Here's the bits that may most directly answer GP's question: > A geomagnetic storm of this magnitude occurring today would cause widespread electrical disrupti

Here's the bits that may most directly answer GP's question: > A geomagnetic storm of this magnitude occurring today would cause widespread electrical disruptions, blackouts, and damage due to extended outages of the electrical power grid. > In June 2013, a joint venture from researchers at Lloyd's of London and Atmospheric and Environmental Research (AER) in the US used data from the Carrington Event to estimate the cost of a similar event in the present to the US alone at US$600 billion to $2.6 trillion (equivalent to $698 billion to $3.02 trillion in 2021[28]), which, at the time, equated to roughly 3.6 to 15.5 per cent of annual GDP.