Fig. 1

Tectonic setting of the Afar triple junction. The red triangles are active Holocene volcanoes (Venzke 2013). The magenta line represents the plate boundary (Bird 2003). The black circles represent the locations of the epicenters of Earthquakes (M\(_\text{w} > 4\)). Most of the Earthquakes in the region have shallow depths. The black text framed in magenta provides the names of the different plates (Bird 2003): AFn, African (Nubian) plate; AFs, African (Somalian) plate; Ar, Arabian plate. The green text framed in blue provides the names of the three rifts: ER, Eden rift; GA, Gulf of Aden; R,- Red Sea rift. The blue text framed in brown (Af) indicates the location of the Afar triple junction