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(*MAGNETIC STORMS
(*AURORAE
1
(*IONOSPHERIC DISTURBANCES
1
ANOMALIES
1
ANTARCTIC REGIONS
1
ARCTIC REGIONS
1
ATMOSPHERICS
1
AURORAE)
1
CANADA
1
ELECTRICAL CONDUCTIVITY
1
ELECTROMAGNETIC RADIATION
1
ELECTRONIC RECORDING SYSTEMS
1
GEOPHYSICS
1
Geomagnetism
1
IONOSPHERE)
1
IONOSPHERIC PROPAGATION
1
MAGNETIC FIELDS
1
MAGNETIC STORMS)
1
MICROPULSATIONS
1
SURFACE PROPERTIES
1
THEORY
1
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