NASA's Mars Global Surveyor shows a group of three large afternoon dust devils occurring within several kilometers of each other in northwestern Amazonis on Mars during the northern summer in November 2004.

14 January 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image, acquired during northern summer in November 2004, shows a group of three large afternoon dust devils occurring within several kilometers of each other in northwestern Amazonis. The image covers an area 3 km (1.9 mi) wide and was obtained with a spatial resolution of 12 meters (13 yards) per pixel. This scene is located near 36.2°N, 157.6°W. Sunlight illuminates the dust devils from the left.

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