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http://dx.doi.org/10.11108/kagis.2011.14.4.137

Seismic Displacement Analysis of GPS Permanent Stations in Korean and Asian Area Due to the Tohoku-Oki Mega-Thrust Earthquake  

Hwang, Jin-Sang (Department of Architectural and Environmental System Engineering, SungKyunKwan University)
Yun, Hong-Sic (Department of Civil and Environmental Engineering, SungKyunKwan University)
Lee, Dong-Ha (Department of Architectural and Environmental System Engineering, SungKyunKwan University)
Jung, Tae-Jun (Department of Architectural and Environmental System Engineering, SungKyunKwan University)
Suh, Yong-Cheol (Department of Spatial Information Engineering, Pukyong National University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.14, no.4, 2011 , pp. 137-149 More about this Journal
Abstract
In this study, we analyzed the effects of seismic displacements due to the mega thrust earthquake occurred near Tohoku-Oki area on Mar. 11, 2011 with Mw 9.0 magnitude in the context of evaluation of position change by the earthquake on the Korean and Asian GPS permanent stations. For this, two weeks GPS data observed around the event of Tohoku-Oki earthquake (Mar. 4 ~ Mar. 18, 2011) were obtained from 22 GPS permanent stations in the vicinity of epicenter (Korea, Japan, Russia, China and Taiwan) and 284 IGS global stations. All available GPS data were processed and adjusted by GAMIT/GLOBK software to estimate the co-seismic horizontal displacements at each station. As the results of GPS analysis, the co-seismic displacements due to Tohoku-Oki earthquake were clearly revealed in the GPS stations of Asian region, Japan and its neighboring countries, and even to affect the horizontal position of GPS station (WUHN in China) which are located about 2,702km away from the epicenter. In conclusion, it was found that the Tohoku-Oki earthquake had resulted in the horizontal displacements ranging from 14.9 mm to 58.3 mm in Korea. So, these displacements can cause the position error of GPS geodetic survey up to 20 mm without updating the coordinates of Korean geodetic network.
Keywords
Tohoku-Oki Earthquake; GPS Permanent Station; Seismic Displacement; GAMIT/GLOBK;
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