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Mount Adatara

Adatarayama

Stratovolcano · Japan · 1728m

The broad Adatara massif is composed of a group of cones and lava domes, seen here from the W. The unvegetated area on the left summit ridge is a 1-km-wide circular crater that has been mined for sulfur. Seventy-two miners working in the crater were killed during an explosive eruption in 1900.
The broad Adatara massif is composed of a group of cones and lava domes, seen here from the W. The unvegetated area on the left summit ridge is a 1-km-wide circular crater that has been mined for sulfur. Seventy-two miners working in the crater were killed during an explosive eruption in 1900. · Photo: Photo by Lee Siebert, 1988 (Smithsonian Institution). · Wikimedia Commons
Type
Stratovolcano
Country
Japan
Region
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Elevation
1728m
Coordinates
37.647, 140.281
Last eruption
1996
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The broad forested massif of Adatarayama volcano is located E of Bandai volcano, about 15 km SW of Fukushima city. It consists of a group of dominantly andesitic stratovolcanoes and lava domes that rise above Tertiary rocks on the south and abut Azumayama volcano on the north. Construction took place in three main stages that began about 550,000, 350,000, and 200,000 years ago. The high point of the complex is 1728-m-high Minowasan, a dome-shaped stratovolcano north of Tetsuzan, the currently active stratovolcano. Numanotaira, the active summit crater, is surrounded by hot springs and fumaroles and is breached by the Iogawa river ("Sulfur River") on the west. Seventy-two workers of a sulfur mine in the summit crater were killed during an eruption in 1900. Historical eruptions have been restricted to the 1.2-km-wide, 350-m-deep Numonotaira crater.

From Wikipedia

This summary is short — open the full article for more detail.

Mount Adatara is a stratovolcano in Fukushima Prefecture, Japan.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
8050 BCE~7715 BCE · 1 eruptions · max VEI 36711 BCE~6376 BCE · 1 eruptions · max VEI 36376 BCE~6041 BCE · 1 eruptions · max VEI 34366 BCE~4032 BCE · 1 eruptions · max VEI 32692 BCE~2357 BCE · 1 eruptions · max VEI 31688 BCE~1353 BCE · 1 eruptions · max VEI ?683 BCE~348 BCE · 1 eruptions · max VEI 3348 BCE~13 BCE · 1 eruptions · max VEI ?657~991 · 1 eruptions · max VEI ?1661~1996 · 4 eruptions · max VEI 28050 BCE5706 BCE3027 BCE683 BCE1661

Detailed timeline

  1. 1996VEI 1Observed
    1996-09-01 – 1996-09-01
    Numanotaira
  2. 1900VEI 2Observed
    1900-07-17 – 1900-07-17
    Numanotaira
  3. 1899VEI 2Observed
    1899-08-24 – 1899-11-12
    Numanotaira
  4. 1813VEI 1Geological estimate
    1813-01-10 – Ongoing
    Numanotaira
  5. 950 (±50 yrs)VEI ?Geological estimate
    950 – Ongoing
    Numanotaira
  6. 50 BCE (±900 yrs)VEI ?Geological estimate
    BCE 50 – Ongoing
    Numanotaira
  7. 590 BCE (±200 yrs)VEI 3Geological estimate
    BCE 590 – Ongoing
    Numanotaira
  8. 1550 BCE (±1100 yrs)VEI ?Geological estimate
    BCE 1550 – Ongoing
    Numanotaira
  9. 2600 BCE (±50 yrs)VEI 3Geological estimate
    BCE 2600 – Ongoing
    Numanotaira
  10. 4300 BCE (±850 yrs)VEI 3Geological estimate
    BCE 4300 – Ongoing
    Numanotaira
  11. 6150 BCE (±100 yrs)VEI 3Geological estimate
    BCE 6150 – Ongoing
    Numanotaira
  12. 6650 BCE (±100 yrs)VEI 3Geological estimate
    BCE 6650 – Ongoing
    Numanotaira
  13. 8050 BCEVEI 3Geological estimate
    BCE 8050 – Ongoing
    Numanotaira

External links

⚠ For reference only. Not for emergency response.