Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Myokosan
Myoko is a steep-sided stratovolcano in west-central Honshu that overlooks the popular resort of Lake Nojiri. This springtime view from Madarao, SE of Myoko, shows a 3-km-wide caldera breached to the east that is partially filled by a flat-topped lava dome forming the volcano's high point. Several episodes of edifice collapse at Myoko have produced major debris avalanches that traveled to the east and NE. The latest dated eruptions of Myoko occurred during the mid Holocene. No historical eruptions are known, but constant solfataric activity occurs. Photo by Yukio Hayakawa, 1998 (Gunma University).
Volcano Number:283100
Volcano Name:Myokosan
Country:Japan
Volcano Type:Stratovolcano
Last Eruption:750 BCE
Elevation:2454m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:1563
Pop. within 10km:11033
Pop. within 30km:561142
Pop. within 100km:4118863
Latitude:36.891
Longitude:138.114



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
283100 Myokosan 17552 Confirmed Eruption 5 ? Akakura Ash; AK-a tephra Radiocarbon (corrected) -4750
283100 Myokosan 17553 Confirmed Eruption Tephrochronology -4300
283100 Myokosan 17554 Confirmed Eruption Tephrochronology -4000
283100 Myokosan 17555 Confirmed Eruption Tephrochronology -3700
283100 Myokosan 17556 Confirmed Eruption Tephrochronology -3450
283100 Myokosan 17557 Confirmed Eruption Tephrochronology -2900
283100 Myokosan 17558 Confirmed Eruption 4 Otagirigawa Ash; OT-a tephra Radiocarbon (corrected) -2750
283100 Myokosan 17559 Confirmed Eruption Tephrochronology -2100
283100 Myokosan 17667 Confirmed Eruption Tephrochronology -1200
283100 Myokosan 17668 Confirmed Eruption Tephrochronology -750
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
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Data from the SESAR Database
Sorry. No data exist for this volcano in the SESAR database.


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.