Journal
EARTH PLANETS AND SPACE
Volume 56, Issue 7, Pages 675-680Publisher
SPRINGER
DOI: 10.1186/BF03352530
Keywords
Tokachi-oki earthquake; coseismic deformation; afterslip; postseismic deformation
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The permanent Global Positioning System (GPS) array in Japan detected coseismic and postseimic deformation of the 2003 Tokachi-oki earthquake (M-w) 8). We estimate the time evolution of its postseismic slip, together with its coseismic slip distribution. The result shows that the postseismic slip has been occurring mainly in an area adjacent to he coseismic slips, propagating to the northeast and southwest. This suggests that, as of March 6, 2004, the postseismic slip of the strongly coupled area neighboring the coseismic rupture partly released seismic moment, equivalent to an earthquake of M-w 7.8.
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