Ata Caldera
The caldera contributed to an eruption which has been dated to about 100,000 years before present (range by various techniques mostly fall 100,000 to 109,000) that generated the Ata tephra in southern Japan. This eruption has been assigned a VEI of 7.5 and generated over of tephra. This is overlaid in some places in Japan by the more recent Mitake No. 1 (On-Pm1) tephra from an eruption in the Mount Ontake area and K-Tz tephra from the Kikai Caldera. There have been many more lesser eruptions.
Details
- Age
- Pleistocene (240,000 years ago) onwards
- Arca
- "Ōsumi islands",30.6,130.2,12px, #777755, 10deg, 1.5, 0.75, 1
- Arcb
- "Inner and Outer",30.82,130.37,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arcc
- "Kikai Caldera",30.77,130.57,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arcd
- "Ata South Caldera",31.15,130.85,12px, #ff0000, 0deg, 0.09, 7.5, 1
- Arce
- "Ata North Caldera",31.29,130.85,12px, #ff0000, 0deg, 0.09, 7.5, 1
- Arcf
- "Aria Caldera",31.54,130.87,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arcg
- "Kakuto",32.1,130.47,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arch
- "Caldera",31.99,130.47,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arci
- "Kobayashi",32.035,131.01,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Arcj
- "Caldera",31.93,131.04,12px, #ff00ff, 0deg, 0.09, 7.5, 1
- Type
- CalderaSomma volcano
- Zoom
- 8
- Float
- center
- Width
- 260
- Height
- 500
- Caption
- Map showing the Ata calderas within the Kagoshima graben with the other graben caldera and active volcanoes as symbols
- Country
- Japan
- Highest
- Mount Kaimon
- Location
- Kagoshima, Japan
- Width Km
- 15
- Image Map
- {{OSM Location map
- Length Km
- 25
- Elevation M
- 924
- Subdivision1
- Kagoshima Prefecture
- Subdivision2
- Ibusuki, Kagoshima, Kimotsuki District, Tarumizu
- Subdivision4
- Ata South Caldera, Ata North Caldera, Ikeda Caldera
- Last Eruption
- 885 CE
- Subdivision2 Type
- Region
- Subdivision4 Type
- Geological Subdivisions
- Width Orientation
- EW
- Length Orientation
- NS