The Deriba Crater is at the highest point of Jebel Marra in Darfur, in the West of Sudan, at an elevation of 3,042 m (9,980 ft). Depending on which article one reads, it is between 5km and 8km in diameter across the outer crater.

Geocode for Deriba Lakes, Jebel Marra, Darfur, Sudan
Latitude: 12.9666667 / Longitude: 24.2666667
Latitude 12.95° / Longitude: N 24.27° E
Cut and paste this into the Search box on Google Earth : 12.9666667 24.2666667

The inner and outer craters, Deriba Crater, Jebel Marra, Darfur, Sudan

The following pages link to Deriba Crater :-

Darfur
Marrah Mountains Darfur (Arabic دار فور, meaning home of the Fur) is a region of far western Sudan, bordering the Central African Republic, Libya, and Chad. ... Marrah Mountains (Arabic: Jebel Marra meaning bad mountain) is a range of volcanic peaks rising up to 3,000 m, in the center of the Darfur region of Sudan. ...

The following are other interesting articles about the crater :-

Maps & Images
Location map (small scale) : [1]
Satellite image (large scale) : [2]
Oblique aerial photo on page 27 (large scale) : [3]

Volcanics
Abstract : [4] Tephra catalog of the world (about 26 lines down) : [5] Global Volcanism Program : [6] Keeping planets cool: volcanoes, hotspots, and plate tectonics : [7] Comparing Jebel Marra with a volcanoes on Mars (Alba Patera): [8]

Hydrothermal Power potential
(UNESCO) Fact-finding mission to Sudan, 8-20 May 2001: for an investigation of Sudan's Geothermal Resources, The Jebel Marra Area : [9]

Mosquitoes
The Culex mosquitos of the Sudan : [10]

Other articles
The Jebel Marra, Darfur, and Its Region J. H. G. Lebon, V. C. Robertson The Geographical Journal, Vol. 127, No. 1 (Mar., 1961), pp. 30-45 [11]

Notes on Jebel Marra, Darfur H. F. C. Hobbs The Geographical Journal, Vol. 52, No. 6 (Dec., 1918), pp. 357-363 [12]

Sources of Water in the North-Western Sudan K. S. Sandford The Geographical Journal, Vol. 85, No. 5 (May, 1935), pp. 412-431 [13]