VIIRS “split window difference” image (M-15 – M-16) taken 18:38 UTC 22 December 2012

VIIRS "split window difference" image (M-15 - M-16) taken 18:38 UTC 22 December 2012

VIIRS “split window difference” image (M-15 – M-16) taken 18:38 UTC 22 December 2012

VIIRS “split window difference” image (M-15 – M-16) taken 18:38 UTC 22 December 2012. The yellow arrow points to the Copahue volcano. The red arrow points to the ash plume highlighted by the split window difference that is difficult to see in the true color image.

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