Bathymetric and topographic map of the Gulf of Aden area (Smith & Sandwell 1994). Solid lines show of the Encens-Sheba cruise tracks where bathymetry, magnetic and gravity have been acquired. The bold black lines indicate the location of the seismic profiles (d'Acremont 2005). Solid arrows show the plate displacement and the associated rate (Jestin 1994). Inset: general map location with the Aden/Sheba and Carlsberg ridges.