In 1859 there was a CME that has become known as the most intense Geomagnetic Storm experienced on Earth.
At the time there was not much known about this thing.
It has been given a name, what is it?
What is a CME?
Should we as mariners be concerned today? Discuss.
Before you make a diversion to google there are a few clues. Try working it out.
My thoughts next week.