The islands are located in the eastern Pacific Ocean, 973 km (525 nmi; 605 mi) off the west coast of South America. The closest land mass is the mainland of Ecuador to the east (the country to which they belong), to the north is Cocos Island at 720 km (389 nmi; 447 mi) and to the south is Easter Island and San Felix Island at 3,200 km (1,730 nmi; 1,990 mi).
The islands are found at the coordinates 1°40'N1°36'S, 89°16'92°01'W. Straddling the equator, islands in the chain are located in both the northern and southern hemisphere, with Volcán Wolf and Volcán Ecuador on Isla Isabela being directly on the equator. Española, the southernmost island, and Darwin, the northernmost island, are spread out over a distance of 220 km (137 mi). The International Hydrographic Organization (IHO) considers them wholly within the South Pacific Ocean, however. The Galápagos Archipelago consists of 7,880 km2 (3,040 sq mi) of land spread over 45,000 km2 (17,000 sq mi) of ocean. The largest of the islands, Isabela, measures 4,640 km2 (1,790 sq mi) and makes up half of the total land area of the Galápagos. Volcán Wolf on Isabela is the highest point, with an elevation of 1,707 m (5,600 ft) above sea level.
The group consists of 15 main islands, 3 smaller islands, and 107 rocks and islets. The islands are located at the Galapagos Triple Junction. The archipelago is located on the Nazca Plate (a tectonic plate), which is moving east/southeast, diving under the South American Plate at a rate of about 2.5 inches per year. It is also atop the Galapagos hotspot, a place where the Earth's crust is being melted from below by a mantle plume, creating volcanoes. The oldest island is thought to have formed between 5 million and 10 million years ago. The youngest islands, Isabela and Fernandina, are still being formed, with the most recent volcanic eruption in April 2009, where lava from the volcanic island Fernandina started flowing both towards the island's shoreline and into the centre caldera.

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