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Kitakami River Mouth (Ishinomaki City, Miyagi Pref.)
Changed detection analysis with ALOS AVNIR-2 data
All ALOS data was donated by the Japan Aerospace Exploration Agency (JAXA) and the Remote Sensing Technology Center of Japan (RESTEC)

        
Image date 2011/3/14  Sensor : ALOS AVNIR-2   Data: True Color
Date: 2008/12/16 (Before earthquake) Date: 2011/3/14 (Three days after earthquake)
Following image shows differential analysis result of near-infrared spectral band images between two periods, before and after earthquake. Near-infrared spectral band images clearly distinguish water surface from the other features, because water absorbs light of near-infrared spectral band. Blue colored regions feature the area changed to watered area after earthquake. Red colored regions seem to be debris on the water surface. For focusing analysis to the damaged area, result of differential analysis is extracted to the area, which height is less than fifteen meters.
Result of Differential analysis(Environmental Change Extraction) Overlay Differential analysis result with Satellite image three days after earthquake (2011/03/14)