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James Van Allen journal, 1951?-December 1954

Page 119

Sydney Chapman and Julius Bartels
"Geomagnetism" Oxford (1940)
Volume II
page 644, Centered dipole pierces the earth's surface at 
78.5 degrees South
111 degrees East
and
78.5 degrees North
69 degrees West
page 648 [ff? figures?]

Eccentric Dipole

[sketch/picture]
geometric drawing of globe, axis, radius, off-center point C, etc, O, a

OC=0.0536(a)
=323 km
C is in 
latitude 6.5 degrees North
longitude 161.8 degrees East

C lies only 10 km south of the equatorial plane of the central dipole
   The extension of the axis of the eccentric dipole pierces the earth's surface at 
76.3 degrees South
121.2 East
and at
80.1 degrees North
277.3 degrees East
or 
80.1 degrees North
82.7 degrees West
-------------------------------------------------------------------
[Vestive? Vestine? Vostine?] et al. [="and others"] (1945) Location of Geomagnetic Pole

[phi?]=78.6 degrees North, lambda=289.9 degrees East       ( North : M=8.06 x (10 exponent 25) c.g.s. )

[phi?]=78.6 degrees South, lambda=109.9 degrees East       ( South : M=8.06 x (10 exponent 25) c.g.s. )

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Sydney Chapman and Julius Bartels "Geomagnetism" Oxford (1940) Volume II page 644, Centered dipole pierces the earth's surface at 78.5 degrees South 111 degrees East and 78.5 degrees North 69 degrees West page 648 [ff? figures?] Eccentric Dipole [sketch/picture] geometric drawing of globe, axis, radius, off-center point C, etc, O, a OC=0.0536(a) =323 km C is in latitude 6.5 degrees North longitude 161.8 degrees East C lies only 10 km south of the equatorial plane of the central dipole The extension of the axis of the eccentric dipole pierces the earth's surface at 76.3 degrees South 121.2 East and at 80.1 degrees North 277.3 degrees East or 80.1 degrees North 82.7 degrees West ------------------------------------------------------------------- [Vestive? Vestine? Vostine?] et al. [="and others"] (1945) Location of Geomagnetic Pole [phi?]=78.6 degrees North, lambda=289.9 degrees East ( North : M=8.06 x (10 exponent 25) c.g.s. ) [phi?]=78.6 degrees South, lambda=109.9 degrees East ( South : M=8.06 x (10 exponent 25) c.g.s. )