How Vulnerable is Earth to a Solar Flare?

(Starts With A Bang!) – Ethan Siegel:

A solar flare from our Sun, which ejects matter out away from our parent star and into the Solar System, is a relatively typical event. However, a large-magnitude, energetic flare or a coronal mass ejection could do a whole lot of damage to our electrical and electronic infrastructure, costing trillions of dollars and potentially killing and displacing millions. …

starts-with-a-bang vulnerable earth
Solar flare