Report on Nishinoshima (Japan) — 5 April-11 April 2023
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 5 April-11 April 2023
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2023. Report on Nishinoshima (Japan) (Sennert, S, ed.). Weekly Volcanic Activity Report, 5 April-11 April 2023. Smithsonian Institution and US Geological Survey.
Nishinoshima
Japan
27.247°N, 140.874°E; summit elev. 100 m
All times are local (unless otherwise noted)
JMA reported that at 1050 and 1420 on 11 April ash plumes from Nishinoshima rose 1.9 km above the crater rim and drifted NW and W [Correction: NW and N.]
Geological Summary. The small island of Nishinoshima was enlarged when several new islands coalesced during an eruption in 1973-74. Multiple eruptions that began in 2013 completely covered the previous exposed surface and continued to enlarge the island. The island is the summit of a massive submarine volcano that has prominent peaks to the S, W, and NE. The summit of the southern cone rises to within 214 m of the ocean surface 9 km SSE.
