Academy of Finland
Funding decision
Name Usoskin, Ilya
Organisation OY
Project title
Extreme Solar Particle Events: Risk Assessment (ESPERA)
Decision No. 321882
Decision date 11.06.2019
Funding period 01.09.2019 - 31.08.2023
Funding 487 352
WebFOCUS Report
Project description
The Sun sporadically produces eruptive events, such as flares or coronal mass ejections, which strongly affect the Earth's radiation environment and cause serious hazards to the modern technological society. Direct solar data cover only several decades, which is too short to study extreme events. Extreme events in the past can only be studied by cosmogenic proxies, such as radicarbon, produced in the Earth's atmosphere and stored in natural archives (tree trunks, ice cores, sediments). Here we aim to study extreme solar particle storms on the long-time scale, focusing on the Holocene (last 12000 years) and extending even further, basing on existing and new measurements of cosmogenic nuclides and models to be developed beyond the present state of the art. We will evaluate, for the first time, the limits of our Sun in producing extreme events, their energy spectra and occurrence probability, and also to assess their potential effects in the environment and risks for the society.