Global Volcanism Program | Image GVP-11179
Ale Bagu, also known as Ummuna, is an elongate stratovolcano (left center) located SW of Erta Ale, the volcano at the top-center showing a small orange lava lake. In contrast to other volcanoes of the Erta Ale Range, Ale Bagu is mantled by basaltic pyroclastic rocks. The main crater is a steep-walled, 750 x 450 m depression. Trachytic lava flows occupy the crater floor and silicic lavas from the axial regional fissure extend to the NW and SE. Lake Giulietti (also known as Lake Afrera) is at the lower right.
NASA Landsat image, 1999 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology).