Search results
Results from the WOW.Com Content Network
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file
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.
In a volcanic eruption, lava, volcanic bombs, ash, and various gases are expelled from a volcanic vent and fissure. While many eruptions only pose dangers to the immediately surrounding area, Earth 's largest eruptions can have a major regional or even global impact, with some affecting the climate and contributing to mass extinctions .
The 1980 eruption of Mount St. Helens in Washington, which ripped apart the volcano's summit, was a Plinian eruption of Volcanic Explosivity Index (VEI) 5. [ 3 ] The strongest types of eruptions, with a VEI of 8, are so-called "Ultra-Plinian" eruptions, such as the one at Lake Toba 74 thousand years ago, which put out 2800 times the material ...
Dieng Volcanic Complex: 1 Indonesia: 1979 1979 eruption of Sinila crater [28] 144 Mount Tokachi: 3 Japan: 1926 [29] [better source needed] 117 Dieng Volcanic Complex: 2 Indonesia: 1944 [30] 114 Dieng Volcanic Complex: 1 Indonesia: 1964 [30] 108 to 120 Mount Tarawera: 5 New Zealand: 1886 1886 eruption of Mount Tarawera: 106 Dubbi: 3 Eritrea ...
An eruption on 18 September 1952 killed 31 researchers and crewmen aboard the Maritime Safety Agency survey ship No.5 Kaiyo-Maru. [166] 3 Hibok-Hibok [167] Philippines 1951 500-2,000+ This eruption was a turning point for the Philippine government to establish a dedicated agency to focus on volcanoes and its activities.
Cù-Lao Ré is a volcanic field northeast of Quảng Ngãi, Vietnam. The field consists of 13 volcanic cones; four subaerial and nine submarine. Three of the subaerial cones formed the Cù-Lao Ré Island, while the fourth one formed the Cù-Lao Bai Island. [1] The islands form the Lý Sơn District of Quảng Ngãi Province.
eruption episode L 7 Phlegraean Fields: Campanian volcanic arc: Unknown 15.7 5 Mount Vesuvius Campanian volcanic arc 1.3 19.3 Green Pumice: 7 Long Island, PNG Bismarck Volcanic Arc 100 19.3 Kiau Ignimbrite 7 Zavaritzki Caldera: Simushir, Kuril Islands: 200 20 6 Rabaul: Bismarck Volcanic Arc >10 21 Kulau Ignimbrite 6 Menengai