Halmahera in the context of "Sofifi"

The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine Archipelago and the largest sea in the world, occupying an estimated surface area of 5 million square kilometers (2×10^ sq mi). The Philippine Sea Plate forms the floor of the sea. Its western border is the first island chain to the west, comprising the Ryukyu Islands in the northwest and Taiwan in the west. Its southwestern border comprises the Philippine islands of Luzon, Catanduanes, Samar, Leyte, and Mindanao. Its northern border comprises the Japanese islands of Honshu, Shikoku and Kyūshū. Its eastern border is the second island chain to the east, comprising the Bonin Islands and Iwo Jima in the northeast, the Mariana Islands (including Guam, Saipan, and Tinian) in the due east, and Halmahera, Palau, Yap and Ulithi (of the Caroline Islands) in the southeast. Its southern border is Indonesia's Morotai Island.

The sea has a complex and diverse undersea relief. The floor is formed into a structural basin by a series of geologic faults and fracture zones. Island arcs, which are actually extended ridges protruding above the ocean surface due to plate tectonic activity in the area, enclose the Philippine Sea to the north, east and south. The Philippine archipelago, Ryukyu Islands, and the Marianas are examples. Another prominent feature of the Philippine Sea is the presence of deep sea trenches, among them the Philippine Trench and the Mariana Trench, containing the deepest point on the planet.

Morotai Island Regency (Indonesian: Kabupaten Pulau Morotai) is a regency of North Maluku province, Indonesia, located on Morotai island (Indonesian: Pulau Morotai). It covers an area of 2,336.6 km including the smaller Rao Island to the west of Morotai. The population was 52,860 at the 2010 census and 74,436 at the 2020 census; the official estimate as at mid 2023 was 80,566 (comprising 41,461 males and 39,105 females). The population of the southern third of the island, as well as Rao Island, are Galela speakers, while that of the northern two-thirds are Tobalo speakers.

The island in the Halmahera group of eastern Indonesia's Maluku Islands (Moluccas); it is one of Indonesia's northernmost islands. Morotai is a rugged, forested island lying to the north of Halmahera. It has an area of some 2,336.6 km (902.2 sq mi), including Rao Island which lies to the west of Morotai and forms an administrative district within the regency. It stretches 80 km (50 mi) north-south and no more than 42 km (26 mi) wide. The island's largest town is Daruba, on the island's south coast. Leo Wattimena Airport is located on the island. Almost all of Morotai's numerous villages are coastal settlements; a paved road linking those on the east coast starts from Daruba and will eventually reach Berebere, the principal town on Morotai's east coast, 68 km (42 mi) from Daruba. Between Halmahera and the islets and reefs of the west coast of Morotai is the Morotai Strait, which is about 10 km (6.2 mi) wide. The island is the location of the last known Japanese holdout, Teruo Nakamura, who surrendered in 1974, almost 30 years after the end of hostilities in 1945.

The Philippine Trench (also called the Philippine Deep, Mindanao Trench, and the Mindanao Deep) is a submarine trench to the east of the Philippines. The trench is located in the Philippine sea of the western North Pacific Ocean and continues NNW-SSE. It has a length of approximately 1,320 kilometres (820 miles) and a width of about 30 km (19 mi) from the center of the Philippine island of Luzon trending southeast to the northern Maluku island of Halmahera in Indonesia. At its deepest point, the trench reaches 10,540 meters (34,580 ft or 5,760 fathoms).

Immediately to the north of the Philippine Trench is the East Luzon Trench. They are separated, with their continuity interrupted and displaced, by Benham Plateau on the Philippine Sea Plate.

The Papuan languages are the non-Austronesian languages spoken on the western Pacific island of New Guinea, as well as neighbouring islands in Eastern Indonesia, Solomon Islands, and East Timor. It is a strictly geographical grouping, and does not imply a genetic relationship.

New Guinea is the most linguistically diverse region in the world. Besides the Austronesian languages, there arguably are some 800 languages divided into perhaps sixty small language families, with unclear relationships to each other or to any other languages, plus many language isolates. The majority of the Papuan languages are spoken on the island of New Guinea, with a number spoken in the Bismarck Archipelago, Bougainville Island and the Solomon Islands (for example, Lavukaleve. to the east, and in Halmahera, Timor and the Alor archipelago to the west. The westernmost language, Tambora in Sumbawa, is extinct. One Papuan language, Meriam, is spoken within the national borders of Australia, in the eastern Torres Strait.

North Maluku (Indonesian: Maluku Utara; Indonesian pronunciation: [maˌluku (ʔ)uˈt̪ara]) is a province of Indonesia. It covers the northern part of the Maluku Islands, bordering the Pacific Ocean to the north, the Halmahera Sea to the east, the Molucca Sea to the west, and the Seram Sea to the south. It shares maritime borders with North Sulawesi and Central Sulawesi to the west; Maluku (province) to the south; Southwest Papua to the east; and Palau to the north. The provincial capital is Sofifi, mostly part of the city of Tidore Islands on the largest island of Halmahera, while the largest city is the island city of Ternate. The population of North Maluku was 1,038,087 in the 2010 census, making it one of the least-populous provinces in Indonesia, but by the 2020 Census the population had risen to 1,282,937, and the official estimate as at mid 2024 was 1,355,620 (comprising 694,630 males and 660,990 females).

North Maluku was originally the centre of the four largest Islamic sultanates in the eastern Indonesian archipelago—Bacan, Jailolo, Tidore and Ternate—known as the Moloku Kië Raha (the Four Mountains of Maluku). Upon Europeans' arrival at the beginning of the 16th century, North Maluku became the site of competition between the Portuguese, Spanish and the Dutch to control trade. In the end, the Dutch emerged victorious, beginning three centuries of Dutch rule in the region. The Japanese invaded the region during World War II, and Ternate became the center of the Japanese rule of the Pacific region. Following Indonesian independence, the region became a part of the province of Maluku.

Gebe is an island in the Maluku Islands, Indonesia, situated between Raja Ampat and Halmahera. Administratively it is part of Central Halmahera Regency, North Maluku Province, but is physically separated from the rest of the regency by the Jailolo Strait (Selat Jailolo).

The island is the main part of a small island group which also includes the islands of Fau, Yu, Uta, and Sain. Together the group forms the Gebe Island District (Kecamatan Pulau Gebe), which covers a land area of 223.86 km, and had a population of 6,181 as at mid 2024. There are eight villages (desa) including Elfanun, Kacepi, Kapaleo, Sanafi, Sanafkacepo, Umera, and Yam on Gebe Island and Umiyal (formerly Omnial) on Yu Island.

Tidore (Indonesian: Kota Tidore Kepulauan, lit. "City of Tidore Islands") is a city, island, and archipelago in the Maluku Islands of eastern Indonesia, west of the larger island of Halmahera. Part of North Maluku Province, the city includes the island of Tidore (with three smaller outlying islands - Mare, Maitara and Filonga) together with a large part of Halmahera Island to its east. In the pre-colonial era, the Sultanate of Tidore was a major regional political and economic power, and a fierce rival of nearby Ternate, just to the north. Included within the city is the provincial capital, Sofifi, which is situated on the mainland of Halmahera (in North Oba District).