Overall Green alert Volcanic eruption for Suwanosejima
in Japan

Event summary

Volcanic eruption Suwanosejima is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Name: Suwanosejima
Lat/Lon: 29.638 , 129.714
Event Date: 24 Jun 2021 00:00 UTC
Exposed Population 30km: About 300 people within 30km
Exposed Population 100km: About 600 people within 100km
Max Volc. Explosivity Index VEI: 4
Population exposure index: 2
Inserted at: 24 Jun 2021 05:39 UTC


For more info on GDACS alert score click here.

Historical Timeline

Volcano Timeline

IDGDACS alert colorDateEruption DetailsSource
1 24 Jun 2021 00:00 Exploded at 2021-06-24 21:07 UTC flight level 80 (2400m) extend north. TOKYO

Exposed population

The eruption happened in Japan , Region of Kyushu (population 13,296,000) . The nearest places are Motomura, Akusekishima, Nakanoshima, and Kuchinoshima.

Radius Population
100 km <1000 people
75 km <1000 people
50 km <1000 people
30 km <1000 people
20 km <1000 people
10 km <1000 people
5 km <1000 people
2 km no people

Detailed event map. European Union, 2024. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Affected Provinces

Region Province Country Population
Kyushu Japan 13.3 million people
Okinawa Japan 1.2 million people
Shikoku Japan 4.3 million people
Chugoku Japan 8 million people

Affected populated places

Name Region Province Country City class Population Distance
Motomura Kagoshima Japan Village - 5 km
Akusekishima Kagoshima Japan Village - 25 km
Nakanoshima Kagoshima Japan Village - 26 km
Kuchinoshima Kagoshima Japan Village - 43 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.



Name LOCODE Country Distance
Tokara Island Japan 28 km


Nuclear plants

Tsunami impact

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Tsunami affected locations

Initial conditions

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.