Leezyjet, hi there. As far as remember at the equator it's 900 NM/H as per quotation above 15 DEG per hour. It does change though with latitude with COS of the angle or latitude. Lets say at 60 deg latitude the speed would be 900*cos60deg=450 As one can see it's half of the speed from the equator.
Here is the million dollar question what's the speed on the north pole? By the way isn't it the earth's rotation speed?
Happy new year to everyone!!!
