Re: Earth's magnetic field

[brian whatcott <inet@intellisys.net>]

At 14:23 10/6/97 +0000, you wrote:
> I am trying to obtain a numerical value for the strength of the earth's
> magnetic field here in Edinburgh.  Can anyone tell me where to look or who
> to ask
>
> Ian
>
> Ian Cameron

The geomagnetic field varies with time, and from place to place.
 There is a suspicion that a recent decline may even be a precursor 
to a flip. As you know this kind of event has been recorded numerous 
times by ocean core analysis, in conjuction with experimental
confirmations of the plate tectonic hypothesis, now considered
well-based.

I believe that Britain runs at least one observatory where the field is
monitored. Severe sun-spots have provided transient shifts in field
noticeable even with a mariner's compass.
 I want to recall that Greenwich did observations.
Though I last visited them at Hertmonceaux Castle, I believe they 
moved again, under the aegis of Cambridge U. 
Accordingly, I'd call there first.

Regards

brian whatcott <inet@intellisys.net>
Altus OK