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Tópico em 'Sismologia e Vulcanismo' iniciado por luismeteo3 4 Jan 2017 às 13:41.
Alaska Volcano Erupts 36 Times in 4 Months, Triples in Size
Mais uma erupção no Sakurajima...
This is the first scientific observation of a major volcanic event at Kambalny,” said Olga Kirin, head of the Kamchatka Volcanic Eruption Response Team (KVERT.)
She added: “A strong eruption occurred 600 years ago, but there is information about the increase in activity some 250 years ago. The volcano is under our close supervision, but it is hard to say what will happen next.”
Nishinoshima island south of Tokyo erupts, lava heads to sea
THE ASAHI SHIMBUN
April 21, 2017 at 14:55 JST
A photograph taken on April 21 from an Asahi Shimbun aircraft shows Nishinoshima island, 1,000 kilometers south of Tokyo, erupting for the first time in about a year and a half. (Kotaro Ebara)
A volcanic bomb shot up about 100 meters into the sky and molten rock rolled down toward the sea on April 21 as Nishinoshima island, about 1,000 kilometers south of Tokyo, erupted for the first time in 17 months.
“Intensive volcanic activity will continue for a while. Lava will eventually reach to the sea,” said Setsuya Nakada, a volcanology professor at the University of Tokyo’s Earthquake Research Institute.
An estimated 100,000 cubic meters of lava has flowed to the surface since the eruption, according to Nakada, who observed the erupting volcano from an Asahi Shimbun aircraft.
"The volcanic activity level of Nishinoshima island is nearly the same level of that in 2014 when it was active,” he added.
Brown smoke mixed with ash was tossed out of the ground intermittently and lava poured out near the top of the island's round vent, as well as at another spot.
The Japan Meteorological Agency announced the eruption on April 20 and warned it would likely continue for some time.
The Japan Coast Guard called for vessels in the vicinity to show vigilance.
Nishinoshima island, part of the Ogasawara island chain, has been slowly but substantially expanding after a series by eruptions that occurred from 2013 to 2015.
(Ryoma Komiyama contributed to this article.)
Bogoslof Volcano in the Aleutian Islands erupted again on Sunday, sending a cloud of ash at least 35,000 feet into the air and prompting an aviation red alert.
The Alaska Volcano Observatory told the Associated Press the eruption began at 2:16 p.m. Sunday and lasted 55 minutes. After the eruption, the Aviation Color Code was raised to red, the highest level.
Ash can harm and stop jet engines. Ash from southwest Alaska volcanos is a threat airliners operating between North America and Asia when a cloud rises above 20,000 feet.
Satellite images and pilot reports indicate that the cloud from the eruption reached at least 35,000 feet, and possibly as high as 45,000 feet, the AVO said in its report. An observer on Unalaska Island reported seeing a large white-gray mushroom cloud form over Bogoslof, with ash fall out to the west.
Acabei de sentir um tremor de terra em Guimarães.
Também senti aqui em Braga
M 5.3 - 18km SE of Volcano, Hawaii