Japan heeft er een eilandje bij na vulkaanuitbarsting

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Japanese volcano grows 11 times it's size

PACIFIC OCEAN, JAPAN (CNN/AVN/NHK) — A remote Japanese island in the Pacific Ocean has grown more than 11 times in size since an underwater eruption started about 15 months ago. The eruption started in November 2013 near the island Nishinoshima, which is about 621 miles away from Tokyo — but falls within its metropolitan area and created a separate island. The eruption continued, and lava connected the two islands.

On Monday, personnel aboard a Coast Guard patrol aircraft said a crater was spewing out volcanic rock five or six times per minute, sending smoke about 4,000 feet high. Infrared footage taken by a Coast Guard vessel showed molten lava flowing from the crater.

Coast Guard officials said the size of the island is now about 1.5 square miles. It measures 1,950 meters east to west and 1,800 meters north to south.

The officials said they hope to survey seabed formations using remote-controlled submersibles. They also called on ships to navigate areas near the island with caution.

Nishinoshima in Japan: Volcanic island grows more than 11-fold

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Remote Japanese island keeps growing
A NHK video shows how a remote island volcano in Japan is rapidly growing by spewing lava in multiple layers.

A drone equipped with a 4K ultra high-definition camera was flown over Nishinoshima Island by NHK.

The island in the Ogasawara chain, about 1,000 kilometers south of Tokyo, began to expand after an undersea eruption started near it in 2013.

Nishinoshima has now grown more than 12-fold.

The area within a four-kilometer radius of the island’s center is a no-entry zone due to the eruption.

But the unmanned helicopter made it possible to film the volcano from the comparatively low altitude of about 2,300 meters.

The video shows a crater in the island’s center continuously spewing smoke in a spiral. Rocks up to three meters across are being thrown into the air.

Dark lava flowing from the mountainside produces steam as it hits the sea water.

Footage taken at night gives an even clearer image of the lava flows. The flowing lava shines brightly and looks like a river streaming from the mountain. Some of the lava went underground before reappearing near the coast.

Tokyo Institute of Technology Professor Kenji Nogami analyzed the footage. He says new lava flows were formed on top of old ones that hardened after cooling. This apparently helped the land to become thicker.

The Japan Coast Guard says Nishinoshima Island is about two kilometers wide north to south as well as east to west and has a total surface area of 2.72 square kilometers.

Japan: Volcano expands size of remote island