Hanish volcano forms a group of islands in the Red Sea between Eritrea and Yemen. These include the 20 km long Great Hanish, Little Hanish, and many other small islands and submarine shoals.
The volcano contains a number of volcanic vents aligned NE-SW and consists of lava shields and cinder cones.
Eruptions on the Hanish islands often start with phreatic explosions that open new vents, then enter phases with lava fountains building up cinder cones, and then continue and end with effusion of fluid lava flows.
The islands of the Greater Hanish archipelago in the Red Sea were disputed with fighting between Eritrea and Yemen in December 1995. In 1998 the Permanent Court of Arbitration determined that the most of archipelago belonged to Yemen.
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