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Earthquake Engineering Research - HKU Libraries - The University ...

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153<br />

Red: possible impacted areas Gray: saturated data<br />

Figure 8: Estimated damaged area in the Marmara <strong>Earthquake</strong> Disaster<br />

5. APPLICATION OF BOTH METHODS TO THE GUJARAT, INDIA EARTHQUAKE<br />

DISASTER<br />

We estimated the possible impacted areas of Gujarat, India <strong>Earthquake</strong> Disaster on January 26, 2001<br />

using basic and new method of EDES. <strong>The</strong> VNIR and TIR image on January 24 shown in Figure 9<br />

and 10 was selected as an image before the earthquake. Figure 11 and 12 shows VNIR and TIR<br />

images after the earthquake. <strong>The</strong>se images were used for basic method. <strong>The</strong> distribution of the<br />

average and standard deviation of digital number with each pixel for new method are shown in Figure<br />

13 and 14. <strong>The</strong> estimated damaged areas using basic method and new one are shown in Figure 15 and<br />

16. <strong>The</strong> estimated impacted areas spread in Gandhi Dham, Bhuj and Morbi. Some low reliability<br />

estimation areas caused by cloud, water or other reasons remain in basic method estimation image<br />

(Fig. 15), but there exist no such areas in new method estimation image (Fig. 16). Comparing these two<br />

estimation results, it is revealed that new method estimation is better than basic one.

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