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The Izmit earthquake project

This study was carried out in support to the studies and research activities on the monitoring of natural disasters conducted by CNES: improvement of techniques and tools, evaluation of the SAR capabilities, and of its merging capability with optical data sources for the monitoring of natural hazards and of the temporal variations of the surface state in areas affected by a natural disasters.

The study area was the region of Izmit (Turkey), which suffered badly from the earthquake of August 17, 1999.

The data made available by CNES were 4 ERS SLC SAR images: 1 interferometric couple acquired before the earthquake, and 1 interferometric couple acquired in September 1999.

In this project, ParBleu's team was in charge of the demonstration of SAR correlation capabilities to detect the movement of a tectonic fault (the North Anatolian fault) and of the evaluation of material damages within urban areas using ERS SAR data ((tm)DYNAMIC-RADAR products).

Izmit

Superimposition of the 12/13 August ERS images (in red) and the 16/17 September ERS images (in green/blue).

Tectonic plate displacement

Using ERS orbital parameters to ensure the best possible accuracy a spatial resolution of 20x20 meters is obtained.
Note the displacement between the August and September images:

  • September images (blue) are displaced towards right in the upper part of the scene towards left in the lower part of the scene.
  • August images (red) are displaced towards left in the upper part of the scene towards right in the lower part of the scene.

    These displacements represent the displacement of the geological fault during the earthquake.




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    Last Updated: 10 May 2006
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