What is magnetic declination
in Black River, Northern Mariana Isl.?
Answer: -18.42° (-18°25')

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Black River
Latitude: 20° 21' 37" S
Longitude: 57° 21' 58" E
BLACK RIVER
Magnetic Declination: -18° 25'
Declination is NEGATIVE (WEST)
Inclination: 53° 32'
Magnetic field strength: 39741.3 nT

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