File:Magnetic North Pole Positions.svg
Original file (SVG file, nominally 567 × 581 pixels, file size: 470 KB)
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Summary
DescriptionMagnetic North Pole Positions.svg |
English: Magnetic north pole positions of the Earth.
Poles shown are dip poles, defined as positions where the direction of the magnetic field is vertical. Red circles mark magnetic north pole positions as determined by direct observation, blue circles mark positions modelled using the GUFM model (1590–1980) and the IGRF model (1980–2010) in 2 year increments. |
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Date | |||
Source |
Own work |
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Author | Tentotwo | ||
SVG development InfoField |
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Year | Latitude | Longitude | Observer |
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1831 | 70° 05' N | 96° 47' W | James Ross |
1904 | 70° 31' N | 96° 34' W | Amundsen |
1948 | 73° 54' N | 100° 54' W | Serson, Clark |
1962 | 75° 06' N | 100° 48' W | Loomer, Dawson |
1973 | 76° 00' N | 100° 36' W | Niblett, Charboneau |
1984 | 77° 00' N | 102° 18' W | Newitt, Niblett |
1994 | 78° 18' N | 104° 00' W | Newitt, Barton |
2001 | 81° 18' N | 110° 48' W | Newitt, Mandea, McKee |
2007 | 83.95° N | 120.72° W | Newitt, Chulliat, Orgeval |
GMT Source Code
GMT is a Generic Mapping Tool.
<source lang="bash">
- !/bin/sh
GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 -Ba10g10 --POLAR_CAP=none --BASEMAP_TYPE=plain --BASEMAP_AXES=WeS 50m_land.gmt -K -G224/224/224 > aeqd.ps GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 50m_coastline.gmt -O -K -W100/100/100 >> aeqd.ps GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 50m_borders.gmt -O -K -W100/100/100 >> aeqd.ps grep "2.000$\|4.000$\|6.000$\|8.000$\|0.000$" NP.xy | GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 -O -K -Sc0.05c -G50/10/220 >> aeqd.ps grep "00.000$" NP.xy | GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 -O -K -Sc0.5c -Gred >> aeqd.ps GMT psxy -m -JE-105/90/15c -R-140/-70/65/90 observed_north_magnetic_poles.txt -O -K -Sc0.25c -G240/117/104 -Wthick,0/0/0>> aeqd.ps GMT pstext -JE-105/90/15c -R-140/-70/65/90 -G0/0/0 -Dj0.15c/0.05c observed_north_magnetic_poles.txt -O -K >> aeqd.ps
GMT psxy -m -JG-105/75/6.5c -X9c -Y9c -Rg -Ba30g30 --POLAR_CAP=none 110m_land.gmt -O -K -G224/224/224 >> aeqd.ps GMT psxy -m -JG-105/75/6.5c -Rg 110m_coastline.gmt -O -K -W100/100/100 >> aeqd.ps GMT psxy -m -JG-105/75/6.5c -Rg 110m_borders.gmt -O -K -W100/100/100 >> aeqd.ps GMT psxy -JG-105/75/6.5c -Rg -Wfat,50/81/50 -L -Am -O -K << EOF >> aeqd.ps -140.0 65.0 -140.0 90.0 -70.0 65.0 EOF grep "2.000$\|4.000$\|6.000$\|8.000$\|0.000$" NP.xy | GMT psxy -m -JG-105/75/6.5c -Rg -O -K -Sc0.03c -G50/10/220 >> aeqd.ps GMT psxy -m -JG-105/75/6.5c -Rg observed_north_magnetic_poles.txt -O -Sc0.07c -G240/117/104 >> aeqd.ps gv aeqd.ps -orientation=landscape -resize }} }}
Licensing
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- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Items portrayed in this file
depicts
18 January 2012
image/svg+xml
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 02:57, 11 August 2013 | 567 × 581 (470 KB) | wikimediacommons>Cavit | Added 2007 observed position from Newitt et al., Location of the North Magnetic Pole in April 2007, Earth Planets Space, 61, 703–710, 2009, http://www.terrapub.co.jp/journals/EPS/pdf/2009/6106/61060703.pdf |
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