Nishinoshima, Japon : Presence of explosive eruption.

Nishinoshima, Japon : Presence of explosive eruption.

The volcanic island continues to lose in size, 2.67 km² in September to 2.63 km² to 17 November.

Situation of the eruption
Presence of explosive eruption with a frequency of one hour and intense infrasound , with explosions in the crater of pyroclastic cone. Ash plumes were released by the eruption, amounting to about 500 ~ 1000m
The dispersion of emissions reached the sea and has made so far towards the southwest of Nishinoshima.
An area at the bottom of the slope north of the pyroclastic cone formed two depressions.
The Hornito with fumaroles , who was north , has completely disappeared.
A lava flow was formed in the southern slope of the pyroclastic cone (see picture)

In addition, there is no lava flow that reaches the coast, significant changes of the coast plotting were observed.
The coast of Nishinoshima surrounded by a pale yellow-green discoloration of the water over a width of about 200 ~ 300m.
The volcanic activity will continue his pursuit on the island of Nishinoshima.
It was recalled because there is a risk of the eruption of Nishinoshima affecting the surrounding waters (from the island center with a radius of 4 km), a necessary vigilance warning for continuing navigation of the ships near the island.

November 21, 2015. Nishinoshima, Japon :

Source : kaiho.mlit.go.jp, Sherine France.

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