| Budget Amount *help |
¥29,510,000 (Direct Cost: ¥22,700,000、Indirect Cost: ¥6,810,000)
Fiscal Year 2010: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2009: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2008: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2007: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
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| Research Abstract |
GPS measurements have been observed two times every year at the in north Sumatra since 2007, and MT observations closing the fault. Through the surveys, co-seismic deformation over 3 m and post-seismic deformation over 80 cm horizontally and 50 cm vertically are observed.
We discuss the fault slip model of the 2004 Sumatra Earthquake, largest slip over 20 m is estimated in upper thrust fault extending to ocean bottom from the plate boundary. This estimation shows a good consistent with 1 m uplift in Nias Island.
From a post-seismic deformation especially uplift of 50 cm in the west coast of Banda Aceh, it is suggested large after slip would be occurred in the deeper plate boundary.
We also discuss the fault slip model of the Sumatra fault based on the horizontal deformation deduced the post-seismic deformation from the observed deformation by mode. The creep dislocation of 3 cm/yr in the shallow part of the fault in north Aceh is suggested. Low risibility zones around the fault are detected by MT survey. It also suggested that earthquake occurrence potential is enhanced high in north Sumatra.
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