As reviewed by Jeff Childers this morning – see 1st comment attached.

At the heart of the US space agency’s concerns is a geomagnetic phenomenon that is as fascinating as it is worrying: the South Atlantic Anomaly (SAA). This immense region is characterised by a significantly reduced magnetic intensity compared with the surrounding areas. Far from being a mere scientific curiosity, this weakness acts like a breach in our natural protective shield, allowing high-energy solar particles to come dangerously close to the Earth’s surface.

https://farmingdale-observer.com/2025/04/29/nasa-is-growing-concerned-as-a-massive-anomaly-spreads-across-earth-scientists-believe-its-linked-to-deep-earth-forces/?