A Correction to the article "Geo-center movement caused by huge earthquakes" by Wenke Sun and Jie Dong. (July 2015)

• Record Type: Journal Article
• Authors: Zhou, Jiangcun; Sun, Wenke; Dong, Jie
• Is Part Of: Journal of geodynamics. Volume 87(2015)
• Page Start: 67
• Page End: 73
• Publication Date: 2015-07
• Subjects: Co-seismic geo-center movement -- Dislocation theory -- Center of figure of the Earth -- Center of mass of the Earth; Geodynamics -- Periodicals; Earth movements -- Periodicals; Rock deformation -- Periodicals; Earth -- Internal structure -- Periodicals; 551.1
• DOI: 10.1016/j.jog.2015.02.003
• Languages: English
• ISSNs: 0264-3707

Abstract

Abstract: Sun and Dong (2014) studied the co-seismic geo-center movement using dislocation theory for a spherical earth model. However, they incorrectly considered the maximum vertical co-seismic displacement as the rigid geo-center motion (i.e., they did not separate the rigid shift and elastic deformation). In this paper, we correctSun and Dong (2014) by using a new approach. We now define the geo-center motion as a shift of the center of figure of the Earth relative to the center of mass of the Earth. Furthermore, we derive new formulas to compute the co-seismic geo-center and inner core's center movements caused by huge earthquakes. The 2004 Sumatra earthquake and the 2011 Tohoku-Oki earthquake changed the geo-center by 1–4 mm and about 2 mm, respectively, and caused the inner core's center to displace by about 0.05 mm and 0.025 mm, respectively.