Global Volcanism Program | Volcanic Activity Report on Nishinoshima (Japan)

Volcanic Activity Report on Nishinoshima (Japan) — 5 July-11 July 2023

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 5 July-11 July 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 July-11 July 2023. Smithsonian Institution and US Geological Survey. https://volcano.si.edu/showreport.cfm?gvpvar=GVP.WVAR20230705-284096

Nishinoshima

Japan

All times are local (unless otherwise noted)

JMA reported that at around 1300 on 9 July an eruption plume from Nishinoshima rose 1.6 km above the crater and drifted N. Satellite images acquired at 1420 and 2020 on 9 July and 0220 on 10 July showed continuing emissions rising 1.3-1.6 km and drifting NE and N.

Source: Japan Meteorological Agency (JMA)

Geological Summary. The small island of Nishinoshima was enlarged when several new islands coalesced during an eruption in 1973-74. Multiple eruptions between 2013 and 2023 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.