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A research group coordinated by the University of Helsinki was able to measure a spike in radiocarbon concentration of trees in Lapland that occurred after the Carrington flare. This discovery helps to prepare for dangerous solar storms. The Carrington Event of 1859 is one of the largest recorde
Researchers have reconstructed solar activity back to the year 969 using measurements of radioactive carbon in tree rings. Those results help scientists better understand the dynamics of the sun and allow more precise dating of organic materials using the C14 method. What goes on in the sun can only be observed indirectly. Sunspots, for instance, reveal the degree of solar activity—the more sunspots are visible on the surface of the sun, the more active is our central star deep inside. Even though sunspots have been known since antiquity, they have only been documented in detail since the i...
An international team of researchers led by ETH Zurich has reconstructed solar activity back to the year 969 using measurements of radioactive carbon in...