magnetic anomaly
anomaly of the Earth's or other astronomical object's magnetic field
Bangui magnetic anomaly
anomaly of the Earth's magnetic field in Africa
Stokes Magnetic Anomaly
magnetic Anomaly in South Pacific region
South Atlantic Anomaly
area in South Atlantic where the Earth's magnetic field is weakest relative to an idealized dipole, so that the inner Van Allen radiation belt comes closest to the Earth's surface (altitude 200 km), exposing satellites to higher-than-usual radiation