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PropagaionDirection of
z=h
z
z=0
source
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0 10 20 30 40 50 600.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Frequency (Hz)
N
SMagneticField
(pT/H
z)
Schumann Resonance
Santa Cruz, California
1921 UT, 13 July 1998
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0
gg0
ii
r
r=a+h
r=a
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directionIncident wave Field
Geomagnetic
r
r=a
r=a+h
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