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Aira caldera is located at Kyushu, the southernmost island of Japan. The supervolcano peaks at 1117 m. [6]The eruption forming the Aira Caldera, occurred approximately 30,000 years ago, and resulted in tephra and ignimbrite from a vast amount of magma affecting the nearby land.
A major three phase eruption of the Aira Caldera formed in the first phase the Osumi pumice fall, had a second phase Tsumaya pyroclastic flow and in the third Ito eruption phase produced the widely distributed Aira-Tn tephra that has been dated at 29,428 to 30,148 years calibrated before present.
A volcano that once existed in the northern part of Kagoshima Bay caused an eruption called the Great Aira Eruption about 25,000 years ago, forming the Aira Caldera. Aira City is located on the northwest side of this caldera, on the somma, and there is a stratum called Shirasu, which originated from pyroclastic flows that flowed out during a ...
Sakurajima is a modern active vent of the same Aira caldera volcano. Sakurajima was formed by later activity within the caldera, beginning about 13,000 years ago. [9] It is about 8 km (5 mi) south of the centre of the caldera. Its first eruption in recorded history was in 963 AD. [10]
Though such enormous eruptions are extremely infrequent, both volcanoes have remained active with much smaller eruptions in historic times, with Sakurajima in the bay and the Kirishima Mountains north of the bay forming active vents associated with the Aira volcano magma sources, and the smaller 4000-year-old Ikeda Caldera with Mount Kaimon at ...
Any supervolcano eruption has the potential for significant loss of life and environmental damage. That Campi Flegrei is located right at the doorstep of a city of a half-million people only ...
The Long Valley Caldera was formed by a super-eruption about 760,000 years ago that blasted 140 cubic miles of magma, covering much of east-central California in hot ash that was blown as far away ...
Aira Caldera: Kyūshū: 940 - 1,040 [2] 30 [3] Ito Ignimbrite 6 Nemo Peak: Onekotan, Kuril Islands: 10 30.8 Nemo III 6 Shiveluch: Kamchatka >30 32.2 caldera formation 6 Volcán Los Azufres: Trans-Mexican Volcanic Belt 11 32.8 Cieneguillas Ignimbrite 6 Morne Trois Pitons: Dominica, Lesser Antilles island arc 58 33.3 Roseau Tuff/Ignimbrite 7 Lake ...