A gigantic solar storm hit Earth about 2,600 years ago, one about 10 times stronger than any solar storm recorded in the modern day, a new study finds. If it happens again, we could have big trouble. - NBCNewsMACH
. Worse yet, the world has become far more dependent on electricity since the Carrington Event, and if a similarly powerful geomagnetic storm were to hit now, power outages might last weeks, months or even years as utilities struggle to replace key parts of power grids, the 2013 study found.
The scientists examined ice from two core samples taken from Greenland. They noted a spike of radioactive beryllium-10 and chlorine-36 about 2,610 years ago. This matches prior work examining tree rings that suggested a spike of carbon-14 about the same time. [Previous research detected two other ancient proton storms in a similar manner — one happened about A.D. 993-994, and the other about A.D. 774-775. The latter is the largest solar eruption known to date.
It remains unclear how these ancient proton storms compared with the Carrington Event, since estimates of the number of protons from the Carrington Event are very uncertain, Muscheler said. However, if these ancient solar outbursts"were connected with a geomagnetic storm, I would assume that they would exceed the worst-case scenarios that are often based on Carrington-type events," he noted.
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