JPL news release, 1 Dec 1989: Pang, Srivastava, Keston and Chou date Thera to the late 17th century BC from Chinese records of King Jie (dim sun, three suns, frost in the 6th month, seven-year drought), matched to the Greenland ice cores and tree rings of the time (AGU Fall Meeting 1989)
How it connects
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The early books remember failed harvests, mixed cold and heat and a five-year drought at the Xia's end; the ice cores show four eruptions in 1561-1550 BC, about when Erlitou ended same broad pairing, older ice dates
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Why did the Xia dynasty fall (about 1600 to 1530 BC), and do the omens told of its end remember a real eruption?