Iruka rya Akahoya

+Ikirunga:  Kikai Caldera Itariki: 6.860 kugeza 7.440 imyaka yahinduwe mbere yubuhttps://www.sciencedirect.com/science/article/abs/pii/S0277379113000413Ubwoko: Ultra-PlinianAhantu: Kyūshū, JapanVIE: 7.2Impact: Kimwe muri bitandatu gusa byemejwe kuruka kw'ubunini bwacyo muri Holocene; yahinduye cyane ibimera mu majyepfo ya Kyūshū kandi bigira ingaruka ku muco wa Jōmon
Iruka rya Akahoya 

Iruka rya Akahoya ni ryo rikomeye ryamenyekanye cyane mu birunga bya Kikai Caldera i Kyūshū, mu Ubuyapani . Yasohoye meterokibe 150 (36 cu mi) y'ibikoresho by'ibirunga, ukabiha urutonde rw'ibirunga biturika bya 7. 

 Gusubiramo amatariki 
Ubucukuzi bw'amatariki bwanditswe ko kuva ku myaka yaza 7.300  mugihe cyambere cy'igihe cya Jōmon,  ariko nanone yari yarakosowe na radiocarubone yanditswe nko mu myaka yaza 6.500  .  Kugeza ubu byemewe ko hashirwaho itariki kuva ahandi hantu henshi mu imyaka yaza7.200 kugeza 7.300 ishize.   

 Ingaruka 
Uku guturika kwagize uruhare mu iherezo ry’umuco wa mbere wa Jōmon mu majyepfo ya Kyūshū nubwo ingaruka, zashyizweho ikimenyetso, kitari kinini nkuko bamwe babisobanuye babivuze hamwe n’umuco wo kubumba wo mu bwoko bwa Nishinozono, wari watangiye kubungabungwa mbere na nyuma yo guturika. i Kyūshū.  Byatwaye hafi imyaka 1000 yo gukira.  Jōmon wari utuye kure yarokokeye nko mu majyaruguru ya Kyūshū, Honshū na Hokkaidō ariko birashoboka ko byabaye ngombwa ko asubira mu gihe runaka yerekeza ku biribwa byo mu nyanja ahanini. 

Iherezo ry’umuco wa mbere wa Jōmon mu majyepfo ya Kyūshū ntaho rihuriye n’irimbuka ry’umuco wa Minoan, ushobora kuba wararangiye bitewe n’ikindi kirunga kinini.

Icyakora, ibyo bintu byabaye biha cyane imigenzo y'umuco gukomeza inkuru z'umuco washizweho uzimangana vuba na bwangu, kubera ko bizwi ko byabayeho mumateka yabantu ( Holocene ), mubice bibiri bitandukanye byisi. Ibirori birasaba kandi ubushakashatsi bwimbitse ku ngaruka z’ibikorwa by’ibirunga ku iterambere ry’umuco w’abantu. 

 Amashakiro