Remember that CME from 4/4/13, It just hit Earth

Remember that solar eruption from a few days ago? It just hit Earth | Basic Space, Scientific American Blog Network

This doesn’t always induce currents in the ground. But when it does, sometimes there are disastrous effects.

In March 1989, a geomagnetic storm caused the collapse of Hydro-Québec’s electricity transmission system. 

Six million people were without power for nine hours.

By Kelly Oakes 14 April 2013