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2. Mount Aniakchak - Wikipedia

   en.wikipedia.org/wiki/Mount_Aniakchak

   Mount Aniakchak (Russian: Аниакчак) is a volcano on the western Alaska Peninsula. Part of the Aleutian Volcanic Arc , it was formed by the subduction of the oceanic Pacific Plate under the North American Plate .

3. Mount Mazama - Wikipedia

   en.wikipedia.org/wiki/Mount_Mazama

   Its collapse, due to the eruption of magma emptying the underlying magma chamber, formed a caldera that holds Crater Lake (Giiwas in the Native American language Klamath). [6] Mount Mazama originally had an elevation of 12,000 feet (3,700 m), but following its climactic eruption this was reduced to 8,157 feet (2,486 m).

4. Lake Toba - Wikipedia

   en.wikipedia.org/wiki/Lake_Toba

   Lake Toba (Indonesian: Danau Toba, Toba Batak: ᯖᯀᯬ ᯖᯬᯅ; romanized: Tao Toba) is a large natural lake in North Sumatra, Indonesia, occupying the caldera of the Toba supervolcano. The lake is located in the middle of the northern part of the island of Sumatra, with a surface elevation of about 900 metres (2,953 ft), the lake stretches ...

5. Mount Ruapehu - Wikipedia

   en.wikipedia.org/wiki/Mount_Ruapehu

   Mount Ruapehu (Māori: [ˈɾʉaˌpɛhʉ]; colloquially / ˈ r uː ə ˌ p eɪ h uː /) is an active stratovolcano at the southern end of the Taupō Volcanic Zone and North Island volcanic plateau in New Zealand. It is 23 km (14 mi) northeast of Ohakune and 23 km (14 mi) southwest of the southern shore of Lake Taupō, within the Tongariro ...

6. Magmatism - Wikipedia

   en.wikipedia.org/wiki/Magmatism

   Magmatism. Geological map showing the Gangdese batholith, which is a product of magmatic activity about 100 million years ago. Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. It does so through magmatic activity or igneous activity, the production ...

7. Phreatic eruption - Wikipedia

   en.wikipedia.org/wiki/Phreatic_eruption

   Phreatic eruption at the summit of Mount St. Helens, Washington, in the spring of 1980. A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption, [1] occurs when magma heats ground water or surface water. The extreme temperature of the magma (anywhere from 500 to 1,170 °C (930 to 2,100 °F)) causes ...