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Uplift of a Coral Island in the Andaman Sea Due to the 2004 Sumatra Earthquake Measured Using Remote Sensing Reflectance of Water

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2 Author(s)

The 2004 Sumatra earthquake, together with the tsunami that followed, caused massive destruction in many coastal areas of the Indian Ocean. Uplift and subsidence of land near the epicenter of the earthquake in the Andaman Sea have been reported. In this letter, we report observations of the uplift in high-resolution SPOT-5 satellite images in a coral island near the Andaman Islands. The depth of the submerged reefs was measured using water reflectance models commonly employed in the ocean color research community. The uplift magnitude was estimated by the difference in water depth measured in the pre- and post-earthquake images, taking into account the difference in tide levels. The uplift was found to be 1.6 m with an uncertainty of about 0.3 m. The methodology could be widely used for efficient estimation of shallow water depth of broad areas, particularly over shallow coral reefs.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:5 ,  Issue: 4 )

Date of Publication:

Oct. 2008

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