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    Iwatesan

    Volcanic complex · 2,038 m · Japan

    Iwatesan
    Photo: yisris · CC BY-SA 2.0 · Wikimedia Commons

    Iwatesan sits on the Okhotsk Plate, in a subduction zone. 29 eruptions are known since the end of the last ice age, the most recent in 1919.

    Elevation
    2,038 m
    Type
    Volcanic complex
    Tectonic Setting
    Subduction zone, continental crust
    Dominant Rock
    Basalt / Picro-Basalt
    Plate
    Okhotsk Plate
    Country
    Japan
    Last Eruption
    1919
    Known Eruptions (Holocene)
    29
    Max. Explosivity (VEI)
    3

    Nearby Cities

    Cities of more than 20,000 people within 100 km. At least 295,000 people live in those within 30 km.

    Eruption Timeline

    Each bar is an eruption; its height shows its explosivity (VEI 0 to 8).

    6,450 BCE6,300 BCE5,650 BCE4,900 BCE4,850 BCE4,450 BCE · VEI 04,350 BCE3,750 BCE3,250 BCE · VEI 03,050 BCE2,950 BCE2,700 BCE2,050 BCE2,000 BCE1,650 BCE1,500 BCE1,250 BCE · VEI 31,150 BCE450 BCE350 BCE1501300 · VEI 314501686 · VEI 31687 · VEI 21689 · VEI 21732 · VEI 21919 · VEI 11934 VEI 2VEI 4VEI 6 6,450 BCE1500180019002000

    Eruption Uncertain Date

    Sources : Global Volcanism Program, 2026. Volcanoes of the World (v. 5.4.0; 7 Aug 2026), Smithsonian Institution, doi:10.5479/si.GVP.VOTW5-2026.5.4 (volcano.si.edu) · NOAA NCEI · USGS · Wikidata