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What (who) is 993–994 carbon-14 spike - definition
993–994 carbon-14 spike
SOLAR STORM
993-994 carbon-14 spike
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. This event is also confirmed by a sharp increase of beryllium-10 and hence considered to be of solar origin.
994
![King [[Otto III]] (left) and [[Heribert of Cologne]]](https://commons.wikimedia.org/wiki/Special:FilePath/Kreuzau St. Heribert5736 (detail1).jpg?width=200 "King [[Otto III]] (left) and [[Heribert of Cologne]]")
YEAR
994 A.D.; 994 (year); Year 994; AD 994; 994 CE; 994 AD; Events in 994; Births in 994; Deaths in 994
Year 994 (CMXCIV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.
radiocarbon
![archive-date=2007-12-09 }}</ref> The annotated PTBT label is representative of the [[Partial Nuclear Test Ban Treaty]].](https://commons.wikimedia.org/wiki/Special:FilePath/Radiocarbon bomb spike.svg?width=200 "archive-date=2007-12-09 }}</ref> The annotated PTBT label is representative of the [[Partial Nuclear Test Ban Treaty]].")
ISOTOPE OF CARBON
Radiocarbon; Carbon 14; 14c; Carbon14; 14C
also radio carbon
Radiocarbon is a type of carbon which is radioactive, and which therefore breaks up slowly at a regular rate. Its presence in an object can be measured in order to find out how old the object is.
The most frequently used method is radiocarbon dating.
N-UNCOUNT: usu N n
