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Recent Mars and Earth Dust Storms Compared
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Recent Mars and Earth Dust Storms Compared

March 19, 2003
In this figure, we compare a recent dust storm on Mars with one that occurred earlier this year on Earth. The top image shows a martian northpolar dust storm observed on 29 August 2000. The storm is moving as a front, outward from a central "jet," and marginal "vortices" can be seen. In this image it extends about 900 km (560 mi) out from the north polar seasonal frost cap. The region on the right sideof the Mars picture includes the north pole. The bottom image shows a terrestrial dust storm, seen in a SeaWiFS image, acquired on 26 February 2000. This storm extends about 1800 km (1100 mi) off the coast of northwest Africa near the Earth's equator.


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