Physics colloquium: Prof. Ilya Usoskin, Sodankyla Geophysical Observatory (Oulu unit) and Dept. of Physics, University of Oulu, Finland
|When:||Mo 03-04-2017 at 13:00|
|Where:||Energy Academy Europe Building, Nijenborgh 6, room 5159.0010|
Title: An assessment of extreme solar particle storms using cosmogenic isotopes in natural archives
The modern technological society is vulnerable to space radiation risks, in particular strong solar particle storms. We have a record of such events for the last 60 years, but it is crucially important to know what could be a worst-case scenario for such a storm, we can expect from the Sun. Astronomical observations suggest that superflares may occur on sun-like stars, being many orders of magnitude greater than observed solar flares. Can we expect something like that on the Sun?Some answers can be obtained using a record of cosmogenic radioisotopes stored in natural terrestrial archives, in particular radiocarbon 14C.