Key points from article :
In 1859, a powerful solar storm affected the Telegraph systems of the day.
Today it could knock out our electrical grids, satellite communications and the internet.
Estimate of up to $10 trillion of damage.
A new study finds a 12 per cent chance of it happening in the next decade.
Most extreme superflares occur every 20 million years and would disrupt the entire ecosystem.
The study was published in The Astrophysical Journal.
