Science & Space :  The Official GrahamHancock.com forums
For all that is Scientifically related to Cosmology and Space. (NB: Please take discussions about UFOs, possible Alien contact, Crop-Circles, Alien Abductions, Planet-X and Niburu to the ‘Paranormal and Supernatural’ Message Board). 
Welcome! Log InRegister
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 Usoskin et al. (2013). 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 Mikhaldi, 2014 for example).

Jonny

Options: ReplyQuote


Subject Views Written By Posted
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 1333 JonnyMcA 07-Sep-18 13:15
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 158 D-Archer 07-Sep-18 13:59
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 196 JonnyMcA 07-Sep-18 14:12
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 166 Aine 08-Sep-18 01:02
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 185 JonnyMcA 08-Sep-18 10:41
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 166 Aine 08-Sep-18 11:41
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 186 JonnyMcA 09-Sep-18 09:38
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 169 ianw16 08-Sep-18 10:44
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 161 Archaic 08-Sep-18 21:36
Re: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE 284 JonnyMcA 09-Sep-18 09:54


Sorry, only registered users may post in this forum.