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993–994 carbon-14 spike

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The 993–994 carbon-14 spike was a rapid increase in carbon-14 content from tree rings, and followed the 774–775 carbon-14 spike.[1] This event is also confirmed by a sharp increase of beryllium-10 and hence considered as solar-origin. [2] It may have come from a massive solar storm as a series of auroral observations are known to be observed in late 992. [3]

See also

References

  1. ^ Miyake, F.; et al. (2013). "Another rapid event in the carbon-14 content of tree rings : Nature Communications : Nature Publishing Group".
  2. ^ Mekhaldi, F.; et al. (2015). "Multiradionuclide evidence for the solar origin of the cosmic-ray events of ᴀᴅ 774/5 and 993/4 : Nature Communications : Nature Publishing Group".
  3. ^ Hayakawa, H.; et al. (2017). "Historical Auroras in the 990s: Evidence of Great Magnetic Storms : Solar Physics : Springer".
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