North Lombok is dominated by the 3,726 m Mount Rinjani, an active stratovolcano. Rinjani is also the second highest volcano in Indonesia, second only to Mount Kerinci on Sumatra and is Indonesias third highest peak. The volcano last erupted at the Barujari site in May 2010 with active lava flows and ash projected high into the sky with ash plumes rising to an altitude of 5.5 km. Within its 50 square kilometre caldera sits the crater lake Segara Anak (Child of the Sea). Eruptions within the caldera have formed a small cone called Gunung Baru (New Mountain).