(also Jailolo), an island of the Moluccas, in Indonesia. It has an area of 18,000 sq km. Halmahera has a complex configuration, with four peninsulas extending outward from the central region. The island is mountainous and reaches an elevation of 1,635 m at the active volcano Gamkonoro. The climate is equatorial. The temperature in the coastal regions is 25°–28°C throughout the year, and the annual precipitation totals 2,000–3,000 mm. Evergreen forests are found on the island. Agriculture is tropical in nature; coconuts are an important product. Spices and precious woods, such as ebony, are shipped from the island. The port of Jailolo is located on Halmahera.