Environment

New eruptive activity at Nishinoshima volcano, Japan


A new eruptive activity is taking place at Japanese Nishinoshima volcano in Ogasawara (Bonin Islands)

The Japan Meteorological Agency reported a bright spot emerging in Himawari-8 imagery it Nishinoshima on July 12. In addition, a brown smoke was seen rising from near the crater around 12:24 JST, July 12.

According to JMA, the surface temperature at Nishinoshima remains unchanged and it seems that lava has not reached the surface.

Image credit: Japanese Coast Guard

Although this volcano is far from the mainland, the agency warned that volcanic material could reach distances of around 500 m (1 640 feet) from the crater and advised caution.


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The last known eruption of this volcano took place in August 2017 (VEI 2).

Geological summary

The small island of Nishinoshima was enlarged when several new islands coalesced during an eruption in 1973-74. Another eruption that began offshore in 2013 completely covered the previously exposed surface and enlarged the island again. Water discoloration has been observed on several occasions since.

The island is the summit of a massive submarine volcano that has prominent satellitic peaks to the S, W, and NE. The summit of the southern cone rises to within 214 m (702 feet) of the sea surface 9 km (5.6 miles) SSE. (GVP)

Featured image: Nishinoshima volcano on July 12, 2018. Credit: Japanese Coast Guard



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