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Mysterious radiation burst recorded in tree rings
Nature ^ | Sunday, June 3, 2012 | Richard A. Lovett

Posted on 06/04/2012 10:58:45 AM PDT by SunkenCiv

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...

The only known events that can produce a 14C spike are floods of γ-rays from supernova explosions or proton storms from giant solar flares. But neither seems likely, Miyake says, because each should have been large enough to have had other effects that would have been observed at the time.

A massive supernova, for example, should have been bright enough to produce a 'new' star visible even in the daytime, as was the case for two known supernovae in AD 1006 and AD 1054. Such an explosion would have needed to be brighter than either of these, Miyake says, because those events were not large enough to leave traces in the 14C record.

It is possible, he says, that the proposed event might have occurred in the far southern skies, where astronomers of the era wouldn't have seen it. But still, he says, if it did happen, today's X-ray and radio astronomers should have found signs of a "tremendously bright" remnant of the explosion.

(Excerpt) Read more at nature.com ...


TOPICS: History; Science; Travel
KEYWORDS: 774ad; 775ad; ad774; ad775; anglosaxonchronicle; carbon14; catastrophism; charlemagne; charlemagneevent; cme; coronalmassejection; dendrochronology; fusamiyake; gammaray; gammarays; godsgravesglyphs; protonevent; protonstorm; ralphneuhauser; solar; solarflares; valerihambarya; valerihambaryan
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Auroras are seen when bursts of charged particles hit Earth's atmosphere -- but there is no record of these occurring at the same time as the 14C increase in tree rings. ©Nasa

Mysterious radiation burst recorded in tree rings

1 posted on 06/04/2012 10:58:51 AM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

In before that "give me a nice fat grant please" idiocy begins. Extra to the APoD list.
In the late eighth century, Earth was hit by a mystery blast of cosmic rays, according to a Japanese study that found a relic of the powerful event in cedar trees. Analysis of two ancient trees found a surge in carbon-14 -- a carbon isotope that derives from cosmic radiation -- which occurred just in AD 774 and AD 775, the team report in the journal Nature on Sunday. Earth is battered by protons and other sub-atomic particles which are blasted across space by high-energy sources. The particles collide with the stratosphere and react with nitrogen to create carbon-14, which is then absorbed into the biosphere. A team led by Fusa Miyake of Nagoya University found that levels of carbon-14 in the two cedars were about 1.2% higher in 774 and 775 compared to other years... the cosmic whack of 774-775 cannot be attributed to the Schwabe cycle of the time -- and it is far bigger than any known flare from the Sun. The other possibility is a supernova, or a star that explodes at the end of its life in a welter of gamma radiation. They intend to fine-tune the search for the source by looking at telltale traces of beryllium and nitrate isotopes. They also plan a wider search of historical documents to see if, 1,237 years ago, anyone noted a strange flare in the sky. [ Ancient cedar trees hold 8th-century mystery, AFP ] Ancient cedar trees hold 8th-century mystery

Credit: Wikimedia

2 posted on 06/04/2012 11:00:38 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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To: 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; ...



3 posted on 06/04/2012 11:01:19 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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To: Renfield; StayAt HomeMother; Ernest_at_the_Beach; decimon; 1010RD; 21twelve; 24Karet; ...

 GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach
Thanks Renfield et al. :')

To all -- please ping me to other topics which are appropriate for the GGG list.


4 posted on 06/04/2012 11:03:16 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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To: SunkenCiv

No novas or super-novas recorded during that period of time?


5 posted on 06/04/2012 11:03:34 AM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
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To: KevinDavis; annie laurie; Knitting A Conundrum; Viking2002; Ernest_at_the_Beach; Mmogamer; ...

Probably of interest.

 
X-Planets
· join · view topics · view or post blog · bookmark · post new topic · subscribe ·
Google news searches: exoplanet · exosolar · extrasolar ·

6 posted on 06/04/2012 11:03:49 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization

by Richard Firestone,
Allen West, and
Simon Warwick-Smith


7 posted on 06/04/2012 11:04:29 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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To: SunkenCiv
and scientology myth begins...paging Shirley McCain.
kidding aside....thxs, for the ping. :-)

8 posted on 06/04/2012 11:05:39 AM PDT by skinkinthegrass (WA DC E$tabli$hment; DNC/RNC/Unionists...Brazilian saying: "$@me Old $hit; different flie$". :^)
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To: SunkenCiv

There are actually non fossilized cedar trees out there that are 1300 years old?

Wow!


9 posted on 06/04/2012 11:05:55 AM PDT by hattend (Firearms and ammunition...the only growing industries under the Obama regime.)
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To: SunkenCiv

10 posted on 06/04/2012 11:06:12 AM PDT by Snickering Hound
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To: SunkenCiv

11 posted on 06/04/2012 11:07:08 AM PDT by AngelesCrestHighway
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To: BenLurkin


No account has survived. The Crab Nebula formation was in the 11th c, and there's a record of that (Chinese court, perhaps others?), but no trace of a similar elevation in the tree rings. Whatever it was, must have rung some bells. And the best part, crud from the blow-up will take longer to get here than the cosmic rays, but it will get here. :'o
A Celestial Collision
by Larry Gedney
February 10, 1983
Early in the evening of June 18, 1178, a group of men near Canterbury, England, stood admiring the sliver of a new moon hanging low in the west. In terms they later described to a monk who recorded their sighting, "Suddenly a flaming torch sprang from the moon, spewing fire, hot coals and sparks." In continuing their description of the event, they reported that "The moon writhed like a wounded snake and finally took on a blackish appearance"... [P]lanetary scientist Jack Hartung of the State University of New York... gathered enough clues to suggest that a large asteroid... might have smacked into the moon just over the horizon on the back side. To test his suspicion, Hartung went to the Lunar and Planetary Institute in Houston, and inspected Russian and American photographs of the moon's back side. Sure enough, in just the right place, he found a remarkably fresh crater, 12 miles across and twice as deep as the Grand Canyon. From it radiated white splatter marks for hundreds of miles... Such an impact, reason astrophysicists, would set the moon to ringing like a gong for thousands of years... At Texas' McDonald Observatory, astronomers Odile Calame and J. Derral Mulholland of the University of Texas find that the surface of the moon moves back and forth fully 80 feet! Such an oscillation clearly implies a collision with something large, sometime within the not-too-distant past, probably within the memory of mankind. The problem is that there is no way to peg the date exactly at 1178.

12 posted on 06/04/2012 11:09:25 AM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
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To: skinkinthegrass

That was 75 million years ago...


13 posted on 06/04/2012 11:10:04 AM PDT by null and void (Day 1231 of our ObamaVacation from reality [and what dark chill/is gathering still/before the storm])
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To: SunkenCiv

“The radiation burst, which seems to have hit between AD 774 and AD 775”

Were they prototyping the Fukushima Daiichi reactors then?


14 posted on 06/04/2012 11:11:18 AM PDT by USMCPOP (Father of LCpl. Karl Linn, KIA 1/26/2005 Al Haqlaniyah, Iraq)
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To: SunkenCiv

15 posted on 06/04/2012 11:14:40 AM PDT by Blogatron (Brought to you by The American Frog Council; 'Frog - The other green meat')
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To: Pride in the USA
Pinging you to post #7 for a book I think you would enjoy.
16 posted on 06/04/2012 11:17:18 AM PDT by lonevoice (Klepto Baracka Marxo, impeach we much.)
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To: USMCPOP
It is probably more proof that "more happened at Fukushima than we were told", and that "an eeeeevvilllll corporation only concerned with profits" (i.e., TEPCO) is just lying and covering it up. What really happened was that Fukushima melted down into the center of the earth and combined with all the uranium down there and made a mini-black hole that caused a time warp and sent all of Fukushima's radiation in to the past and caused that excess 14C we are seeing in those tree rings. Yeah, that's it. And we have a "scientific study) to prove it, and I am sure that people like Robert Alvarez and Arnie Gunderson and Helen Caldicott and Amory Lovins will probably be getting ready to verify it. And when that mini-black hole breaks through to the other side of the Earth, you know what that means:

We Are All Going To Die

(in case it wasn't obvious, /s)

17 posted on 06/04/2012 11:24:08 AM PDT by chimera
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To: chimera

The end is near.

I’m gonna reach around and scratch mine, then kiss it goodbye. But not until I vote a few people out in November and use some of the coupons I’ve been collecting.


18 posted on 06/04/2012 11:38:31 AM PDT by USMCPOP (Father of LCpl. Karl Linn, KIA 1/26/2005 Al Haqlaniyah, Iraq)
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To: BenLurkin
No novas or super-novas recorded during that period of time?

Not, at least, from where it could have been seen from the northern hemisphere, which is where much of the remembered astronomy was happening.

It might be interesting to research some of the mythology or remembered lore of southern hemisphere peoples to see if anything might be connected.

19 posted on 06/04/2012 11:39:44 AM PDT by Just another Joe (Warning: FReeping can be addictive and helpful to your mental health)
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To: AngelesCrestHighway

LOL! Somebody had to post “it”!


20 posted on 06/04/2012 11:44:47 AM PDT by WKUHilltopper (And yet...we continue to tolerate this crap...)
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