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JonnyMcA Wrote:
-------------------------------------------------------
> Hi Daniel,
>
> I had no involvement in the paper, though I did
> read an early draft of it.
>
> The consensus for the origin of these radiocarbon
> excess events is one (or more) Solar Proton
> Events. See for example
> [url=https://www.researchgate.net/publication/2357
> 26822_The_AD775_cosmic_event_revisited_The_Sun_is_
> to_blame]Usoskin et al. (2013)[/url]. It had been
> conjectured that a close gamma ray burst or
> supernova may have been the cause, but such events
> do not appear to have the correct radiation
> spectrum to generate the measured isotopic
> anomalies in 14C, 10Be and 36Cl (see
> [url=http://lup.lub.lu.se/luur/download?func=downl
> oadFile&recordOId=4584299&fileOId=4584302]Mikhaldi
> , 2014[/url] for example).
>
> Jonny

Have they found the supernova? Do any contemporary writings make any mention of it?

1984 was a warning, not a how-to guide.

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Subject Views Written By Posted
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 1405 JonnyMcA 07-Sep-18 13:15
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 180 D-Archer 07-Sep-18 13:59
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 235 JonnyMcA 07-Sep-18 14:12
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 187 Aine 08-Sep-18 01:02
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 218 JonnyMcA 08-Sep-18 10:41
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 187 Aine 08-Sep-18 11:41
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 224 JonnyMcA 09-Sep-18 09:38
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 195 ianw16 08-Sep-18 10:44
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 181 Archaic 08-Sep-18 21:36
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 326 JonnyMcA 09-Sep-18 09:54


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