Archiv: South Atlantic Anomaly

21.02.2021 - 13:44 [ ]

Terrawatch: the South Atlantic Anomaly – a growing weak spot in Earth’s magnetic field


We know that the Earth’s magnetic field has decayed by about 5% per century since measurements began in 1840. And much of that decay is associated with a strangely weak spot between South America and southern Africa, known as the South Atlantic Anomaly. This patch has grown over the last 250 years and today the weak field messes with satellite technology.

21.02.2021 - 13:38 [ ]

Part of Earth’s Magnetic Field is Getting Weaker in ‚Vigorously‘ Developing Anomaly, Scientists Say


According to the European Space Agency (ESA), the magnetic field has lost around 9 percent of its strength over the preceding two centuries. One section of the magnetic field has been found to have weakened considerably since 1970.

This patch, called the South Atlantic Anomaly, sits between Africa and South America. Over the last 50 years, it has grown and moved farther west at a rate of roughly 12 miles per year.