Map of the Kolumbo submarine crater and other submarine cones on the north-east trending Kolumbo volcano-tectonic rift. Figure courtesy of Haraldur Sigurdsson, Steven Carey, Matina Alexandir and Katy Croff. (from: http://oceanexplorer.noaa.gov/explorations/06blacksea/logs/summary_thera/summary_thera.html)