Another Hot Spot: Mt. KARTHALA, Comoros Posted by Granyia on 2016-10-28 Posted in: Africa, Eruptions-historic, Volcanoes. Tagged: Caldera, Comoros, Grande Comore, Hotspot, La Grille, Mount Karthala, Ngazidja, phreato-magmatic, Rift. 19 Comments The pit crater Changouméni (created 1918?) in the northern lobe of the Karthala caldera is filled to the brim with new lava. 17/01/2007. (© OVK) Continue Reading Advertisement