Radioactive particles from huge solar storm found in Greenland

Discovery raises questions about emergency plans in place for severe space weather:

With our dependence on satellite navigation and timing systems for many services and capabilities we now take for granted, news that the last two extreme events have occurred at ~1500 year intervals must force a rethink of the chance and severity of potential solar storm events and the vulnerabilities modern society faces.  The implications are significant.

See article at:

https://www.theguardian.com/science/2019/mar/11/radioactive-particles-from-huge-solar-storm-found-in-greenland?CMP=Share_iOSApp_Other