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Table 1 Longitude ranges and magnetic declinations in the seven longitude sectors

From: Correlation between the global occurrences of ionospheric irregularities and deep atmospheric convective clouds in the intertropical convergence zone (ITCZ)

Region

Longitude range

Magnetic declination

Africa

10° to 40° E

Approximately 0°

Indian

60° to 100° E

Approximately 0°

West Pacific

110° to 150° E

Approximately 0°

Central Pacific

160° E to 160° W

Approximately +10°

East Pacific

100° to 140° W

Approximately +10°

South America

45° to 75° W

Approximately -20°

Atlantic

10° to 40° W

Approximately -15°