Patrick Gormley writes:
> I was recently reading the wwv site for latest solar readings and when it
> read the k index, it read (9) nt. What do those symbols mean? 73- pat
Nano Tesla. Magnetic fields can be expressed in teslas in honor
of Nichola Tesla of alternating current fame.
It was Tesla's ideas that ultimately created the way
electric power is distributed from the generators to our homes
and businesses.