A caldera is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof, and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface. Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have occurred between 1911 and 2018, with a caldera collapse at Kīlauea, Hawaii in 2018. Volcanoes that have formed a caldera are sometimes described as "caldera volcanoes".
Gran Canaria, also Grand Canary Island, is the third-largest and second-most-populous island of the Canary Islands, an archipelago off the Atlantic coast of Northwest Africa and is part of Spain. As of 2023 the island had a population of 862,893 that constitutes approximately 40% of the population of the archipelago. Las Palmas de Gran Canaria, the capital of the island, is the biggest city of the Canary Islands and the ninth of Spain.
La Palma, also known as La isla bonita and historically San Miguel de La Palma, is the most northwesterly island of the Canary Islands, Spain, which is a Spanish autonomous community and archipelago in Macaronesia in the North Atlantic Ocean. La Palma has an area of 708.32 square kilometres (273.48 sq mi) making it the fifth largest of the eight main Canary Islands. The total population at the start of 2023 was 84,338, of which 15,522 lived in the capital, Santa Cruz de La Palma and 20,375 in Los Llanos de Aridane. Its highest mountain is the Roque de los Muchachos, at 2,426 metres (7,959 ft), being second among the peaks of the Canaries after the Teide massif on Tenerife.
Mogán is a town and a Spanish municipality in the southwestern part of the island of Gran Canaria, which is one of the three main islands making up the Province of Las Palmas in the Canary Islands, Spain. Its population is 21,782 (2013), and the area is 172.44 km2.
Teide, or Mount Teide, is a volcano on Tenerife in the Canary Islands, Spain. Its summit is the highest point in Spain and the highest point above sea level in the islands of the Atlantic. If measured from the ocean floor, its height of 7,500 m (24,600 ft) makes Teide the third-highest volcano in the world, UNESCO and NASA rank it as Earth's third-tallest volcanic structure. Teide's elevation above sea level makes Tenerife the tenth highest island in the world.
The Cumbre Vieja is an active volcanic ridge on the island of La Palma in the Canary Islands, Spain. The spine of Cumbre Vieja trends in an approximate north–south direction, comprising the southern half of La Palma, with both summit ridge and flanks pockmarked by dozens of craters and cones. The latest eruption began on 19 September 2021 in a forested area of Las Manchas locality known as Cabeza de Vaca. Voluminous lava flows quickly reached populated areas downslope, fanning out across settlements and banana plantations, destroying thousands of buildings and ultimately pouring over steep cliffs into the ocean to enlarge the island at several locations. The volcano went quiet on 13 December 2021, and on 25 December 2021, the local government declared the eruption to be over.
Agaete is a municipality of Las Palmas province, on the Canary Islands, Spain.
Roque Nublo is a volcanic rock on the island of Gran Canaria, Canary Islands, Spain. It is 80 m (262 ft) tall, and its top is 1,813 m (5,948 ft) above sea level. The Roque Nublo is the third highest point on the island of Gran Canaria, after the Morro de la Agujereada at 1,956 m (6,417 ft), and the Pico de las Nieves at 1,949 m (6,394 ft).
The GC-1 is a superhighway on the island of Gran Canaria. It links the capital Las Palmas in the north with Puerto de Mogán in the south. It is the fastest route from the north of the island to the south and vice versa with a top speed limit of 120 km/h (75 mph). It is approximately 75 km in length, and runs along the eastern and the southern coasts of this circular island and is also the second longest superhighway in the Canary Islands. The road provides easy access from the airport to the major cities and resorts. The resorts include Maspalomas and Playa del Inglés. The increase in tourism over the years has seen the GC1 route slowly being upgraded and widened to cope with extra traffic.
Puerto de Mogán is a picturesque fishing village and popular marina in the municipality of Mogán, set at the mouth of a steep-sided valley on the south-west coast of the island of Gran Canaria.
The Bandama Natural Monument is part of the Tafira Protected Landscape on the island of Gran Canaria in the Canary Islands, Spain. It is considered a point of geological interest, because of the Caldera de Bandama. This volcanic crater, which is geologically a maar rather than a caldera, reaches 569 m (1,867 ft) above sea level at the highest point on its rim, Pico de Bandama, and is about 1,000 m (3,300 ft) wide and 200 m (700 ft) deep. The crater was developed during the last heavy eruptions 2000 years ago. It is recorded as the most recent volcanic activity on Gran Canaria.
The Hospital Universitario Insular de Gran Canaria is a teaching hospital of general scope in Gran Canaria. Located in the city of Las Palmas de Gran Canaria, it was founded 13 February 1971 and consists in February 2021 of 503 beds. The first patient was hospitalized 20 September 1971.
Valerón's "monastery" is an archaeological site on the Spanish island of Grand Canary, in the municipality of Santa Maria de Guia, on Valerón's cliff. It is the largest pre-Hispanic collective granary built before Roman times and used by the island's inhabitants until the conquest of the island at the end of the 15th century.
The Guayadeque ravine, in Spanish Barranco de Guayadeque, is a ravine-type valley located on the Spanish municipalities of Ingenio and Agüimes, in the province of Las Palmas on Grand Canary island, off the coast of Morocco.
The Four Doors site, also known as Montaña Bermeja, 'Vermillion Mountain', is a complex of caves in the south of the municipality of Telde, Gran Canaria.
The El Maipés necropolis is an ancient burial site near Agaete on the Spanish island of Grand Canary, province of Las Palmas in the Canary Islands of the west coast of Africa.
The geology of the Canary Islands is dominated by volcanoes and volcanic rock. The Canary Islands are a 450 km-long (280 mi), east-west aligned archipelago of volcanic islands in the North Atlantic Ocean, 100–500 km (60–310 mi) off the coast of Northwest Africa. The islands are located on the African tectonic plate. The Canary Islands are an example of intraplate volcanism because they are located far from the edges of the African Plate.
Roque Bentayga is a rock formation on the island of Gran Canaria. It is located within the volcanic caldera of Tejeda, in the municipality of the same name, in the heart of the island. Roque Bentayga is considered an archaeological monument because it contains an "almogarén".
