kgov.com
- 1840 - 1970: 5% weakening per century
- 1970 - 2018: ~7% weakening per century
- 2019: 5% weakening
per decade according to a rumor from Drudge,
zerohedge,
Forbes, and
Quora, claiming that NASA's SWARM satellite has measured this. And there's the concurrent record-breaking speed of the
movement of the magnetic north pole now at
55 km per year and headed toward Siberia
Earth's Magnetic Field Decay: As summarized by University of Maryland geophysicist Daniel Lathrop, “In particular, over the last 150 years or so, the Earth’s magnetic field has declined in strength about ten percent, and continues to decline in strength [as is evident] every time people go and make new measurements.” Creationists point out that this rapid decay is not expected in such a brief snapshot in time if our planet were 4.6 billion years old. On the other hand, these careful, long-term, and worldwide measurements that document the
rapidly decreasing strength of Earth's magnetic field are consistent with a young Earth. Lathrop, not surprisingly, is an old-earth geophysicist who nonetheless acknowledged this data at the opening of and midway through the 2013 program
Magnetic Shield, an episode of The Weather Channel's
Secrets of the Earth with theoretical physicist (emphasis on the theoretical), Michio Kaku.
For example, if the energy of the field has been dissipating at the current rate, going back only a million years would produce such heat that the oceans would have burned off the Earth, which clearly they have not.