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Post Info TOPIC: Underwater eruption


L

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Fukutoku-Okanoba
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This true-colour image of volcanic activity at Fukutoku-Okanoba was taken by the Advanced Land Imager (ALI) on Earth Observing-1 (EO-1) satellite on the 11th February, 2010.
Volcanic activity has discoloured the water west of the summit.

fukutoku_ali_2010042b.jpg
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Credit Nasa

Latitude: 2417'25.93"N, Longitude: 14128'45.48"E

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L

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RE: Underwater eruption
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Video has been released of an underwater volcano exploding smoke off the coast of Japan.
Coastguards filmed the eruption, recording that the smoke reached 100 metres in the air, turning the surrounding ocean a yellow-green colour.

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L

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An underwater volcano erupted Wednesday morning about 5 kilometers north-northwest of Iwo Jima (Iwo To), sending a plume of white ash and steam into the air.
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L

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The Fukutokuoka-no-ba volcano is located on the southern part of Izu-Ogasawara arc, approximately 1300km south of Tokyo. It is an active submarine volcano, which is characterised by large caldera with several central knolls and a subordinated volcanic island on caldera rim, Minami-Io Sima Island.
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Latitude: 2416'47.67"N, Longitude: 14129'6.15"E

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L

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There are reports that an undersea eruption has created a new island near Iwo Jima.

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Japanese coast guard officials said Sunday they believe an underwater volcanic eruption has caused a 3,300-foot high column of steam to rise from the Pacific Ocean near Iwo Jima.



The vapour was reported Saturday after Japanese troops stationed on the small island observed the massive, cloudy plume rise from the sea about 30 miles southeast of the island, said Maritime Self-Defence Forces Hiroshi Shirai.
Defence officials who flew over the area in a helicopter said the surface of the water appeared red where the column was reported, which could indicate underwater volcanic activity.
On Sunday, coast guard aircraft crews flew over the site and returned with a video image confirming the earlier reports, said Shigeyuki Sato, a spokesman for the service.
The survey crew also found greyish mud rising up from the bottom of the ocean, but it was not immediately known whether any volcanic gases are being released.

The location is known as Fukutokuoka-no-ba, an undersea volcano which last erupted in 1986 for three days.
The coast guard aircraft ended the day's survey after less than two hours due to safety concerns, but plan to return to the site as early as Monday for further monitoring.
The service issued an international warning for vessels, urging them to stay away from the waters.

Japan's Meteorological Agency said there was no danger of tsunamis, sometimes caused by undersea seismic activity.
Iwo Jima is about 700 miles southeast of Tokyo.

source


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