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Volcano Calendar 2019
: We're proud to present our 2019 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.
: "One of the most eye-catching guides to the world’s volcanoes ever published.
: Our professional team of volcanologists and photographers offers unique travel opportunities: volcano expeditions, photo tours, and relaxed walking & study tours.
The Volcano Adventure Guide
: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
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Illustrated Volcano Glossary
Lava fountain more than 1,000 ft tall from Mauna Ulu, a vent of Kilauea Volcano in Hawaii, on 22 Aug 1969, a spectacular example of a Hawaiian eruption. Photo by D.A. Swanson, HVO / USGS
During a Hawaiian eruption, very fluid, basaltic lava is erupted from the vent as lava fountains and forms lava flows. The fountains are driven by the expanding gasses that were contained in the magma and leave the vent as a jet. Such eruptions are common for hot-spot volcanoes such as Kilauea on Hawai'i.
The lava fountains can reach heights of several hundreds meters, sometimes even more than 1 km. They can last for hours or even days and often occur from fissure vents to form so-called curtains of fire.
The lava spatter that falls back from the fountain can form lava flows if it is still fluid enough, or build up welded spatter ramparts and cinder cones around the vent. Along with the lava fountains, a portion of already degassed magma leaves the vent directly as lava flows, and lava effusion without fountaining can continue after the fountaining phase for a long time (at Pu'u 'O'o, lava effusion essentially has been continuing for more than 30 years now).
Because the lava during Hawaiian eruptions is very fluid, it can form rivers of lava of several kilometers length.
Hawaiian eruptions have their names from Kilauea and Mauna Loa volcanoes on the Big Island of Hawaii, which have produced spectacular lava fountains, but they also occur on other volcanoes, most notably on Piton de la Fournaise volcano on La Réunion island (Indian Ocean, France) and on Etna and Vesuvius volcanoes, both in Italy.
Some of the most spectacular Hawaiian eruptions on Hawaii were the the 1959 eruption of the Kilauea Iki Crater at the summit of Kilauea, and the 1969-1974 Mauna Ulu eruption and 1983-1986 Pu'u 'O'o eruptions both on the eastern rift zone of Kilauea.
More on VolcanoDiscovery:
Volcano Tours on Hawai'i
: The Hawaiian Islands are not only home to the most active volcanoes in the world, Kilauea and Mauna Loa on the Big Island, but also boast a unique natural environment. Born by volcanic activity of a very active hot spot in the middle of the Pacific Plate, they are a showcase of natural history.
Dukono volcano photos
: Dukono on Halmahera in Indonesia has been in permanent activity for years, often producing ash plumes that drift around the northern part of the island and have become normality.
Walking & Study tours
: VolcanoDiscovery's signature tours for small groups: Discover volcanoes and volcanic areas from close with an expert in their field! These tours have a broad mix of activities and interests from photography, walking, study travel, nature & culture.
Volcano Calendar 2016
: We're proud to present our new volcano calendar 2016: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.