archipelago composed of nine major islands, in the North Atlantic Ocean; they lie roughly 1,000 miles (1,600 km) west of Portugal and are an autonomous part of that country. The islands are divided into three widely separated groups: the eastern group, consisting of São Miguel, Santa Maria, and the Formigas islets; the central, of Faial, Pico, São Jorge, Terceira, and Graciosa; and the northwestern, of Flores and Corvo. The capital is Ponta Delgada on São Miguel.
The nearest continental land is Cape Roca, Portugal, which lies 875 miles (1,400 km) east of Santa Maria. Thus, the Azores are farther from mainland Europe than any other eastern Atlantic islands and, rising from the ocean, are in effect a major mountain range, the Mid-Atlantic Ridge. The islands rise steeply from shores lined with rock and pebble debris (scree, or talus) to heights reaching 7,713 feet (2,351 metres) on Pico. Their unstable geologic nature is indicated by numerous earthquakes and volcanic eruptions. In 1522 the town of Vila Franca do Campo, then capital of São Miguel, was buried during a massive convulsion, and as recently as 1957–58 the Capelinhos eruption enlarged Faial Island. Indeed, many island houses are constructed of building blocks made of basalt. Deep craters (calderas) as well as lakes are a dramatic feature of the islands. On São Miguel Island the volcanic heat on the shores of Lake Furnas, a popular picnic spot, is sufficient for cooking.
The Azores have a subtropical climate with high humidity. An abundant flora of European and Mediterranean origins is found, and mixed forests still cover many of the islands' hillsides. Intensive agriculture produces cereals (wheat and corn [maize]), vegetables, and fruit (including pineapples and wine grapes). A high-quality cured cheese is made at São Jorge. Among the other principal products of the Azores are various dairy products, fish, pineapples, tea, and wine. A free trade zone has been set up on Santa Maria Island.
The scenic beauty of the islands draws visitors in increasing numbers. One of the prime tourist activities is whale watching (whaling ceased in 1984). Some 20 species of cetaceans can viewed.
The inhabitants of the Azores are mostly of Portuguese origin and predominantly Roman Catholic. A high density of population and limited economic opportunities provoked extensive emigration, mainly to the United States and Canada, from the end of the 19th century well into the 20th century and has not entirely ceased. The islands' isolation has diminished and communications considerably improved. Every island has an airport or airstrip. The Azores' principal seaports are Angra do Heroísmo (or Angra), Ponta Delgada, and Horta. Lajes and Santa Maria became important air bases and centres of communication between the United States and Europe during World War II, and since 1951, by agreement with Portugal, the United States has maintained a NATO air base on Lajes. Before the development of weather satellites, meteorological data compiled and transmitted from the Azores were essential to European weather forecasting. Area 897 square miles (2,322 square km). Pop. (2005 est.) 242,241.
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