That's a very weird and not very precise way to word this. Of course I would expect auroras to be regularly visible in the far northern parts of the USA and Europe:

https://en.wikipedia.org/wiki/File:Aurora_Kp_Map_North_Ameri...

https://en.wikipedia.org/wiki/File:Aurora_Kp_Map_Eurasia.gif

Now if you start seeing Auroras in Lisbon or Miami please let me know!