What kind of volcano is Nishinoshima?

Nishinoshima is classified as a Caldera in Japan. Its tectonic setting is Subduction zone / Crustal thickness unknown.

How is seismicity near Nishinoshima monitored here?

Earthquakes within 50 km of the crater are aggregated from 18 seismic networks and checked against a swarm rule that compares the current rate with this volcano's own 30-day background. Ash advisories come from the VAAC centres that are connected.

Volcano Dossier•GVP #284096

27.24°N, 140.88°E

Erupted since 2000

Japan→

Volcano Nishinoshima

A remote island about 1,000 km south of Tokyo that has been building itself out of lava since 2013, swallowing the old island and growing to more than ten times its original area. Scientists study it as a rare case of new land forming from scratch; in 2020 its ash columns rose several kilometres.

Last eruption

2023

Erupted since 2000

Summit

0.2 km

Caldera · Andesite / Basaltic Andesite

Activity

Normal Baseline

0 events (1.0x rate)

Interactive Volcano & Seismicity Map

Seismicity within 50 km radius, active VAAC ash plumes, and tectonic plate boundaries.

Recent seismicity within 50 km

0 events in the last 12 h within 25 km of the crater.

No catalogued earthquakes within 50 km in the last 90 days.

Geological & Tectonic Profile

Caldera

Nishinoshima is an active Caldera formed in an active Subduction zone / Crustal thickness unknown. Dominant lithology: Andesite / Basaltic Andesite.

Edifice TypeCaldera

Major rockAndesite / Basaltic Andesite

TectonicsSubduction zone

Volcanic ArcOgasawara Volcanic Arc

Volcano Dossier

VN #284096

Official catalogue parameters, coordinates, elevation and geotectonic classification.

CountryJapan

Crater Coordinates27.244°, 140.880°

Summit0.2 km

SubregionOgasawara Volcanic Arc

Catalog SourceSmithsonian GVP (#284096)

Authoritative Monitoring Infrastructure

All 18 Networks & VAAC →

Seismic ObservatoryJMA

Japan Meteorological Agency (Volcano Observation)

Official Portal

ICAO Aviation Ash Center

Tokyo VAAC (JMA)

Tokyo, Japan

VAAC Advisory Desk

Swarm telemetry correlated across 18 networks against a 30-day baseline.Read Science & Physics →

Regional Seismic Profile

Japan

Explore live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for Japan.

Earthquakes in Japan →

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

The most recent eruption of Nishinoshima recorded by the Smithsonian Global Volcanism Program was in 2023.

Catalogue: Smithsonian Institution, Global Volcanism Program.Smithsonian GVP profile