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Participant: part of or influencing processesMagnetic field
Appears in 1 process and 3 steps. Everything below is linked: open a process to see it in context.
Top processes
- Rotation organises the flow so the field outside the core is mostly a dipole, with surface intensity of about 22,000 to 65,000 nT
- The dipole has weakened about 9% in 150 years and about 30% in 2,000 years, mainly from reversed-flux patches growing under the South Atlantic
- The field reverses polarity irregularly (spacings from 5,000 years to 50 million years; last reversal about 780,000 years ago), taking thousands of years with a
Often found with
Known by 909 participants and resources across the map.