[net.physics] follow-up to magnetic polar movement

marcus@pyuxt.UUCP (M. G. Hand) (08/12/84)

<1 for you and the rest for me...>

As a follow-up to the various articles on magnetic polar switching and
magnetic drift of the earth's field, I offer the following tid-bit:
On the USGS map of Block Island Ma.; the magnetic variation is 14 degrees
West of True North as of 1970.  I had given other figures for North-west
Britain to counter an assertion that True and magnetic N were identical;
this figure is more relevant to North-Eastern USA.

		Marcus Hand	(pyuxt!marcus)
	"Rule 3: Always trust Centauri."