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In volcanology, an explosive eruption is a volcanic eruption of the most violent type. A notable example is the 1980 eruption of Mount St. Helens . Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent.
Volcanoes known to have Surtseyan activity include: Surtsey, Iceland. The volcano built itself up from depth and emerged above the Atlantic Ocean off the coast of Iceland in 1963. Initial hydrovolcanics were highly explosive, but as the volcano grew, rising lava interacted less with water and more with air, until finally Surtseyan activity ...
Violent Strombolian eruptions are more explosive in nature than their regular counterparts (up to VEI 3), [5] and may produce sustained lava fountains, [4] long distance lava flows, [6] eruption columns several kilometres in height, [2] and heavy ash fallout. [7] Rarely, Violent Strombolian eruptions may transition into Subplinian eruptions. [8]
Plumes of ash filled the sky as the volcano rumbled to life for the first time in 19 years. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways ...
The beautiful and terrible majesty of our natural world was on full display Saturday.A massive undersea volcano near the Pacific nation of Tonga erupted with such force that it prompted near ...
Volcanic eruptions can be highly explosive. Some volcanoes have undergone catastrophic eruptions, killing large numbers of humans or other life forms. This list documents volcanic eruptions by human death toll.
A U.S. Geological Survey report from Dec. 2 says Yellowstone’s volcano alert level was “normal.” Yellowstone has had three “large explosions” in about 2.1 million years .
The most famous and destructive historical eruptions are mainly of this type. An eruptive phase can consist of a single eruption, or a sequence of several eruptions spread over several days, weeks or months. Explosive eruptions usually involve thick, highly viscous, silicic or felsic magma, high in volatiles like water vapor and carbon dioxide.