Researchers report spikes in the concentrations of the cosmogenic radionuclides beryllium-10 and chlorine-36 measured in two Greenland ice cores consistent with a strong solar storm having occurred around 660 BC, only the third such storm documented; the authors estimate that the storm was an order of magnitude stronger than any instrumentally recorded solar event.
###
Article #18-15725: "Multiradionuclide evidence for an extreme solar proton event around 2,610 B.P. (?660 BC)," by Paschal O'Hare et al .
MEDIA CONTACT: Raimund Muscheler, Lund University, SWEDEN; tel: +46-46-222-0454, +46-729-234-263; e-mail: Raimund.Muscheler@geol.lu.se
Proceedings of the National Academy of Sciences