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Mount Nasu

Nasudake

Stratovolcano · Japan · 1915m

A line of hikers at the lower left walk along a trail below the summit of Chausudake, the active cone of the Nasudake volcanic complex. This volcano group consists of a N-S-trending cluster of cones and lava domes at the N end of the Kanto Plain. Chausudake is a young cone that formed about 16,000 years ago. Six eruptions took place in 1408-1410 CE, when the youngest summit lava dome formed; additional smaller phreatic eruptions have occurred since then.
A line of hikers at the lower left walk along a trail below the summit of Chausudake, the active cone of the Nasudake volcanic complex. This volcano group consists of a N-S-trending cluster of cones and lava domes at the N end of the Kanto Plain. Chausudake is a young cone that formed about 16,000 years ago. Six eruptions took place in 1408-1410 CE, when the youngest summit lava dome formed; additional smaller phreatic eruptions have occurred since then. · Photo: Photo by Yukio Hayakawa, 1994 (Gunma University). · Wikimedia Commons
Type
Stratovolcano
Country
Japan
Region
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Elevation
1915m
Coordinates
37.125, 139.963
Last eruption
1963
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The Nasudake volcanic group consists of a N-S-trending cluster of stratovolcanoes and lava domes at the north end of the Kanto Plain. Volcanic activity dates back about 500,000 years. Growth of three large basaltic-to-dacitic stratovolcanoes, each lasting about 200,000 years, was followed by construction of three smaller andesitic stratovolcanoes, Asahidake, Futamatayama, and Chausudake. Activity during the last 55,000 years included the collapse of Asahidake volcano about 30-40,000 years ago, producing the massive Ofujisan debris-avalanche deposit, which covers a broad area SE of the volcano. The youngest volcano, Chausudake, began forming about 16,000 years ago. Six magmatic eruptions took place since then, the latest in 1408-1410 CE, when the Chausudake summit lava dome formed. These eruptions produced block-and-ash flows and concluded with the extrusion of lava flows. Smaller phreatic eruptions have occurred every few hundred years during the past 5,000 years.

From Wikipedia

Mount Nasu is a group of complex volcanoes located in the northeast part of Nikkō National Park, Japan. The tallest peak is Sanbonyari Peak at a height of 1,916.9 m (6,289 ft). Mount Nasu is one of the 100 Famous Japanese Mountains.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
8550 BCE~8200 BCE · 1 eruptions · max VEI 28200 BCE~7849 BCE · 1 eruptions · max VEI 36097 BCE~5747 BCE · 1 eruptions · max VEI 25747 BCE~5396 BCE · 1 eruptions · max VEI 34695 BCE~4345 BCE · 1 eruptions · max VEI 22242 BCE~1892 BCE · 1 eruptions · max VEI 21541 BCE~1191 BCE · 1 eruptions · max VEI 2840 BCE~490 BCE · 1 eruptions · max VEI 3490 BCE~140 BCE · 1 eruptions · max VEI 2211~561 · 2 eruptions · max VEI 31262~1613 · 4 eruptions · max VEI 31613~1963 · 6 eruptions · max VEI 18550 BCE6097 BCE3293 BCE840 BCE1613

Detailed timeline

  1. 1963VEI 1Geological estimate
    1963-07-10 – 1963-07-11
    Chausu-dake
  2. 1963VEI 1Observed
    1963-11-20 – 1963-11-21
    Chausu-dake (west side)
  3. 1960VEI 1Observed
    1960-10-10 – Ongoing
    Chausu-dake (50 m north of 1953 vent)
  4. 1953VEI 1Observed
    1953-10-24 – 1953-10-29
    Chausu-dake (1881 crater)
  5. 1881VEI 1Observed
    1881-07-01 – Ongoing
    Chausu-dake (west and NW side of summit)
  6. 1846VEI 1Observed
    1846-08 – Ongoing
    Chausu-dake
  7. 1410VEI 3Observed
    1410-03-05 – Ongoing
    Chausu-dake
  8. 1408VEI 3Observed
    1408-02-24 – Ongoing
    Chausu-dake
  9. 1404VEI 3Observed
    1404-02-11 – Ongoing
    Chausu-dake
  10. 1397VEI 3Observed
    1397-02-17 – Ongoing
    Chausu-dake
  11. 330 (±200 yrs)VEI 2Geological estimate
    330 – Ongoing
    Chausu-dake
  12. 250 (±200 yrs)VEI 3Geological estimate
    250 – Ongoing
    Chausu-dake
  13. 250 BCEVEI 2Geological estimate
    BCE 250 – Ongoing
    Chausu-dake
  14. 700 BCE (±200 yrs)VEI 3Geological estimate
    BCE 700 – Ongoing
    Chausu-dake
  15. 1440 BCE (±500 yrs)VEI 2Geological estimate
    BCE 1440 – Ongoing
    Chausu-dake
  16. 2000 BCE (±1450 yrs)VEI 2Geological estimate
    BCE 2000 – Ongoing
    Chausu-dake
  17. 4350 BCE (±950 yrs)VEI 2Geological estimate
    BCE 4350 – Ongoing
    Chausu-dake
  18. 5550 BCE (±500 yrs)VEI 3Geological estimate
    BCE 5550 – Ongoing
    Chausu-dake
  19. 6050 BCEVEI 2Geological estimate
    BCE 6050 – Ongoing
    Chausu-dake
  20. 7850 BCEVEI 3Geological estimate
    BCE 7850 – Ongoing
    Chausu-dake
  21. 8550 BCE (±1500 yrs)VEI 2Geological estimate
    BCE 8550 – Ongoing
    Chausu-dake

External links

⚠ For reference only. Not for emergency response.