Unit nT
Name nanotesla
Category Magnetic Flux Density
Details In the field of Magnetic Flux Density, nT (nanotesla) is a unit used to measure the strength of a magnetic field. Magnetic Flux Density is a vector quantity that describes the concentration of magnetic field lines in a given area, indicating the force experienced by a charged particle moving through it.

The nanotesla (nT) is a derived unit of the International System of Units (SI), equal to one-billionth of a tesla (1 nT = 10^-9 T). The tesla (T) is the standard unit of Magnetic Flux Density and is named after the inventor and engineer Nikola Tesla. It is defined as the force experienced by a unit charge moving through the magnetic field at a specified velocity:

1 T = 1 N·s/(C·m) = 1 kg/(A·s²)

Using nanotesla as a unit allows for convenient measurement and comparison of weak or subtle magnetic fields, such as the Earth's magnetic field, which has a typical strength of approximately 25,000 to 65,000 nT. Nanoteslas are also used in geophysics, space weather, and other scientific fields concerned with the study and monitoring of faint magnetic fields.