News for hackers. Stuff that matters.

A comment on Has Earth’s inner core stopped its strange spin?. Parent comment

Re:Has Earth’s inner core stopped its strange spin? by htag on Tuesday January 24, 2023 @12:43AM (#34499844)
Yes, our magnetosphere has had extended periods (~hundreds of years) of being in a weakened state without disrupting all life on Earth. Our empirical evidence on the size of the impact is limited, mostly due to how long ago it was. It was a big enough impact that it did leave evidence.

It's not an humanity destroying event, but it is a big stressor on a world already going through a lot.

[ Parent | on HN ]
Re:Has Earth’s inner core stopped its strange spin? by chasil on Tuesday January 24, 2023 @04:41PM (#34510860)
It's actually measured in thousands of years.

"Other sources estimate that the time that it takes for a reversal to complete is on average around 7,000 years for the four most recent reversals."

A range of 2k-12k is also in the introduction.

https://en.wikipedia.org/wiki/Geomagnetic_reversal

[ Parent | on HN ]