- GLOSSARY OF VOLCANIC TERMS
An explosive volcanic eruption generally expelling less than 1km3 of material, but with an eruption column that may reach heights of up to 10-20km (Nakada, 2000, p. 945). These eruptions last on the order of seconds to minutes (Morrissey and Mastin, 2000, p. 463).\USGS PHOTO GLOSSARY OF VOLCANIC TERMSA vulcanian eruption is a type of explosive eruption that ejects new lava fragments that do not take on a rounded shape during their flight through the air. This may be because the lava is too viscous or already solidified. These moderate-sized explosive eruptions commonly eject a large proportion of volcanic ash and also breadcrust bombs and blocks. Andesitic and dacitic magmas are most often associated with vulcanian eruptions, because their high viscosity (resistance to flow) makes it difficult for the dissolved volcanic gases to escape except under extreme pressure, which leads to explosive behavior.\Photograph by J.W. Ewert on 5 October 1998Eruption column caused by a vulcanian-type explosive eruption rises above Tavurvur Volcano in Rabaul Caldera, Papua New Guinea.\Did you know?• Vulcanian eruptions are named for Vulcano, one of the Aeolian Islands north of Sicily. In fact, the word volcano itself comes from this island, home to the Greek god of fire, Hephaestus (called Vulcan by the Romans).• Other volcanoes that have recently shown vulcanian behavior include Sakurajima in Japan (ongoing) and Irazu in Costa Rica (1965).
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
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Vulcanian eruption — Vulcanian eruptions usually commence with phreatomagmatic eruptions which can be extremely noisy due the rising magma heating water in the ground. This is usually followed by the explosive throat clearing of the vent and the eruption column is… … Wikipedia
vulcanian — adjective Date: 1602 1. capitalized of or relating to Vulcan or to working in metals (as iron) 2. of or relating to a volcanic eruption in which highly viscous or solid lava is blown into fragments and dust … New Collegiate Dictionary
vulcanian — ALASKA VOLCANO OBSERVATORY GLOSSARY A type of eruption consisting of the explosive ejection of incandescent fragments of new viscous lava, usually on the form of blocks … Glossary of volcanic terms
Vulcanian — [vʌl keɪnɪən] adjective Geology relating to or denoting a type of volcanic eruption marked by periodic explosive events. Origin early 20th cent.: from Vulcano, the name of a volcano in the Lipari Islands, Italy, + ian … English new terms dictionary
Peléan eruption — Pelean eruptions are a type of volcanic eruption. They can occur when viscous magma, typically of rhyolitic or andesitic type, is involved, and share some similarities with Vulcanian eruptions. The most important characteristics of a Pelean… … Wikipedia
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