Dust storm in the Thaumasia region of Mars

This Viking Orbiter 2 image shows a large dust storm over the Thaumasia region on Mars.
November 4, 2000
CreditNASA/JPL-Caltech
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This Viking Orbiter 2 image shows a large dust storm over the Thaumasia region on Mars. This large disturbance soon grew into the first global dust storm observed by the Viking Orbiters. This image was taken at 9:00 local time near perihelion when heating of Mars is at a maximum.