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Kikai Caldera was the source of the Akahoya eruption, one of the largest eruptions during the Holocene (10,000 years ago to present). About 6,300 years ago or 4,300 BC, pyroclastic flows from that eruption reached the coast of southern Kyūshū up to 100 km (62 mi) away, and ash fell as far as Hokkaidō. The eruption produced about 150 km³ of tephra, giving it a Volcanic Explosivity Index of 7 and making it one of the most explosive in the last 10,000 years, ranking alongside Santorini, Changbaishan, Crater Lake, Kurile Lake and Tambora
A research paper published in Nature Scientific Reports states a lava dome is expanding within the Kikai Caldera.
This is just 50km south of Kyushu — Japan’s most southerly main island.
The dome itself is 9.5km wide. The seabed has been forced upwards some 610 meters by more than 31 cubic kilometres of lava.
Its peak sits just 30m beneath the ocean waves.
But the dome is not in itself a problem.
It’s what it represents.
It means a vastly bigger crucible of magma below has begun building up pressure once again.
If it bursts, researchers say it could kill some 100 million people.
originally posted by: Imagewerx
It wasn't all that long ago that Campi Flegrei/Volcano Solfatara near to Naples in Italy was going to be 'the next big one'.Then like all the other 'next big ones' not a lot happened.
originally posted by: Imagewerx
a reply to: mtnshredder
As I would imagine they all share the same magma chamber,Aston and Vesuvius would probably get quite angry as well.
originally posted by: mtnshredder
a reply to: Imagewerx
I don't believe they do connect, Stromboli is in the Calabrian volcanic arc on the Eurasian plate. Vesuvius is in the Campanian volcanic arc on the African plate. At least thats the way I understand what I've read.
Mount Etna is associated with the subduction of the African plate under the Eurasian plate, which also produced Vesuvius and Campi Flegrei, but is part of a different volcanic arc (the Calabrian rather than Campanian). A number of theories have been proposed to explain Etna's location and eruptive history, including rifting processes, a hot spot, and intersection of structural breaks in the crust. Scientists are still debating which best fits their data, and are using a variety of methods to build a better image of the Earth's crust below the volcano.