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Japan · Caldera

Kita-Bayonnaise

Type
Caldera
Elevation
360m (submarine)
Last eruption
Unknown
The submarine topography of the 6-7 km Myojin Knoll caldera is seen in this SeaBeam image viewed from the SW. The white line marks the E-W track of the survey vessel. A voluminous deposit of coarse pumice from the caldera-forming eruption mantles the caldera rim and its outer flanks. A post-caldera lava dome rises 250 m above the caldera floor.
The submarine topography of the 6-7 km Myojin Knoll caldera is seen in this SeaBeam image viewed from the SW. The white line marks the E-W track of the survey vessel. A voluminous deposit of coarse pumice from the caldera-forming eruption mantles the caldera rim and its outer flanks. A post-caldera lava dome rises 250 m above the caldera floor. · Photo: Image by Fumitoshi Murakami (Geological Survey of Japan, courtesy of Richard Fiske, Smithsonian Institution).
Type
Caldera
Country
Japan
Region
Northwestern Pacific / Izu Volcanic Arc
Elevation
360m (submarine)
Coordinates
32.100, 139.850
Last eruption
Unknown
Tectonic setting
Subduction zone / Oceanic crust (< 15 km)
Landform
Caldera
Major rock type
Rhyolite

Geological summary

The large submarine Kita-Bayonnaise (North Bayonnaise) submarine caldera, also known as Myojin Knoll, lies between the Aogashima and Myojinsho (also called Beyonesu Rocks) calderas about 300 km SSE of the Izu Peninsula.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

Eruption history

Glossary

Detailed timeline

No eruption records available.

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.