航空レーザ計測による2007年能登半島地震の地殻変動

概要

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The 2007 Noto Hanto earthquake (M6.9) occurred in the area where the 1m-Digital Elevation Model had been developed by airbone LiDAR. This data package could provide an exceptional opportunity to study crustal deformation associated with the earthquake. We acquired airbone LiDAR data immediately after the 2007 Noto Hanto Earthquake for comparison. We improved the accuracy of DEM to detect earthquake deformation. As a result, differences of elevation between the flight courses were within ±0.05m according to the elevation adjustment for whole area. The resultant elevation change suggests an uplift of the coastal area, including Sekinohana in Shika Town, where a maximum uplift of 0.45m was observed. Elevation changes were not observed 3km from coastline at an extension of the earthquake source fault in sea area. The pattern of the ele-vation change accords well to the results from leveling, GPS, and interferometric SAR data. It was the first attempt in the world to detect crustal deformation associated with an earthquake using airborne LiDAR.
東京大学の論文
2008-03-26