Strength.
The strength of the magnetic field is measured by the dipole moment, which is expressed in ampere square metres (Am2). A powerful fridge magnet has a dipole moment of 1 Am2. Earth's present dipole moment is 81022 Am2.
The strength of the magnetic field is measured by the dipole moment, which is expressed in ampere square metres (Am2). A powerful fridge magnet has a dipole moment of 1 Am2. Earth's present dipole moment is 81022 Am2.