NishinoShima, Japon : A natural laboratory in constant growth.

NishinoShima, Japon : A natural laboratory in constant growth.

Nishinoshima. A natural laboratory in constant growth

In addition to continuing its growth with the fear that a landslide produce a tsunami, the new island has become a unique opportunity for scientists. Now they can see first hand how life begins to colonize the wilderness. This new island is located 1000 km from Tokyo in the Pacific Ocean, and is part of the Ogasawara Islands, known for the variety and richness of their ecosystem. « We biologists are very focused on this island because we see in it the starting point of the process of evolution, » says Naoki Kachi, a professor at Tokyo Metropolitan University.

When the volcanic eruption on the island will calm down « what is likely to occur will be the arrival of plants brought by ocean currents, said Kachi. The birds, who could use the rocks as temporary resting places, leave feathers, faeces and vomiting that fertilize the soil for the seeds carried by the wind. According Kachi, the island is a blank canvas that has to be treated with respect, avoiding the arrival of foreign invaders that could affect the course of nature.

The Coast Guard directed by Professor of the Tokyo Institute of Technology, Kenji Nogami, conducted an analysis of the marine environment surrounding the island. Early reports indicate that the water around the island has a pH between 7.9 and 8 points, slightly lower than normal sea water, which would indicate the presence of volcanic gases dissolved in water. This indicates that volcanic activity continues and is likely to continue growing in the coming months.

Since the eruption continued at the level of the pyroclastic cone with white gas plumes emissions, with a height of 300-600 meters. Sometimes this plume is gray by ash. On May 20, this emission came extend 20 km to the northeast. That day a precipitation of sulfur was also observed in the crater. Lava continues to flow in a fan shape and extends mainly in a south-easterly direction, forming new land. In contact with water, clouds of steam are produced.
It also continues to observe discoloration of yellow-green waters between 200-400 meters, and even up to 1000 meters from the coast.

In addition, on May 20 this discoloration was observed at 10 kilometers off the southwest coast, so a navigational warning was issued.

Measurements

– May 20
2000m East-West (March 25: 2000 m)
North-South: 1900 m (25 March 1800)
New Earth: 2.57 km2. March 27: 2.45 km2. All Nishinoshima: 2.58 km2.

– June 18
East-West 2000 m (2000 m May 20)
North-South: 2100 m (1900 m May 20)

New Earth: 2,70 km2. The total area of the island on June 18 is 2.71 km2.

04/07/2015. NishinoShima, Japon :

Source : kaiho. mlit .go.jp

Photos : Japan Coast Guard.

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