Planetary Magnetic Field Strength Rechner — Formel
## Planetary Magnetic Field
A planet's magnetic field can be approximated as a dipole near the surface.
### Equatorial Field
**B_eq = (mu0 / 4pi) * M / R cubed**
where mu0/(4pi) = 1e-7 T m/A.
### Polar Field
**B_pole = 2 * B_eq**
Earth's dipole moment is about 7.94 x 10^22 A m2, giving an equatorial field of roughly 3 x 10^-5 T (0.3 Gauss).
A planet's magnetic field can be approximated as a dipole near the surface.
### Equatorial Field
**B_eq = (mu0 / 4pi) * M / R cubed**
where mu0/(4pi) = 1e-7 T m/A.
### Polar Field
**B_pole = 2 * B_eq**
Earth's dipole moment is about 7.94 x 10^22 A m2, giving an equatorial field of roughly 3 x 10^-5 T (0.3 Gauss).
Lösungsbeispiel
Earth: dipole moment = 7.94e22 A m2, radius = 6.371e6 m.
- B_eq = 1e-7 * M / R cubed
- R cubed = (6.371e6)^3 = 2.586e20
- B_eq = 1e-7 * 7.94e22 / 2.586e20
- B_eq = 3.07e-5 T = 0.307 Gauss