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OUT OF MIND » PLANET AWARENESS » NATURE & ENVIRONMENT » Massive Cosmic Event Recorded in Tree Rings 1,200 years Ago!

Massive Cosmic Event Recorded in Tree Rings 1,200 years Ago!

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ymoilman2


Massive Cosmic Event Recorded in Tree Rings 1,200 years Ago! supernovae and solar flares ruled out

Posted By: Susoni
Date: Friday, 15-Jun-2012 18:26:44
Susoni


Just over 1,200 years ago, the planet was hit by an extremely intense burst of high-energy radiation of unknown cause, scientists studying tree-ring data have found.
The radiation burst, which seems to have hit between ad 774 and ad 775, was detected by looking at the amounts of the radioactive isotope carbon-14 in tree rings that formed during the ad 775 growing season in the Northern Hemisphere. The increase in 14C levels is so clear that the scientists, led by Fusa Miyake, a cosmic-ray physicist from Nagoya University in Japan, conclude that the atmospheric level of 14C must have jumped by 1.2% over the course of no longer than a year, about 20 times more than the normal rate of variation. Their study is published online in Nature today1.
"The work looks pretty solid," says Daniel Baker, a space physicist at the University of Colorado's Laboratory for Atmospheric and Space Physics in Boulder, Colorado. "Some very energetic event occurred in about ad 775."
Related stories
Exactly what that event was, however, is more difficult to determine.
Read More:
http://www.nature.com/news/mysterious-radiation-burst-recorded-in-tree-rings-1.10768

Guest

Anonymous
Guest
Cool thanks YM! :)

Herb Lady

Herb Lady
Very Interesting YM!! Thanks!



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