... the strength of Earth’s magnetic field has been decreasing for the last 160 years at an alarming rate. This collapse is focused on the great expansion of the Southern Hemisphere, known as the South Atlantic Anomaly, and extending from Zimbabwe to Chile. The magnetic field strength is so weak there that it’s a hazard for satellites that orbit above the region — the field no longer protects them from radiation which interferes with satellite electronics.
And the field is continuing to grow weaker, potentially portending even more dramatic events, including a global reversal of the magnetic poles.
Not normal. What is any more? What does normal even mean?