Eruption of Yokodake

When

12th century

Kind

Volcanic eruption

Coordinates

36.09° N, 138.32° E

Date uncertainty

± 100 years

Vent

Yokodake

Unit

NYk-1 tephra

Dated by

Isotopic: 14C (calibrated)

Volcano number

283031

Eruption number

17388

Lava dome in Honshū, Japan

Mount Yoko also known as Mount Kita Yoko, is an active lava dome located in the Northern Yatsugatake Volcanic Group of the Yatsugatake Mountains, Honshū, Japan. Mount Yoko has shown the most recent activity and is now considered an active volcano. It last erupted approximately 800 years ago. The eruption consisted of ash with a lava flow of some 3 million cubic meters.

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• Smithsonian GVP Volcanoes of the World: Holocene eruptionsGlobal Volcanism Program, Smithsonian InstitutionSmithsonian terms of use: personal, educational and non-commercial use, with creditGlobal Volcanism Program, Smithsonian Institution: Volcanoes of the World v5.3, https://doi.org/10.5479/si.GVP.VOTW5-2025.5.3Source page