Examples of interpretation

Two cases are shown with and without annotations to demonstrate proper interpretation. The Karthala volcano on the Grande Comore Island (near Madagascar) is one of the largest active volcanoes in the world. Fig. 7 shows one of its eruption, during which it released significant amounts of volcanic ash. The animation created from 15-minute Ash RGB images from 24 November 17:00 UTC to 25 November 23:00 UTC shows that the volcano first emitted large amount of volcanic ash and then it released SO2 gas plume as well.

Figure 7: Volcanic eruption near Madagascar on Island Grande Comore for 25 November 2005 at 08:00 UTC with and without annotations (Source: Image library, EUMETSAT homepage, http://www.eumetsat.int/website/home/Images/ImageLibrary/DAT_IL_05_11_25.html)
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Animation 1: Ash RGB animation (from 24 November 17:00 UTC to 25 November 23:00 UTC)

The other case shows the eruption of Nyamuragira, which is the most active volcano in Africa. At November 2006 it released large amounts of sulphur dioxide. The image below show the situation about 36 hours after the start of the eruption. The sulphur dioxide cloud is shown in green.

Figure 8: Volcanic eruption in Africa with and without annotations for 29 November 2006 at 11 UTC (Source: Image Library, EUMETSAT homepage, http://www.eumetsat.int/website/home/Images/ImageLibrary/DAT_IL_06_11_29_A.html)
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