, North Sumbawa in March 2012 The island is bounded by bodies of water on all sides; to the west is the
Alas Strait, which separates it from Lombok; to the south is the
Indian Ocean, with
Cempi Bay and
Waworada Bay providing major indentations along the south coast; the
Sape Strait lies to the east of the island and separates Sumbawa from
Flores and the Komodo Islands; the
Flores Sea runs the length of the northern coastline, where
Saleh Bay creates a major north-central indentation in the island, almost cutting the island in two parts, and other inlets include most notably
Bima Bay. Sumbawa's most distinguishing features are Saleh Bay and the Sanggar Peninsula. On the latter stands Mount Tambora (8°14’41” S, 117°59’35” E), a large
stratovolcano famous for its
VEI 7 eruption in 1815, one of only a few eruptions of such magnitude in the last 2,000 years. The eruption obliterated most of Tambora's summit, reducing its height by about a third and leaving a six-kilometer-wide
caldera. Regardless, Tambora remains the highest point on the island. Highlands rise in four spots on the island, as well as on Sangeang Island. The large western lobe of Sumbawa is dominated by a large central highland, and Tambora, Dompu, and Bima each have more minor highlands. There are several large surrounding islands, most notably
Moyo Island, volcanically active Sangeang Island, and the touristic
Komodo Islands (administered under
East Nusa Tenggara Province) to the east. Sumbawa is part of the
Lesser Sunda deciduous forests ecoregion.
List of offshore islands There are several smaller offshore islands which fall within the regencies based on Sumbawa Island: • West Sumbawa Regency • Susait • Dua • Belang • Songi • Ular • Kenawa • Natano • Sumbawa Besar Regency • Panjang Island • Saringi • Kemudang • Ayer Tawat • Romo •
Medang Island •
Saleh Bay, Sumbawa Besar Regency •
Moyo Island • Dangar Besar • Liang • Ngali • Tengar • Kelapang • Dompo • Takebo • Paming • Lipa • Rakit • Dompu Regency • P. Besar • P. Nisa Pudu • P. Nisa Rate • Bima Regency, Tambora Peninsula exclave •
Satonda Island • Bima Regency •
Sangeang Island • Sanai Island •
Matagate Island •
Banta Island ==Economy==