by
 References
1.
Baag, C.-E., and Kang, D. J., 1994, Geophysical Studies on Major Faults in the Gyeongsang Basin: Aeromagnetic and Radiometric Data Interpretation on the Ulsan Fault, Journal of Geological Society of Korea, 30, 193-205.

2.
Chang, T. W., 2001, Quaternary Tectonic Activity at the Eastern Block of the Ulsan Fault, Journal of the Ggeological Society of Korea, 37, 431-444.

3.
Chiu, J.-M., and Kim, S. G., 2004, Estimation of Regional Seismic Hazard in the Korean Peninsula Using Historical Earthquake Data between A.D. 2 and 1995, Bulletin of the Seismological Society of America, 94, 269-284. crossref(new window)

4.
Choi, W.-H., 2003, Neotectonics of the Gyeongju-Ulsan Area in the Southeastern Part of Korean Peninsula, Ph.D., Seoul National University, Seoul, Korea.

5.
Gibbons, S. J., and Ringdal, F., 2006, The detection of low magnitude seismic events using array-based waveform correlation, Geophysical Journal International, 165, 149-166. crossref(new window)

6.
Jo, W.-R., Okada, A., Jun, M.-S., Kim, S. K., Watanave, M., Sato, H., Jeon, J. S., and Chi, H. C., 1994, Active fault topography and trench survey in the central part of the Yangsan fault, southeast Korea, Journal of the Korea Geomorphological Association, 1, 67-83.

7.
Jun, M.-S., 1991, Body-wave analysis for shallow intraplate earthquakes in the Korean peninsula and Yellow Sea, Tectonophysics, 192, 345-357. crossref(new window)

8.
Kim, I.-S., Son, M., Jung, H.-J., Lee, J.-D., Kim, J.-J., and Paik, I. S., 1997, Geological Characteristics of Kyongju-Ulsan Area: Paleomagnitism and Magnetic Susceptibility of the Granitic Rocks in the Ulsan Fault Area, Economic and Environmental Geology, 31, 31-43.

9.
Kim, J. H., Kang, P. C., and Lim, D. H., 1976, A Study of the Relation between Geologic Structures and Ore Deposits in Ryeongnam Province using Landsat-1 Images, Journal of the geological society of Korea, 12, 79-89.

10.
Kim, K.-H., Chiu, J.-M., Pujol, J., and Chen, K.-C., 2005, Earthquake Relocations, Fault Zone Geometry and Constraints on Lateral Velocity Variations using the Joint Hypocenter Determination Method in the Taiwan Area, Earth, Planets and Space, 57, 809-823. crossref(new window)

11.
Kim, K.-H., and Park, Y., 2010, The January 2007 $M_L$ 4.8 Odaesan Earthquake and Its Implications for Regional Tectonics in Korea, Bulletin of the Seismological Society of America, 100, 1395-1495. crossref(new window)

12.
Kim, K.-H., Ryoo, Y.-G., Yu, C., Kang, S. Y., and Kim, H.-J., 2011, Relocation of Youngduk Offshore Micro-earthquakes, Jigu-Muli-wa-Mulli-Tamsa, 14, 267-273.

13.
Kim, S. K., Jun, M.-S., and Jeon, J.-S., 2006, Recent Research for the Seismic Activities and Crustal Velocity Structure, Economic and Environmental Geology, 39, 369-384.

14.
Kim, W.-Y., Choi, H., and Noh, M., 2010, The 20 January 2007 Odaesan, Korea, earthquake sequence; reactivation of a buried strike-slip fault?, Bulletin of the Seismological Society of America, 100, 1120-1137. crossref(new window)

15.
Kim, W., 1999, P-wave velocity structure of upper crust in the vicinity of the Yangsan Fault region, Geosciences Journal, 3, 17-22. crossref(new window)

16.
Kyung, J. B., and Atsumasa, O., 1995, Liquefaction Phenomena due to the Occurrences of Great Earthquakes: Some Cases in Central Japan and Korea, Journal of Geological Society of Korea, 31, 237-250.

17.
Kyung, J. B., Jung, M. K., Baek, J. J., Im, Y. J., and Lee, K., 2010, Historic Earthquake Catalog in the Korea Peninsula, 475, Seoul, Korea Meteorological Administration.

18.
Lahr, J. C., 1999, HYPOELLIPSE: A Computer Program for Determining Local Earthquake Hypocentral Parameters, Magnitude, and First-Motion Pattern (Y2K Compliant Version), Denver, U.S. Geological Survey.

19.
Lee, K., and Um, C. R., 1992, Geoelectric Survey of the Ulsan Fault: Geophysical Studies on Major Faults in the Kyeongsang Basin, Journal of Geological Society of Korea, 28, 32-39.

20.
Lee, K., and Yang, W.-S., 2006, Historical Seismicity of Korea, Bulletin of the Seismological Society of America, 96, 846-855, doi:810.1785/0120050050. crossref(new window)

21.
Lee, Y.-H., 2003, Quaternary faults in the eastern area of the Ulsan Fault, Master, Pusan National University, Pusan, Korea.

22.
NECIS, 2015, National Earthquake Comprehensive Information System, Historic Earthquakes.

23.
Pujol, J., 1995, Application of the JHD technique to the Loma Prieta, California, Mainshock-Aftershock Sequence and Implications for Earthquake Location, Bulletin of the Seismological Society of America, 85, 129-150.

24.
Rhie, J., and Kim, S., 2010, Regional moment tensor determination in the southern Korean Peninsula, Geosciences Journal, 14, 329-333. crossref(new window)

25.
Son, M., Chong, H.-Y., and Kim, I.-S., 2002, Geology and Geological Structures in the Vicinities of the Southern Part of the Yonil Tectonic Line, SE Korea, Journal of the geological society of Korea, 38, 175-197.

26.
Son, M., Kim, J.-S., Chong, H.-Y., Lee, Y.-H., and Kim, I.-S., 2007, Characteristics of the Cenozoic crustal deformation in SE Korea and their tectonic implications, Korean Journal of Petroleum Geology, 13, 1-16.

27.
Son, M., Song, C. W., Kim, M.-C., Cheon, Y., Cho, H., and Shon, Y. K., 2015, Miocene tectonic evolution of the basins and fault systems, SE Korea: dextral, simple shear during the East Sea (Sea of Japan) opening, Journal of the Geological society, 172, 664-680. crossref(new window)