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Q: navigation geography ( Answered,   2 Comments )
Question  
Subject: navigation geography
Category: Science
Asked by: oaksrok-ga
List Price: $2.00
Posted: 21 Aug 2002 08:17 PDT
Expires: 20 Sep 2002 08:17 PDT
Question ID: 56959
What are the coordinates (latidude and longitude) for magnetic north?
Answer  
Subject: Re: navigation geography
Answered By: iaint-ga on 21 Aug 2002 08:35 PDT
 
Hi oaksrok

Bear in mind that the magnetic north pole moves over time, so any grid
reference is merely a snapshot and not a permanent position.
http://www.cnn.com/2002/TECH/space/03/20/north.pole/?related?related

An image plotting the route of magnetic north throughout the 20th
Century can be seen towards the bottom of:
http://deeptow.whoi.edu/northpole.html

The most recent figures for which a detailed position of magentic
north has been surveyed seem to be those from 1994:
"... the average position of the North Magnetic Pole in 1994 was
located on the Noice Peninsula, southwest Ellef Ringnes Island, at
78.3 deg N, 104.0 deg W. The yearly motion of the pole has increased,
and is now 15 km per year."
http://www.geolab.nrcan.gc.ca/geomag/e_nmpole.html

Note that detailed, accurate surveys of the true position of magnetic
north are usually carried out once every ten years, so there should be
more recent figures due with a couple of years.

I hope this helps.

Regards
iaint-ga


Google search terms used:
magnetic north location
://www.google.co.uk/search?q=magnetic%20north%20location
Comments  
Subject: Re: navigation geography
From: cogpsych-ga on 21 Aug 2002 10:01 PDT
 
You may be interested in the Astronomy Picture of the Day (APOD) for
August 18, 2002 at:
http://antwrp.gsfc.nasa.gov/apod/ap020818.html
Subject: Re: navigation geography
From: oaksrok-ga on 21 Aug 2002 14:57 PDT
 
THANKYOU FOR YOUR ANSWER IAINT-GA.
VERY GOOD-JUST WHAT I NEEDED. LAT LOG COORDINATES, AS STATED. 
NO MORE INFO NEEDED. THANX.

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