Report on Nishinoshima (Japan) — 18 November-24 November 2015
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 18 November-24 November 2015
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2015. Report on Nishinoshima (Japan). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 18 November-24 November 2015. Smithsonian Institution and US Geological Survey.
27.247°N, 140.874°E; summit elev. 25 m
All times are local (unless otherwise noted)
According to a news article from 22 November, recent footage (from the previous week) of Nishinoshima showed that the eruption was ongoing with explosion from the central crater and lava flows. The new island was 1.9 km E to W, 1.95 km N to S, and 100 m high, based on Coast Guard reports.
Geologic Background. 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 previous 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 of the sea surface 9 km SSE.
Source: Japan Today