Including Original "Paul H. Letters" Copyright © 1996-2017 Paul V. Heinrich - All rights reserved.



Thursday, 7 June 2012

Mysterious radiation burst recorded in tree rings (774–775 AD)

Mysterious radiation burst recorded in tree rings (774–775 AD)

Cosmic rays showered Earth 1230 years ago, but
where from? Los Angeles Times, June 4, 2012
http://www.latimes.com/news/science/sciencenow/la-sci-sn-cosmic-ray-increase-20120604,0,6401794.story?track=rss

Mysterious radiation burst recorded in tree rings
(Spike in carbon-14 levels indicates a massive
cosmic event — but supernovae and solar flares
ruled out.) by Richard A. Lovett, June 2, 2012
http://www.nature.com/news/mysterious-radiation-burst-recorded-in-tree-rings-1.10768

The paper is:

Miyake, F., K. Nagaya, K. Masuda, and T.
Nakamura, 2012, A signature of cosmic-ray
increase in ad 774–775 from tree rings in
Japan. Nature. Published online June 3, 2012.
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature11123.html

Best wishes,

Paul H.